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cosmopolitan/third_party/make/main.c
Justine Tunney ec480f5aa0
Make improvements 
- Every unit test now passes on Apple Silicon. The final piece of this
  puzzle was porting our POSIX threads cancelation support, since that
  works differently on ARM64 XNU vs. AMD64. Our semaphore support on
  Apple Silicon is also superior now compared to AMD64, thanks to the
  grand central dispatch library which lets *NSYNC locks go faster.

- The Cosmopolitan runtime is now more stable, particularly on Windows.
  To do this, thread local storage is mandatory at all runtime levels,
  and the innermost packages of the C library is no longer being built
  using ASAN. TLS is being bootstrapped with a 128-byte TIB during the
  process startup phase, and then later on the runtime re-allocates it
  either statically or dynamically to support code using _Thread_local.
  fork() and execve() now do a better job cooperating with threads. We
  can now check how much stack memory is left in the process or thread
  when functions like kprintf() / execve() etc. call alloca(), so that
  ENOMEM can be raised, reduce a buffer size, or just print a warning.

- POSIX signal emulation is now implemented the same way kernels do it
  with pthread_kill() and raise(). Any thread can interrupt any other
  thread, regardless of what it's doing. If it's blocked on read/write
  then the killer thread will cancel its i/o operation so that EINTR can
  be returned in the mark thread immediately. If it's doing a tight CPU
  bound operation, then that's also interrupted by the signal delivery.
  Signal delivery works now by suspending a thread and pushing context
  data structures onto its stack, and redirecting its execution to a
  trampoline function, which calls SetThreadContext(GetCurrentThread())
  when it's done.

- We're now doing a better job managing locks and handles. On NetBSD we
  now close semaphore file descriptors in forked children. Semaphores on
  Windows can now be canceled immediately, which means mutexes/condition
  variables will now go faster. Apple Silicon semaphores can be canceled
  too. We're now using Apple's pthread_yield() funciton. Apple _nocancel
  syscalls are now used on XNU when appropriate to ensure pthread_cancel
  requests aren't lost. The MbedTLS library has been updated to support
  POSIX thread cancelations. See tool/build/runitd.c for an example of
  how it can be used for production multi-threaded tls servers. Handles
  on Windows now leak less often across processes. All i/o operations on
  Windows are now overlapped, which means file pointers can no longer be
  inherited across dup() and fork() for the time being.

- We now spawn a thread on Windows to deliver SIGCHLD and wakeup wait4()
  which means, for example, that posix_spawn() now goes 3x faster. POSIX
  spawn is also now more correct. Like Musl, it's now able to report the
  failure code of execve() via a pipe although our approach favors using
  shared memory to do that on systems that have a true vfork() function.

- We now spawn a thread to deliver SIGALRM to threads when setitimer()
  is used. This enables the most precise wakeups the OS makes possible.

- The Cosmopolitan runtime now uses less memory. On NetBSD for example,
  it turned out the kernel would actually commit the PT_GNU_STACK size
  which caused RSS to be 6mb for every process. Now it's down to ~4kb.
  On Apple Silicon, we reduce the mandatory upstream thread size to the
  smallest possible size to reduce the memory overhead of Cosmo threads.
  The examples directory has a program called greenbean which can spawn
  a web server on Linux with 10,000 worker threads and have the memory
  usage of the process be ~77mb. The 1024 byte overhead of POSIX-style
  thread-local storage is now optional; it won't be allocated until the
  pthread_setspecific/getspecific functions are called. On Windows, the
  threads that get spawned which are internal to the libc implementation
  use reserve rather than commit memory, which shaves a few hundred kb.

- sigaltstack() is now supported on Windows, however it's currently not
  able to be used to handle stack overflows, since crash signals are
  still generated by WIN32. However the crash handler will still switch
  to the alt stack, which is helpful in environments with tiny threads.

- Test binaries are now smaller. Many of the mandatory dependencies of
  the test runner have been removed. This ensures many programs can do a
  better job only linking the the thing they're testing. This caused the
  test binaries for LIBC_FMT for example, to decrease from 200kb to 50kb

- long double is no longer used in the implementation details of libc,
  except in the APIs that define it. The old code that used long double
  for time (instead of struct timespec) has now been thoroughly removed.

- ShowCrashReports() is now much tinier in MODE=tiny. Instead of doing
  backtraces itself, it'll just print a command you can run on the shell
  using our new `cosmoaddr2line` program to view the backtrace.

- Crash report signal handling now works in a much better way. Instead
  of terminating the process, it now relies on SA_RESETHAND so that the
  default SIG_IGN behavior can terminate the process if necessary.

- Our pledge() functionality has now been fully ported to AARCH64 Linux.
2023-09-18 21:04:47 -07:00

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/* Argument parsing and main program of GNU Make.
Copyright (C) 1988-2020 Free Software Foundation, Inc.
This file is part of GNU Make.
GNU Make is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3 of the License, or (at your option) any later
version.
GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>. */
#include "third_party/make/makeint.inc"
/**/
#include "third_party/make/filedef.h"
#include "third_party/make/os.h"
/**/
#include "third_party/make/dep.h"
#include "third_party/make/job.h"
#include "third_party/make/variable.h"
/**/
#include "third_party/make/commands.h"
#include "third_party/make/debug.h"
#include "third_party/make/rule.h"
/**/
#include "libc/calls/calls.h"
#include "libc/calls/struct/bpf.internal.h"
#include "libc/calls/struct/filter.internal.h"
#include "libc/calls/struct/seccomp.internal.h"
#include "libc/calls/syscall_support-sysv.internal.h"
#include "libc/dce.h"
#include "libc/limits.h"
#include "libc/macros.internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/stack.h"
#include "libc/sock/sock.h"
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/audit.h"
#include "libc/sysv/consts/pr.h"
#include "libc/sysv/consts/sig.h"
#include "third_party/make/getopt.h"
// clang-format off
STATIC_STACK_SIZE(0x00800000); // 8mb stack
#define HAVE_WAIT_NOHANG
static void clean_jobserver (int status);
static void print_data_base (void);
static void print_version (void);
static void decode_switches (int argc, const char **argv, int env);
static void decode_env_switches (const char *envar, size_t len);
static struct variable *define_makeflags (int all, int makefile);
static char *quote_for_env (char *out, const char *in);
static void initialize_global_hash_tables (void);
/* The structure that describes an accepted command switch. */
struct command_switch
{
int c; /* The switch character. */
enum /* Type of the value. */
{
flag, /* Turn int flag on. */
flag_off, /* Turn int flag off. */
string, /* One string per invocation. */
strlist, /* One string per switch. */
filename, /* A string containing a file name. */
positive_int, /* A positive integer. */
floating, /* A floating-point number (double). */
ignore /* Ignored. */
} type;
void *value_ptr; /* Pointer to the value-holding variable. */
unsigned int env:1; /* Can come from MAKEFLAGS. */
unsigned int toenv:1; /* Should be put in MAKEFLAGS. */
unsigned int no_makefile:1; /* Don't propagate when remaking makefiles. */
const void *noarg_value; /* Pointer to value used if no arg given. */
const void *default_value; /* Pointer to default value. */
const char *long_name; /* Long option name. */
};
/* True if C is a switch value that corresponds to a short option. */
#define short_option(c) ((c) <= CHAR_MAX)
/* The structure used to hold the list of strings given
in command switches of a type that takes strlist arguments. */
struct stringlist
{
const char **list; /* Nil-terminated list of strings. */
unsigned int idx; /* Index into above. */
unsigned int max; /* Number of pointers allocated. */
};
/* The recognized command switches. */
/* Nonzero means do extra verification (that may slow things down). */
int verify_flag;
/* Nonzero means do not print commands to be executed (-s). */
static int silent_flag;
static const int default_silent_flag = 0;
/* Nonzero means either -s was given, or .SILENT-with-no-deps was seen. */
int run_silent = 0;
/* Nonzero means just touch the files
that would appear to need remaking (-t) */
int touch_flag;
/* Nonzero means just print what commands would need to be executed,
don't actually execute them (-n). */
int just_print_flag;
/* Print debugging info (--debug). */
static struct stringlist *db_flags = 0;
static int debug_flag = 0;
int db_level = 0;
/* Synchronize output (--output-sync). */
char *output_sync_option = 0;
/* Environment variables override makefile definitions. */
int env_overrides = 0;
/* Nonzero means ignore status codes returned by commands
executed to remake files. Just treat them all as successful (-i). */
int ignore_errors_flag = 0;
/* Nonzero means don't remake anything, just print the data base
that results from reading the makefile (-p). */
int print_data_base_flag = 0;
/* Nonzero means don't remake anything; just return a nonzero status
if the specified targets are not up to date (-q). */
int question_flag = 0;
/* Nonzero means do not use any of the builtin rules (-r) / variables (-R). */
int no_builtin_rules_flag = 0;
int no_builtin_variables_flag = 0;
/* Nonzero means keep going even if remaking some file fails (-k). */
int keep_going_flag;
static const int default_keep_going_flag = 0;
/* Nonzero means check symlink mtimes. */
int check_symlink_flag = 0;
/* Nonzero means print directory before starting and when done (-w). */
int print_directory_flag = 0;
/* Nonzero means ignore print_directory_flag and never print the directory.
This is necessary because print_directory_flag is set implicitly. */
int inhibit_print_directory_flag = 0;
/* Nonzero means print version information. */
int print_version_flag = 0;
/* List of makefiles given with -f switches. */
static struct stringlist *makefiles = 0;
/* Size of the stack when we started. */
struct rlimit stack_limit;
/* Number of job slots for parallelism. */
unsigned int job_slots;
#define INVALID_JOB_SLOTS (-1)
static unsigned int master_job_slots = 0;
static int arg_job_slots = INVALID_JOB_SLOTS;
static const int default_job_slots = INVALID_JOB_SLOTS;
/* Value of job_slots that means no limit. */
static const int inf_jobs = 0;
/* Authorization for the jobserver. */
static char *jobserver_auth = NULL;
/* Handle for the mutex used on Windows to synchronize output of our
children under -O. */
char *sync_mutex = NULL;
/* Maximum load average at which multiple jobs will be run.
Negative values mean unlimited, while zero means limit to
zero load (which could be useful to start infinite jobs remotely
but one at a time locally). */
double max_load_average = -1.0;
double default_load_average = -1.0;
/* List of directories given with -C switches. */
static struct stringlist *directories = 0;
/* List of include directories given with -I switches. */
static struct stringlist *include_directories = 0;
/* List of files given with -o switches. */
static struct stringlist *old_files = 0;
/* List of files given with -W switches. */
static struct stringlist *new_files = 0;
/* List of strings to be eval'd. */
static struct stringlist *eval_strings = 0;
/* If nonzero, we should just print usage and exit. */
static int print_usage_flag = 0;
/* If nonzero, we should print a warning message
for each reference to an undefined variable. */
int warn_undefined_variables_flag;
/* If nonzero, always build all targets, regardless of whether
they appear out of date or not. */
static int always_make_set = 0;
int always_make_flag = 0;
/* If nonzero, we're in the "try to rebuild makefiles" phase. */
int rebuilding_makefiles = 0;
/* Remember the original value of the SHELL variable, from the environment. */
struct variable shell_var;
/* This character introduces a command: it's the first char on the line. */
char cmd_prefix = '\t';
/* The usage output. We write it this way to make life easier for the
translators, especially those trying to translate to right-to-left
languages like Hebrew. */
static const char *const usage[] =
{
N_("Options:\n"),
N_("\
-b, -m Ignored for compatibility.\n"),
N_("\
-B, --always-make Unconditionally make all targets.\n"),
N_("\
-C DIRECTORY, --directory=DIRECTORY\n\
Change to DIRECTORY before doing anything.\n"),
N_("\
-d Print lots of debugging information.\n"),
N_("\
--debug[=FLAGS] Print various types of debugging information.\n"),
N_("\
-e, --environment-overrides\n\
Environment variables override makefiles.\n"),
N_("\
-E STRING, --eval=STRING Evaluate STRING as a makefile statement.\n"),
N_("\
-f FILE, --file=FILE, --makefile=FILE\n\
Read FILE as a makefile.\n"),
N_("\
-h, --help Print this message and exit.\n"),
N_("\
-i, --ignore-errors Ignore errors from recipes.\n"),
N_("\
-I DIRECTORY, --include-dir=DIRECTORY\n\
Search DIRECTORY for included makefiles.\n"),
N_("\
-j [N], --jobs[=N] Allow N jobs at once; infinite jobs with no arg.\n"),
N_("\
-k, --keep-going Keep going when some targets can't be made.\n"),
N_("\
-l [N], --load-average[=N], --max-load[=N]\n\
Don't start multiple jobs unless load is below N.\n"),
N_("\
-L, --check-symlink-times Use the latest mtime between symlinks and target.\n"),
N_("\
-n, --just-print, --dry-run, --recon\n\
Don't actually run any recipe; just print them.\n"),
N_("\
-o FILE, --old-file=FILE, --assume-old=FILE\n\
Consider FILE to be very old and don't remake it.\n"),
N_("\
-O[TYPE], --output-sync[=TYPE]\n\
Synchronize output of parallel jobs by TYPE.\n"),
N_("\
-p, --print-data-base Print make's internal database.\n"),
N_("\
-q, --question Run no recipe; exit status says if up to date.\n"),
N_("\
-r, --no-builtin-rules Disable the built-in implicit rules.\n"),
N_("\
-R, --no-builtin-variables Disable the built-in variable settings.\n"),
N_("\
-s, --silent, --quiet Don't echo recipes.\n"),
N_("\
--no-silent Echo recipes (disable --silent mode).\n"),
N_("\
-S, --no-keep-going, --stop\n\
Turns off -k.\n"),
N_("\
-t, --touch Touch targets instead of remaking them.\n"),
N_("\
--trace Print tracing information.\n"),
N_("\
-v, --version Print the version number of make and exit.\n"),
N_("\
-w, --print-directory Print the current directory.\n"),
N_("\
--no-print-directory Turn off -w, even if it was turned on implicitly.\n"),
N_("\
-W FILE, --what-if=FILE, --new-file=FILE, --assume-new=FILE\n\
Consider FILE to be infinitely new.\n"),
N_("\
--warn-undefined-variables Warn when an undefined variable is referenced.\n"),
N_("\
--strace Log system calls.\n"),
N_("\
--ftrace Log function calls.\n"),
NULL
};
/* The table of command switches.
Order matters here: this is the order MAKEFLAGS will be constructed.
So be sure all simple flags (single char, no argument) come first. */
static const struct command_switch switches[] =
{
{ 'b', ignore, 0, 0, 0, 0, 0, 0, 0 },
{ 'B', flag, &always_make_set, 1, 1, 0, 0, 0, "always-make" },
{ 'd', flag, &debug_flag, 1, 1, 0, 0, 0, 0 },
{ 'e', flag, &env_overrides, 1, 1, 0, 0, 0, "environment-overrides", },
{ 'E', strlist, &eval_strings, 1, 0, 0, 0, 0, "eval" },
{ 'h', flag, &print_usage_flag, 0, 0, 0, 0, 0, "help" },
{ 'i', flag, &ignore_errors_flag, 1, 1, 0, 0, 0, "ignore-errors" },
{ 'k', flag, &keep_going_flag, 1, 1, 0, 0, &default_keep_going_flag,
"keep-going" },
{ 'L', flag, &check_symlink_flag, 1, 1, 0, 0, 0, "check-symlink-times" },
{ 'm', ignore, 0, 0, 0, 0, 0, 0, 0 },
{ 'n', flag, &just_print_flag, 1, 1, 1, 0, 0, "just-print" },
{ 'p', flag, &print_data_base_flag, 1, 1, 0, 0, 0, "print-data-base" },
{ 'q', flag, &question_flag, 1, 1, 1, 0, 0, "question" },
{ 'r', flag, &no_builtin_rules_flag, 1, 1, 0, 0, 0, "no-builtin-rules" },
{ 'R', flag, &no_builtin_variables_flag, 1, 1, 0, 0, 0,
"no-builtin-variables" },
{ 's', flag, &silent_flag, 1, 1, 0, 0, &default_silent_flag, "silent" },
{ 'S', flag_off, &keep_going_flag, 1, 1, 0, 0, &default_keep_going_flag,
"no-keep-going" },
{ 't', flag, &touch_flag, 1, 1, 1, 0, 0, "touch" },
{ 'v', flag, &print_version_flag, 1, 1, 0, 0, 0, "version" },
{ 'w', flag, &print_directory_flag, 1, 1, 0, 0, 0, "print-directory" },
/* These options take arguments. */
{ 'C', filename, &directories, 0, 0, 0, 0, 0, "directory" },
{ 'f', filename, &makefiles, 0, 0, 0, 0, 0, "file" },
{ 'I', filename, &include_directories, 1, 1, 0, 0, 0,
"include-dir" },
{ 'j', positive_int, &arg_job_slots, 1, 1, 0, &inf_jobs, &default_job_slots,
"jobs" },
{ 'l', floating, &max_load_average, 1, 1, 0, &default_load_average,
&default_load_average, "load-average" },
{ 'o', filename, &old_files, 0, 0, 0, 0, 0, "old-file" },
{ 'O', string, &output_sync_option, 1, 1, 0, "target", 0, "output-sync" },
{ 'W', filename, &new_files, 0, 0, 0, 0, 0, "what-if" },
/* These are long-style options. */
{ CHAR_MAX+1, strlist, &db_flags, 1, 1, 0, "basic", 0, "debug" },
{ CHAR_MAX+2, string, &jobserver_auth, 1, 1, 0, 0, 0, "jobserver-auth" },
{ CHAR_MAX+3, flag, &trace_flag, 1, 1, 0, 0, 0, "trace" },
{ CHAR_MAX+4, flag, &inhibit_print_directory_flag, 1, 1, 0, 0, 0,
"no-print-directory" },
{ CHAR_MAX+5, flag, &warn_undefined_variables_flag, 1, 1, 0, 0, 0,
"warn-undefined-variables" },
{ CHAR_MAX+7, string, &sync_mutex, 1, 1, 0, 0, 0, "sync-mutex" },
{ CHAR_MAX+8, flag_off, &silent_flag, 1, 1, 0, 0, &default_silent_flag, "no-silent" },
{ CHAR_MAX+9, string, &jobserver_auth, 1, 0, 0, 0, 0, "jobserver-fds" },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};
/* Secondary long names for options. */
static struct option long_option_aliases[] =
{
{ "quiet", no_argument, 0, 's' },
{ "stop", no_argument, 0, 'S' },
{ "new-file", required_argument, 0, 'W' },
{ "assume-new", required_argument, 0, 'W' },
{ "assume-old", required_argument, 0, 'o' },
{ "max-load", optional_argument, 0, 'l' },
{ "dry-run", no_argument, 0, 'n' },
{ "recon", no_argument, 0, 'n' },
{ "makefile", required_argument, 0, 'f' },
};
/* List of goal targets. */
static struct goaldep *goals, *lastgoal;
/* List of variables which were defined on the command line
(or, equivalently, in MAKEFLAGS). */
struct command_variable
{
struct command_variable *next;
struct variable *variable;
};
static struct command_variable *command_variables;
/* The name we were invoked with. */
const char *program;
/* Our current directory before processing any -C options. */
char *directory_before_chdir;
/* Our current directory after processing all -C options. */
char *starting_directory;
/* Value of the MAKELEVEL variable at startup (or 0). */
unsigned int makelevel;
/* Pointer to the value of the .DEFAULT_GOAL special variable.
The value will be the name of the goal to remake if the command line
does not override it. It can be set by the makefile, or else it's
the first target defined in the makefile whose name does not start
with '.'. */
struct variable * default_goal_var;
/* Pointer to structure for the file .DEFAULT
whose commands are used for any file that has none of its own.
This is zero if the makefiles do not define .DEFAULT. */
struct file *default_file;
/* Nonzero if we have seen the magic '.POSIX' target.
This turns on pedantic compliance with POSIX.2. */
int posix_pedantic;
/* Nonzero if we have seen the '.SECONDEXPANSION' target.
This turns on secondary expansion of prerequisites. */
int second_expansion;
/* Nonzero if we have seen the '.ONESHELL' target.
This causes the entire recipe to be handed to SHELL
as a single string, potentially containing newlines. */
int one_shell;
/* One of OUTPUT_SYNC_* if the "--output-sync" option was given. This
attempts to synchronize the output of parallel jobs such that the results
of each job stay together. */
int output_sync = OUTPUT_SYNC_NONE;
/* Nonzero if the "--trace" option was given. */
int trace_flag = 0;
/* Nonzero if we have seen the '.NOTPARALLEL' target.
This turns off parallel builds for this invocation of make. */
int not_parallel;
/* Nonzero if some rule detected clock skew; we keep track so (a) we only
print one warning about it during the run, and (b) we can print a final
warning at the end of the run. */
int clock_skew_detected;
/* Map of possible stop characters for searching strings. */
unsigned short stopchar_map[UCHAR_MAX + 1] = {0};
/* If output-sync is enabled we'll collect all the output generated due to
options, while reading makefiles, etc. */
struct output make_sync;
/* Mask of signals that are being caught with fatal_error_signal. */
sigset_t fatal_signal_set;
typedef RETSIGTYPE (*bsd_signal_ret_t) (int);
static bsd_signal_ret_t
bsd_signal (int sig, bsd_signal_ret_t func)
{
struct sigaction act, oact;
act.sa_handler = func;
act.sa_flags = SA_RESTART;
sigemptyset (&act.sa_mask);
sigaddset (&act.sa_mask, sig);
if (sigaction (sig, &act, &oact) != 0)
return SIG_ERR;
return oact.sa_handler;
}
static void
initialize_global_hash_tables (void)
{
init_hash_global_variable_set ();
strcache_init ();
init_hash_files ();
hash_init_directories ();
hash_init_function_table ();
}
/* This character map locate stop chars when parsing GNU makefiles.
Each element is true if we should stop parsing on that character. */
static void
initialize_stopchar_map (void)
{
int i;
stopchar_map[(int)'\0'] = MAP_NUL;
stopchar_map[(int)'#'] = MAP_COMMENT;
stopchar_map[(int)';'] = MAP_SEMI;
stopchar_map[(int)'='] = MAP_EQUALS;
stopchar_map[(int)':'] = MAP_COLON;
stopchar_map[(int)'|'] = MAP_PIPE;
stopchar_map[(int)'.'] = MAP_DOT | MAP_USERFUNC;
stopchar_map[(int)','] = MAP_COMMA;
stopchar_map[(int)'('] = MAP_VARSEP;
stopchar_map[(int)'{'] = MAP_VARSEP;
stopchar_map[(int)'}'] = MAP_VARSEP;
stopchar_map[(int)')'] = MAP_VARSEP;
stopchar_map[(int)'$'] = MAP_VARIABLE;
stopchar_map[(int)'-'] = MAP_USERFUNC;
stopchar_map[(int)'_'] = MAP_USERFUNC;
stopchar_map[(int)' '] = MAP_BLANK;
stopchar_map[(int)'\t'] = MAP_BLANK;
stopchar_map[(int)'/'] = MAP_DIRSEP;
#if defined(HAVE_DOS_PATHS)
stopchar_map[(int)'\\'] |= MAP_DIRSEP;
#endif
for (i = 1; i <= UCHAR_MAX; ++i)
{
if (isspace (i) && NONE_SET (stopchar_map[i], MAP_BLANK))
/* Don't mark blank characters as newline characters. */
stopchar_map[i] |= MAP_NEWLINE;
else if (isalnum (i))
stopchar_map[i] |= MAP_USERFUNC;
}
}
static const char *
expand_command_line_file (const char *name)
{
const char *cp;
char *expanded = 0;
if (name[0] == '\0')
O (fatal, NILF, _("empty string invalid as file name"));
if (name[0] == '~')
{
expanded = tilde_expand (name);
if (expanded && expanded[0] != '\0')
name = expanded;
}
/* This is also done in parse_file_seq, so this is redundant
for names read from makefiles. It is here for names passed
on the command line. */
while (name[0] == '.' && name[1] == '/')
{
name += 2;
while (name[0] == '/')
/* Skip following slashes: ".//foo" is "foo", not "/foo". */
++name;
}
if (name[0] == '\0')
{
/* Nothing else but one or more "./", maybe plus slashes! */
name = "./";
}
cp = strcache_add (name);
free (expanded);
return cp;
}
/* Toggle -d on receipt of SIGUSR1. */
static RETSIGTYPE
debug_signal_handler (int sig UNUSED)
{
db_level = db_level ? DB_NONE : DB_BASIC;
}
static void
decode_debug_flags (void)
{
const char **pp;
if (debug_flag)
db_level = DB_ALL;
if (db_flags)
for (pp=db_flags->list; *pp; ++pp)
{
const char *p = *pp;
while (1)
{
switch (tolower (p[0]))
{
case 'a':
db_level |= DB_ALL;
break;
case 'b':
db_level |= DB_BASIC;
break;
case 'i':
db_level |= DB_BASIC | DB_IMPLICIT;
break;
case 'j':
db_level |= DB_JOBS;
break;
case 'm':
db_level |= DB_BASIC | DB_MAKEFILES;
break;
case 'n':
db_level = 0;
break;
case 'v':
db_level |= DB_BASIC | DB_VERBOSE;
break;
default:
OS (fatal, NILF,
_("unknown debug level specification '%s'"), p);
}
while (*(++p) != '\0')
if (*p == ',' || *p == ' ')
{
++p;
break;
}
if (*p == '\0')
break;
}
}
if (db_level)
verify_flag = 1;
if (! db_level)
debug_flag = 0;
}
static void
decode_output_sync_flags (void)
{
#ifdef NO_OUTPUT_SYNC
output_sync = OUTPUT_SYNC_NONE;
#else
if (output_sync_option)
{
if (streq (output_sync_option, "none"))
output_sync = OUTPUT_SYNC_NONE;
else if (streq (output_sync_option, "line"))
output_sync = OUTPUT_SYNC_LINE;
else if (streq (output_sync_option, "target"))
output_sync = OUTPUT_SYNC_TARGET;
else if (streq (output_sync_option, "recurse"))
output_sync = OUTPUT_SYNC_RECURSE;
else
OS (fatal, NILF,
_("unknown output-sync type '%s'"), output_sync_option);
}
if (sync_mutex)
RECORD_SYNC_MUTEX (sync_mutex);
#endif
}
#ifdef WINDOWS32
#ifndef NO_OUTPUT_SYNC
/* This is called from start_job_command when it detects that
output_sync option is in effect. The handle to the synchronization
mutex is passed, as a string, to sub-makes via the --sync-mutex
command-line argument. */
void
prepare_mutex_handle_string (sync_handle_t handle)
{
if (!sync_mutex)
{
/* Prepare the mutex handle string for our children. */
/* 2 hex digits per byte + 2 characters for "0x" + null. */
sync_mutex = xmalloc ((2 * sizeof (sync_handle_t)) + 2 + 1);
sprintf (sync_mutex, "0x%Ix", handle);
define_makeflags (1, 0);
}
}
#endif /* NO_OUTPUT_SYNC */
/*
* HANDLE runtime exceptions by avoiding a requestor on the GUI. Capture
* exception and print it to stderr instead.
*
* If ! DB_VERBOSE, just print a simple message and exit.
* If DB_VERBOSE, print a more verbose message.
* If compiled for DEBUG, let exception pass through to GUI so that
* debuggers can attach.
*/
LONG WINAPI
handle_runtime_exceptions (struct _EXCEPTION_POINTERS *exinfo)
{
PEXCEPTION_RECORD exrec = exinfo->ExceptionRecord;
LPSTR cmdline = GetCommandLine ();
LPSTR prg = strtok (cmdline, " ");
CHAR errmsg[1024];
#ifdef USE_EVENT_LOG
HANDLE hEventSource;
LPTSTR lpszStrings[1];
#endif
if (! ISDB (DB_VERBOSE))
{
sprintf (errmsg,
_("%s: Interrupt/Exception caught (code = 0x%lx, addr = 0x%p)\n"),
prg, exrec->ExceptionCode, exrec->ExceptionAddress);
fprintf (stderr, errmsg);
exit (255);
}
sprintf (errmsg,
_("\nUnhandled exception filter called from program %s\nExceptionCode = %lx\nExceptionFlags = %lx\nExceptionAddress = 0x%p\n"),
prg, exrec->ExceptionCode, exrec->ExceptionFlags,
exrec->ExceptionAddress);
if (exrec->ExceptionCode == EXCEPTION_ACCESS_VIOLATION
&& exrec->NumberParameters >= 2)
sprintf (&errmsg[strlen(errmsg)],
(exrec->ExceptionInformation[0]
? _("Access violation: write operation at address 0x%p\n")
: _("Access violation: read operation at address 0x%p\n")),
(PVOID)exrec->ExceptionInformation[1]);
/* turn this on if we want to put stuff in the event log too */
#ifdef USE_EVENT_LOG
hEventSource = RegisterEventSource (NULL, u"GNU Make");
lpszStrings[0] = errmsg;
if (hEventSource != NULL)
{
ReportEvent (hEventSource, /* handle of event source */
EVENTLOG_ERROR_TYPE, /* event type */
0, /* event category */
0, /* event ID */
NULL, /* current user's SID */
1, /* strings in lpszStrings */
0, /* no bytes of raw data */
lpszStrings, /* array of error strings */
NULL); /* no raw data */
(VOID) DeregisterEventSource (hEventSource);
}
#endif
/* Write the error to stderr too */
fprintf (stderr, errmsg);
#ifdef DEBUG
return EXCEPTION_CONTINUE_SEARCH;
#else
exit (255);
return (255); /* not reached */
#endif
}
/*
* On WIN32 systems we don't have the luxury of a /bin directory that
* is mapped globally to every drive mounted to the system. Since make could
* be invoked from any drive, and we don't want to propagate /bin/sh
* to every single drive. Allow ourselves a chance to search for
* a value for default shell here (if the default path does not exist).
*/
int
find_and_set_default_shell (const char *token)
{
int sh_found = 0;
char *atoken = 0;
const char *search_token;
const char *tokend;
PATH_VAR(sh_path);
extern const char *default_shell;
if (!token)
search_token = default_shell;
else
search_token = atoken = xstrdup (token);
/* If the user explicitly requests the DOS cmd shell, obey that request.
However, make sure that's what they really want by requiring the value
of SHELL either equal, or have a final path element of, "cmd" or
"cmd.exe" case-insensitive. */
tokend = search_token + strlen (search_token) - 3;
if (((tokend == search_token
|| (tokend > search_token
&& (tokend[-1] == '/' || tokend[-1] == '\\')))
&& !strcasecmp (tokend, "cmd"))
|| ((tokend - 4 == search_token
|| (tokend - 4 > search_token
&& (tokend[-5] == '/' || tokend[-5] == '\\')))
&& !strcasecmp (tokend - 4, "cmd.exe")))
{
batch_mode_shell = 1;
unixy_shell = 0;
sprintf (sh_path, "%s", search_token);
default_shell = xstrdup (w32ify (sh_path, 0));
DB (DB_VERBOSE, (_("find_and_set_shell() setting default_shell = %s\n"),
default_shell));
sh_found = 1;
}
else if (!no_default_sh_exe
&& (token == NULL || !strcmp (search_token, default_shell)))
{
/* no new information, path already set or known */
sh_found = 1;
}
else if (_access (search_token, 0) == 0)
{
/* search token path was found */
sprintf (sh_path, "%s", search_token);
default_shell = xstrdup (w32ify (sh_path, 0));
DB (DB_VERBOSE, (_("find_and_set_shell() setting default_shell = %s\n"),
default_shell));
sh_found = 1;
}
else
{
char *p;
struct variable *v = lookup_variable (STRING_SIZE_TUPLE ("PATH"));
/* Search Path for shell */
if (v && v->value)
{
char *ep;
p = v->value;
ep = strchr (p, PATH_SEPARATOR_CHAR);
while (ep && *ep)
{
*ep = '\0';
sprintf (sh_path, "%s/%s", p, search_token);
if (_access (sh_path, 0) == 0)
{
default_shell = xstrdup (w32ify (sh_path, 0));
sh_found = 1;
*ep = PATH_SEPARATOR_CHAR;
/* terminate loop */
p += strlen (p);
}
else
{
*ep = PATH_SEPARATOR_CHAR;
p = ++ep;
}
ep = strchr (p, PATH_SEPARATOR_CHAR);
}
/* be sure to check last element of Path */
if (p && *p)
{
sprintf (sh_path, "%s/%s", p, search_token);
if (_access (sh_path, 0) == 0)
{
default_shell = xstrdup (w32ify (sh_path, 0));
sh_found = 1;
}
}
if (sh_found)
DB (DB_VERBOSE,
(_("find_and_set_shell() path search set default_shell = %s\n"),
default_shell));
}
}
/* naive test */
if (!unixy_shell && sh_found
&& (strstr (default_shell, "sh") || strstr (default_shell, "SH")))
{
unixy_shell = 1;
batch_mode_shell = 0;
}
#ifdef BATCH_MODE_ONLY_SHELL
batch_mode_shell = 1;
#endif
free (atoken);
return (sh_found);
}
#endif /* WINDOWS32 */
static void
reset_jobserver (void)
{
jobserver_clear ();
free (jobserver_auth);
jobserver_auth = NULL;
}
int
main (int argc, char **argv, char **envp)
{
ShowCrashReports();
static char *stdin_nm = 0;
int makefile_status = MAKE_SUCCESS;
struct goaldep *read_files;
PATH_VAR (current_directory);
unsigned int restarts = 0;
unsigned int syncing = 0;
int argv_slots;
// [jart] workaround to prevent make -j fork bomb
default_load_average = __get_cpu_count();
max_load_average = default_load_average;
/* Useful for attaching debuggers, etc. */
SPIN ("main-entry");
output_init (&make_sync);
initialize_stopchar_map();
/* Get rid of any avoidable limit on stack size. */
{
struct rlimit rlim;
/* Set the stack limit huge so that alloca does not fail. */
if (getrlimit (RLIMIT_STACK, &rlim) == 0
&& rlim.rlim_cur > 0 && rlim.rlim_cur < rlim.rlim_max)
{
stack_limit = rlim;
rlim.rlim_cur = rlim.rlim_max;
setrlimit (RLIMIT_STACK, &rlim);
}
else
stack_limit.rlim_cur = 0;
}
/* Needed for OS/2 */
initialize_main (&argc, &argv);
#ifdef MAKE_MAINTAINER_MODE
/* In maintainer mode we always enable verification. */
verify_flag = 1;
#endif
/* Set up gettext/internationalization support. */
setlocale (LC_ALL, "");
/* The cast to void shuts up compiler warnings on systems that
disable NLS. */
(void)bindtextdomain (PACKAGE, LOCALEDIR);
(void)textdomain (PACKAGE);
sigemptyset (&fatal_signal_set);
#define ADD_SIG(sig) sigaddset (&fatal_signal_set, sig)
#define FATAL_SIG(sig) \
if (bsd_signal (sig, fatal_error_signal) == SIG_IGN) \
bsd_signal (sig, SIG_IGN); \
else \
ADD_SIG (sig);
FATAL_SIG (SIGHUP);
FATAL_SIG (SIGQUIT);
FATAL_SIG (SIGINT);
FATAL_SIG (SIGTERM);
FATAL_SIG (SIGXCPU);
FATAL_SIG (SIGXFSZ);
FATAL_SIG (SIGPIPE); /* [jart] handle case of piped into less */
#undef FATAL_SIG
#ifndef NDEBUG
ShowCrashReports();
#endif
/* Do not ignore the child-death signal. This must be done before
any children could possibly be created; otherwise, the wait
functions won't work on systems with the SVR4 ECHILD brain
damage, if our invoker is ignoring this signal. */
#ifdef HAVE_WAIT_NOHANG
# if defined SIGCHLD
(void) bsd_signal (SIGCHLD, SIG_DFL);
# endif
# if defined SIGCLD && SIGCLD != SIGCHLD
(void) bsd_signal (SIGCLD, SIG_DFL);
# endif
#endif
output_init (NULL);
/* Figure out where this program lives. */
if (argv[0] == 0)
argv[0] = (char *)"";
if (argv[0][0] == '\0')
program = "make";
else
{
#if defined(HAVE_DOS_PATHS)
const char* start = argv[0];
/* Skip an initial drive specifier if present. */
if (isalpha ((unsigned char)start[0]) && start[1] == ':')
start += 2;
if (start[0] == '\0')
program = "make";
else
{
program = start + strlen (start);
while (program > start && ! STOP_SET (program[-1], MAP_DIRSEP))
--program;
/* Remove the .exe extension if present. */
{
size_t len = strlen (program);
if (len > 4 && streq (&program[len - 4], ".exe"))
program = xstrndup (program, len - 4);
}
}
#else
program = strrchr (argv[0], '/');
if (program == 0)
program = argv[0];
else
++program;
#endif
}
/* Set up to access user data (files). */
user_access ();
initialize_global_hash_tables ();
/* Figure out where we are. */
if (getcwd (current_directory, GET_PATH_MAX) == 0)
{
#ifdef HAVE_GETCWD
perror_with_name ("getcwd", "");
#else
OS (error, NILF, "getwd: %s", current_directory);
#endif
current_directory[0] = '\0';
directory_before_chdir = 0;
}
else
directory_before_chdir = xstrdup (current_directory);
/* Initialize the special variables. */
define_variable_cname (".VARIABLES", "", o_default, 0)->special = 1;
/* define_variable_cname (".TARGETS", "", o_default, 0)->special = 1; */
define_variable_cname (".RECIPEPREFIX", "", o_default, 0)->special = 1;
define_variable_cname (".SHELLFLAGS", "-c", o_default, 0);
define_variable_cname (".LOADED", "", o_default, 0);
/* Set up .FEATURES
Use a separate variable because define_variable_cname() is a macro and
some compilers (MSVC) don't like conditionals in macros. */
{
const char *features = "target-specific order-only second-expansion"
" else-if shortest-stem undefine oneshell nocomment"
" grouped-target extra-prereqs"
#ifndef NO_ARCHIVES
" archives"
#endif
#ifdef MAKE_JOBSERVER
" jobserver"
#endif
#ifndef NO_OUTPUT_SYNC
" output-sync"
#endif
#ifdef MAKE_SYMLINKS
" check-symlink"
#endif
#ifdef MAKE_MAINTAINER_MODE
" maintainer"
#endif
;
define_variable_cname (".FEATURES", features, o_default, 0);
}
/* Configure GNU Guile support */
guile_gmake_setup (NILF);
/* Read in variables from the environment. It is important that this be
done before $(MAKE) is figured out so its definitions will not be
from the environment. */
{
unsigned int i;
for (i = 0; envp[i] != 0; ++i)
{
struct variable *v;
const char *ep = envp[i];
/* By default, export all variables culled from the environment. */
enum variable_export export = v_export;
size_t len;
while (! STOP_SET (*ep, MAP_EQUALS))
++ep;
/* If there's no equals sign it's a malformed environment. Ignore. */
if (*ep == '\0')
continue;
#ifdef WINDOWS32
if (!unix_path && strneq (envp[i], "PATH=", 5))
unix_path = ep+1;
else if (!strnicmp (envp[i], "Path=", 5))
{
if (!windows32_path)
windows32_path = ep+1;
/* PATH gets defined after the loop exits. */
continue;
}
#endif
/* Length of the variable name, and skip the '='. */
len = ep++ - envp[i];
/* If this is MAKE_RESTARTS, check to see if the "already printed
the enter statement" flag is set. */
if (len == 13 && strneq (envp[i], "MAKE_RESTARTS", 13))
{
if (*ep == '-')
{
OUTPUT_TRACED ();
++ep;
}
restarts = (unsigned int) atoi (ep);
export = v_noexport;
}
v = define_variable (envp[i], len, ep, o_env, 1);
/* POSIX says the value of SHELL set in the makefile won't change the
value of SHELL given to subprocesses. */
if (streq (v->name, "SHELL"))
{
export = v_noexport;
shell_var.name = xstrdup ("SHELL");
shell_var.length = 5;
shell_var.value = xstrdup (ep);
}
v->export = export;
}
}
#ifdef WINDOWS32
/* If we didn't find a correctly spelled PATH we define PATH as
* either the first misspelled value or an empty string
*/
if (!unix_path)
define_variable_cname ("PATH", windows32_path ? windows32_path : "",
o_env, 1)->export = v_export;
#endif
/* Decode the switches. */
decode_env_switches (STRING_SIZE_TUPLE ("GNUMAKEFLAGS"));
/* Clear GNUMAKEFLAGS to avoid duplication. */
define_variable_cname ("GNUMAKEFLAGS", "", o_env, 0);
decode_env_switches (STRING_SIZE_TUPLE ("MAKEFLAGS"));
#if 0
/* People write things like:
MFLAGS="CC=gcc -pipe" "CFLAGS=-g"
and we set the -p, -i and -e switches. Doesn't seem quite right. */
decode_env_switches (STRING_SIZE_TUPLE ("MFLAGS"));
#endif
/* In output sync mode we need to sync any output generated by reading the
makefiles, such as in $(info ...) or stderr from $(shell ...) etc. */
syncing = make_sync.syncout = (output_sync == OUTPUT_SYNC_LINE
|| output_sync == OUTPUT_SYNC_TARGET);
OUTPUT_SET (&make_sync);
/* Parse the command line options. Remember the job slots set this way. */
{
int env_slots = arg_job_slots;
arg_job_slots = INVALID_JOB_SLOTS;
decode_switches (argc, (const char **)argv, 0);
argv_slots = arg_job_slots;
if (arg_job_slots == INVALID_JOB_SLOTS)
arg_job_slots = env_slots;
}
/* Set a variable specifying whether stdout/stdin is hooked to a TTY. */
#ifdef HAVE_ISATTY
if (isatty (fileno (stdout)))
if (! lookup_variable (STRING_SIZE_TUPLE ("MAKE_TERMOUT")))
{
const char *tty = TTYNAME (fileno (stdout));
define_variable_cname ("MAKE_TERMOUT", tty ? tty : DEFAULT_TTYNAME,
o_default, 0)->export = v_export;
}
if (isatty (fileno (stderr)))
if (! lookup_variable (STRING_SIZE_TUPLE ("MAKE_TERMERR")))
{
const char *tty = TTYNAME (fileno (stderr));
define_variable_cname ("MAKE_TERMERR", tty ? tty : DEFAULT_TTYNAME,
o_default, 0)->export = v_export;
}
#endif
/* Reset in case the switches changed our minds. */
syncing = (output_sync == OUTPUT_SYNC_LINE
|| output_sync == OUTPUT_SYNC_TARGET);
if (make_sync.syncout && ! syncing)
output_close (&make_sync);
make_sync.syncout = syncing;
OUTPUT_SET (&make_sync);
/* Figure out the level of recursion. */
{
struct variable *v = lookup_variable (STRING_SIZE_TUPLE (MAKELEVEL_NAME));
if (v && v->value[0] != '\0' && v->value[0] != '-')
makelevel = (unsigned int) atoi (v->value);
else
makelevel = 0;
}
/* Set always_make_flag if -B was given and we've not restarted already. */
always_make_flag = always_make_set && (restarts == 0);
/* Print version information, and exit. */
if (print_version_flag)
{
print_version ();
die (MAKE_SUCCESS);
}
if (ISDB (DB_BASIC))
print_version ();
/* Set the "MAKE_COMMAND" variable to the name we were invoked with.
(If it is a relative pathname with a slash, prepend our directory name
so the result will run the same program regardless of the current dir.
If it is a name with no slash, we can only hope that PATH did not
find it in the current directory.) */
#ifdef WINDOWS32
/*
* Convert from backslashes to forward slashes for
* programs like sh which don't like them. Shouldn't
* matter if the path is one way or the other for
* CreateProcess().
*/
if (strpbrk (argv[0], "/:\\") || strstr (argv[0], "..")
|| strneq (argv[0], "//", 2))
argv[0] = xstrdup (w32ify (argv[0], 1));
#else /* WINDOWS32 */
if (current_directory[0] != '\0'
&& argv[0] != 0 && argv[0][0] != '/' && strchr (argv[0], '/') != 0
#ifdef HAVE_DOS_PATHS
&& (argv[0][0] != '\\' && (!argv[0][0] || argv[0][1] != ':'))
&& strchr (argv[0], '\\') != 0
#endif
)
argv[0] = xstrdup (concat (3, current_directory, "/", argv[0]));
#endif /* WINDOWS32 */
/* We may move, but until we do, here we are. */
starting_directory = current_directory;
/* Validate the arg_job_slots configuration before we define MAKEFLAGS so
users get an accurate value in their makefiles.
At this point arg_job_slots is the argv setting, if there is one, else
the MAKEFLAGS env setting, if there is one. */
if (jobserver_auth)
{
/* We're a child in an existing jobserver group. */
if (argv_slots == INVALID_JOB_SLOTS)
{
/* There's no -j option on the command line: check authorization. */
if (jobserver_parse_auth (jobserver_auth))
{
/* Success! Use the jobserver. */
goto job_setup_complete;
}
/* Oops: we have jobserver-auth but it's invalid :(. */
O (error, NILF, _("warning: jobserver unavailable: using -j1. Add '+' to parent make rule."));
arg_job_slots = 1;
}
/* The user provided a -j setting on the command line so use it: we're
the master make of a new jobserver group. */
else if (!restarts)
ON (error, NILF,
_("warning: -j%d forced in submake: resetting jobserver mode."),
argv_slots);
/* We can't use our parent's jobserver, so reset. */
reset_jobserver ();
}
job_setup_complete:
/* The extra indirection through $(MAKE_COMMAND) is done
for hysterical raisins. */
define_variable_cname ("MAKE_COMMAND", argv[0], o_default, 0);
define_variable_cname ("MAKE", "$(MAKE_COMMAND)", o_default, 1);
if (command_variables != 0)
{
struct command_variable *cv;
struct variable *v;
size_t len = 0;
char *value, *p;
/* Figure out how much space will be taken up by the command-line
variable definitions. */
for (cv = command_variables; cv != 0; cv = cv->next)
{
v = cv->variable;
len += 2 * strlen (v->name);
if (! v->recursive)
++len;
++len;
len += 2 * strlen (v->value);
++len;
}
/* Now allocate a buffer big enough and fill it. */
p = value = alloca (len);
for (cv = command_variables; cv != 0; cv = cv->next)
{
v = cv->variable;
p = quote_for_env (p, v->name);
if (! v->recursive)
*p++ = ':';
*p++ = '=';
p = quote_for_env (p, v->value);
*p++ = ' ';
}
p[-1] = '\0'; /* Kill the final space and terminate. */
/* Define an unchangeable variable with a name that no POSIX.2
makefile could validly use for its own variable. */
define_variable_cname ("-*-command-variables-*-", value, o_automatic, 0);
/* Define the variable; this will not override any user definition.
Normally a reference to this variable is written into the value of
MAKEFLAGS, allowing the user to override this value to affect the
exported value of MAKEFLAGS. In POSIX-pedantic mode, we cannot
allow the user's setting of MAKEOVERRIDES to affect MAKEFLAGS, so
a reference to this hidden variable is written instead. */
define_variable_cname ("MAKEOVERRIDES", "${-*-command-variables-*-}",
o_env, 1);
}
/* If there were -C flags, move ourselves about. */
if (directories != 0)
{
unsigned int i;
for (i = 0; directories->list[i] != 0; ++i)
{
const char *dir = directories->list[i];
#ifdef WINDOWS32
/* WINDOWS32 chdir() doesn't work if the directory has a trailing '/'
But allow -C/ just in case someone wants that. */
{
char *p = (char *)dir + strlen (dir) - 1;
while (p > dir && (p[0] == '/' || p[0] == '\\'))
--p;
p[1] = '\0';
}
#endif
if (chdir (dir) < 0)
pfatal_with_name (dir);
}
}
#ifdef WINDOWS32
/*
* THIS BLOCK OF CODE MUST COME AFTER chdir() CALL ABOVE IN ORDER
* TO NOT CONFUSE THE DEPENDENCY CHECKING CODE IN implicit.c.
*
* The functions in dir.c can incorrectly cache information for "."
* before we have changed directory and this can cause file
* lookups to fail because the current directory (.) was pointing
* at the wrong place when it was first evaluated.
*/
no_default_sh_exe = !find_and_set_default_shell (NULL);
#endif /* WINDOWS32 */
/* Except under -s, always do -w in sub-makes and under -C. */
if (!silent_flag && (directories != 0 || makelevel > 0))
print_directory_flag = 1;
/* Let the user disable that with --no-print-directory. */
if (inhibit_print_directory_flag)
print_directory_flag = 0;
/* If -R was given, set -r too (doesn't make sense otherwise!) */
if (no_builtin_variables_flag)
no_builtin_rules_flag = 1;
/* Construct the list of include directories to search. */
construct_include_path (include_directories == 0
? 0 : include_directories->list);
/* If we chdir'ed, figure out where we are now. */
if (directories)
{
#ifdef WINDOWS32
if (getcwd_fs (current_directory, GET_PATH_MAX) == 0)
#else
if (getcwd (current_directory, GET_PATH_MAX) == 0)
#endif
{
#ifdef HAVE_GETCWD
perror_with_name ("getcwd", "");
#else
OS (error, NILF, "getwd: %s", current_directory);
#endif
starting_directory = 0;
}
else
starting_directory = current_directory;
}
define_variable_cname ("CURDIR", current_directory, o_file, 0);
/* Read any stdin makefiles into temporary files. */
if (makefiles != 0)
{
unsigned int i;
for (i = 0; i < makefiles->idx; ++i)
if (makefiles->list[i][0] == '-' && makefiles->list[i][1] == '\0')
{
/* This makefile is standard input. Since we may re-exec
and thus re-read the makefiles, we read standard input
into a temporary file and read from that. */
FILE *outfile;
char *template;
const char *tmpdir;
if (stdin_nm)
O (fatal, NILF,
_("Makefile from standard input specified twice."));
#define DEFAULT_TMPDIR "/tmp"
#define DEFAULT_TMPFILE "GmXXXXXX"
if (((tmpdir = getenv ("TMPDIR")) == NULL || *tmpdir == '\0')
/* These are also used commonly on these platforms. */
&& ((tmpdir = getenv ("TEMP")) == NULL || *tmpdir == '\0')
&& ((tmpdir = getenv ("TMP")) == NULL || *tmpdir == '\0')
)
tmpdir = DEFAULT_TMPDIR;
template = alloca (strlen (tmpdir) + CSTRLEN (DEFAULT_TMPFILE) + 2);
strcpy (template, tmpdir);
#ifdef HAVE_DOS_PATHS
if (strchr ("/\\", template[strlen (template) - 1]) == NULL)
strcat (template, "/");
#else
if (template[strlen (template) - 1] != '/')
strcat (template, "/");
#endif /* !HAVE_DOS_PATHS */
strcat (template, DEFAULT_TMPFILE);
outfile = get_tmpfile (&stdin_nm, template);
if (outfile == 0)
pfatal_with_name (_("fopen (temporary file)"));
while (!feof (stdin) && ! ferror (stdin))
{
char buf[2048];
size_t n = fread (buf, 1, sizeof (buf), stdin);
if (n > 0 && fwrite (buf, 1, n, outfile) != n)
pfatal_with_name (_("fwrite (temporary file)"));
}
fclose (outfile);
/* Replace the name that read_all_makefiles will
see with the name of the temporary file. */
makefiles->list[i] = strcache_add (stdin_nm);
/* Make sure the temporary file will not be remade. */
{
struct file *f = enter_file (strcache_add (stdin_nm));
f->updated = 1;
f->update_status = us_success;
f->command_state = cs_finished;
/* Can't be intermediate, or it'll be removed too early for
make re-exec. */
f->intermediate = 0;
f->dontcare = 0;
}
}
}
#ifndef __EMX__ /* Don't use a SIGCHLD handler for OS/2 */
#if !defined(HAVE_WAIT_NOHANG) || defined(MAKE_JOBSERVER)
/* Set up to handle children dying. This must be done before
reading in the makefiles so that 'shell' function calls will work.
If we don't have a hanging wait we have to fall back to old, broken
functionality here and rely on the signal handler and counting
children.
If we're using the jobs pipe we need a signal handler so that SIGCHLD is
not ignored; we need it to interrupt the read(2) of the jobserver pipe if
we're waiting for a token.
If none of these are true, we don't need a signal handler at all. */
{
# if defined SIGCHLD
bsd_signal (SIGCHLD, child_handler);
# endif
# if defined SIGCLD && SIGCLD != SIGCHLD
bsd_signal (SIGCLD, child_handler);
# endif
}
#ifdef HAVE_PSELECT
/* If we have pselect() then we need to block SIGCHLD so it's deferred. */
{
sigset_t block;
sigemptyset (&block);
sigaddset (&block, SIGCHLD);
if (sigprocmask (SIG_SETMASK, &block, NULL) < 0)
pfatal_with_name ("sigprocmask(SIG_SETMASK, SIGCHLD)");
}
#endif
#endif
#endif
/* Let the user send us SIGUSR1 to toggle the -d flag during the run. */
bsd_signal (SIGUSR1, debug_signal_handler);
/* Define the initial list of suffixes for old-style rules. */
set_default_suffixes ();
/* Define the file rules for the built-in suffix rules. These will later
be converted into pattern rules. We used to do this in
install_default_implicit_rules, but since that happens after reading
makefiles, it results in the built-in pattern rules taking precedence
over makefile-specified suffix rules, which is wrong. */
install_default_suffix_rules ();
/* Define some internal and special variables. */
define_automatic_variables ();
/* Set up the MAKEFLAGS and MFLAGS variables for makefiles to see.
Initialize it to be exported but allow the makefile to reset it. */
define_makeflags (0, 0)->export = v_export;
/* Define the default variables. */
define_default_variables ();
default_file = enter_file (strcache_add (".DEFAULT"));
default_goal_var = define_variable_cname (".DEFAULT_GOAL", "", o_file, 0);
/* Evaluate all strings provided with --eval.
Also set up the $(-*-eval-flags-*-) variable. */
if (eval_strings)
{
char *p, *value;
unsigned int i;
size_t len = (CSTRLEN ("--eval=") + 1) * eval_strings->idx;
for (i = 0; i < eval_strings->idx; ++i)
{
p = xstrdup (eval_strings->list[i]);
len += 2 * strlen (p);
eval_buffer (p, NULL);
free (p);
}
p = value = alloca (len);
for (i = 0; i < eval_strings->idx; ++i)
{
strcpy (p, "--eval=");
p += CSTRLEN ("--eval=");
p = quote_for_env (p, eval_strings->list[i]);
*(p++) = ' ';
}
#pragma GCC push_options
#pragma GCC diagnostic ignored "-Wstringop-overflow" /* wut */
p[-1] = '\0';
#pragma GCC pop_options
define_variable_cname ("-*-eval-flags-*-", value, o_automatic, 0);
}
/* Read all the makefiles. */
read_files = read_all_makefiles (makefiles == 0 ? 0 : makefiles->list);
#ifdef WINDOWS32
/* look one last time after reading all Makefiles */
if (no_default_sh_exe)
no_default_sh_exe = !find_and_set_default_shell (NULL);
#endif /* WINDOWS32 */
{
int old_builtin_rules_flag = no_builtin_rules_flag;
int old_builtin_variables_flag = no_builtin_variables_flag;
int old_arg_job_slots = arg_job_slots;
arg_job_slots = INVALID_JOB_SLOTS;
/* Decode switches again, for variables set by the makefile. */
decode_env_switches (STRING_SIZE_TUPLE ("GNUMAKEFLAGS"));
/* Clear GNUMAKEFLAGS to avoid duplication. */
define_variable_cname ("GNUMAKEFLAGS", "", o_override, 0);
decode_env_switches (STRING_SIZE_TUPLE ("MAKEFLAGS"));
#if 0
decode_env_switches (STRING_SIZE_TUPLE ("MFLAGS"));
#endif
/* If -j is not set in the makefile, or it was set on the command line,
reset to use the previous value. */
if (arg_job_slots == INVALID_JOB_SLOTS || argv_slots != INVALID_JOB_SLOTS)
arg_job_slots = old_arg_job_slots;
else if (jobserver_auth)
{
/* Makefile MAKEFLAGS set -j, but we already have a jobserver.
Make us the master of a new jobserver group. */
if (!restarts)
ON (error, NILF,
_("warning: -j%d forced in makefile: resetting jobserver mode."),
arg_job_slots);
/* We can't use our parent's jobserver, so reset. */
reset_jobserver ();
}
/* Reset in case the switches changed our mind. */
syncing = (output_sync == OUTPUT_SYNC_LINE
|| output_sync == OUTPUT_SYNC_TARGET);
if (make_sync.syncout && ! syncing)
output_close (&make_sync);
make_sync.syncout = syncing;
OUTPUT_SET (&make_sync);
/* If we've disabled builtin rules, get rid of them. */
if (no_builtin_rules_flag && ! old_builtin_rules_flag)
{
if (suffix_file->builtin)
{
free_dep_chain (suffix_file->deps);
suffix_file->deps = 0;
}
define_variable_cname ("SUFFIXES", "", o_default, 0);
}
/* If we've disabled builtin variables, get rid of them. */
if (no_builtin_variables_flag && ! old_builtin_variables_flag)
undefine_default_variables ();
}
/* Final jobserver configuration.
If we have jobserver_auth then we are a client in an existing jobserver
group, that's already been verified OK above. If we don't have
jobserver_auth and jobserver is enabled, then start a new jobserver.
arg_job_slots = INVALID_JOB_SLOTS if we don't want -j in MAKEFLAGS
arg_job_slots = # of jobs of parallelism
job_slots = 0 for no limits on jobs, or when limiting via jobserver.
job_slots = 1 for standard non-parallel mode.
job_slots >1 for old-style parallelism without jobservers. */
if (jobserver_auth)
job_slots = 0;
else if (arg_job_slots == INVALID_JOB_SLOTS)
job_slots = 1;
else
job_slots = arg_job_slots;
/* If we have >1 slot at this point, then we're a top-level make.
Set up the jobserver.
Every make assumes that it always has one job it can run. For the
submakes it's the token they were given by their parent. For the top
make, we just subtract one from the number the user wants. */
if (job_slots > 1 && jobserver_setup (job_slots - 1))
{
/* Fill in the jobserver_auth for our children. */
jobserver_auth = jobserver_get_auth ();
if (jobserver_auth)
{
/* We're using the jobserver so set job_slots to 0. */
master_job_slots = job_slots;
job_slots = 0;
}
}
/* If we're not using parallel jobs, then we don't need output sync.
This is so people can enable output sync in GNUMAKEFLAGS or similar, but
not have it take effect unless parallel builds are enabled. */
if (syncing && job_slots == 1)
{
OUTPUT_UNSET ();
output_close (&make_sync);
syncing = 0;
output_sync = OUTPUT_SYNC_NONE;
}
#ifndef MAKE_SYMLINKS
if (check_symlink_flag)
{
O (error, NILF, _("Symbolic links not supported: disabling -L."));
check_symlink_flag = 0;
}
#endif
/* Set up MAKEFLAGS and MFLAGS again, so they will be right. */
define_makeflags (1, 0);
/* Make each 'struct goaldep' point at the 'struct file' for the file
depended on. Also do magic for special targets. */
snap_deps ();
/* Convert old-style suffix rules to pattern rules. It is important to
do this before installing the built-in pattern rules below, so that
makefile-specified suffix rules take precedence over built-in pattern
rules. */
convert_to_pattern ();
/* Install the default implicit pattern rules.
This used to be done before reading the makefiles.
But in that case, built-in pattern rules were in the chain
before user-defined ones, so they matched first. */
install_default_implicit_rules ();
/* Compute implicit rule limits and do magic for pattern rules. */
snap_implicit_rules ();
/* Construct the listings of directories in VPATH lists. */
build_vpath_lists ();
/* Mark files given with -o flags as very old and as having been updated
already, and files given with -W flags as brand new (time-stamp as far
as possible into the future). If restarts is set we'll do -W later. */
if (old_files != 0)
{
const char **p;
for (p = old_files->list; *p != 0; ++p)
{
struct file *f = enter_file (*p);
f->last_mtime = f->mtime_before_update = OLD_MTIME;
f->updated = 1;
f->update_status = us_success;
f->command_state = cs_finished;
}
}
if (!restarts && new_files != 0)
{
const char **p;
for (p = new_files->list; *p != 0; ++p)
{
struct file *f = enter_file (*p);
f->last_mtime = f->mtime_before_update = NEW_MTIME;
}
}
/* Initialize the remote job module. */
remote_setup ();
/* Dump any output we've collected. */
OUTPUT_UNSET ();
output_close (&make_sync);
if (read_files)
{
/* Update any makefiles if necessary. */
FILE_TIMESTAMP *makefile_mtimes;
char **aargv = NULL;
const char **nargv;
int nargc;
enum update_status status;
DB (DB_BASIC, (_("Updating makefiles....\n")));
{
struct goaldep *d;
unsigned int num_mkfiles = 0;
for (d = read_files; d != NULL; d = d->next)
++num_mkfiles;
makefile_mtimes = alloca (num_mkfiles * sizeof (FILE_TIMESTAMP));
}
/* Remove any makefiles we don't want to try to update. Record the
current modtimes of the others so we can compare them later. */
{
struct goaldep *d = read_files;
struct goaldep *last = NULL;
unsigned int mm_idx = 0;
while (d != 0)
{
struct file *f;
for (f = d->file->double_colon; f != NULL; f = f->prev)
if (f->deps == 0 && f->cmds != 0)
break;
if (f)
{
/* This makefile is a :: target with commands, but no
dependencies. So, it will always be remade. This might
well cause an infinite loop, so don't try to remake it.
(This will only happen if your makefiles are written
exceptionally stupidly; but if you work for Athena, that's
how you write your makefiles.) */
DB (DB_VERBOSE,
(_("Makefile '%s' might loop; not remaking it.\n"),
f->name));
if (last)
last->next = d->next;
else
read_files = d->next;
/* Free the storage. */
free_goaldep (d);
d = last ? last->next : read_files;
}
else
{
makefile_mtimes[mm_idx++] = file_mtime_no_search (d->file);
last = d;
d = d->next;
}
}
}
/* Set up 'MAKEFLAGS' specially while remaking makefiles. */
define_makeflags (1, 1);
{
int orig_db_level = db_level;
if (! ISDB (DB_MAKEFILES))
db_level = DB_NONE;
rebuilding_makefiles = 1;
status = update_goal_chain (read_files);
rebuilding_makefiles = 0;
db_level = orig_db_level;
}
switch (status)
{
case us_question:
/* The only way this can happen is if the user specified -q and asked
for one of the makefiles to be remade as a target on the command
line. Since we're not actually updating anything with -q we can
treat this as "did nothing". */
case us_none:
/* Did nothing. */
break;
case us_failed:
/* Failed to update. Figure out if we care. */
{
/* Nonzero if any makefile was successfully remade. */
int any_remade = 0;
/* Nonzero if any makefile we care about failed
in updating or could not be found at all. */
int any_failed = 0;
unsigned int i;
struct goaldep *d;
for (i = 0, d = read_files; d != 0; ++i, d = d->next)
{
if (d->file->updated)
{
/* This makefile was updated. */
if (d->file->update_status == us_success)
{
/* It was successfully updated. */
any_remade |= (file_mtime_no_search (d->file)
!= makefile_mtimes[i]);
}
else if (! (d->flags & RM_DONTCARE))
{
FILE_TIMESTAMP mtime;
/* The update failed and this makefile was not
from the MAKEFILES variable, so we care. */
OS (error, NILF, _("Failed to remake makefile '%s'."),
d->file->name);
mtime = file_mtime_no_search (d->file);
any_remade |= (mtime != NONEXISTENT_MTIME
&& mtime != makefile_mtimes[i]);
makefile_status = MAKE_FAILURE;
}
}
else
/* This makefile was not found at all. */
if (! (d->flags & RM_DONTCARE))
{
const char *dnm = dep_name (d);
size_t l = strlen (dnm);
/* This is a makefile we care about. See how much. */
if (d->flags & RM_INCLUDED)
/* An included makefile. We don't need to die, but we
do want to complain. */
error (NILF, l,
_("Included makefile '%s' was not found."), dnm);
else
{
/* A normal makefile. We must die later. */
error (NILF, l,
_("Makefile '%s' was not found"), dnm);
any_failed = 1;
}
}
}
if (any_remade)
goto re_exec;
if (any_failed)
die (MAKE_FAILURE);
break;
}
case us_success:
re_exec:
/* Updated successfully. Re-exec ourselves. */
remove_intermediates (0);
if (print_data_base_flag)
print_data_base ();
clean_jobserver (0);
if (makefiles != 0)
{
/* These names might have changed. */
int i, j = 0;
for (i = 1; i < argc; ++i)
if (strneq (argv[i], "-f", 2)) /* XXX */
{
if (argv[i][2] == '\0')
/* This cast is OK since we never modify argv. */
argv[++i] = (char *) makefiles->list[j];
else
argv[i] = xstrdup (concat (2, "-f", makefiles->list[j]));
++j;
}
}
/* Add -o option for the stdin temporary file, if necessary. */
nargc = argc;
if (stdin_nm)
{
void *m = xmalloc ((nargc + 2) * sizeof (char *));
aargv = m;
memcpy (aargv, argv, argc * sizeof (char *));
aargv[nargc++] = xstrdup (concat (2, "-o", stdin_nm));
aargv[nargc] = 0;
nargv = m;
}
else
nargv = (const char**)argv;
if (directories != 0 && directories->idx > 0)
{
int bad = 1;
if (directory_before_chdir != 0)
{
if (chdir (directory_before_chdir) < 0)
perror_with_name ("chdir", "");
else
bad = 0;
}
if (bad)
O (fatal, NILF,
_("Couldn't change back to original directory."));
}
++restarts;
if (ISDB (DB_BASIC))
{
const char **p;
printf (_("Re-executing[%u]:"), restarts);
for (p = nargv; *p != 0; ++p)
printf (" %s", *p);
putchar ('\n');
fflush (stdout);
}
{
char **p;
for (p = environ; *p != 0; ++p)
{
if (strneq (*p, MAKELEVEL_NAME "=", MAKELEVEL_LENGTH+1))
{
*p = alloca (40);
sprintf (*p, "%s=%u", MAKELEVEL_NAME, makelevel);
}
else if (strneq (*p, "MAKE_RESTARTS=", CSTRLEN ("MAKE_RESTARTS=")))
{
*p = alloca (40);
sprintf (*p, "MAKE_RESTARTS=%s%u",
OUTPUT_IS_TRACED () ? "-" : "", restarts);
restarts = 0;
}
}
}
/* If we didn't set the restarts variable yet, add it. */
if (restarts)
{
char *b = alloca (40);
sprintf (b, "MAKE_RESTARTS=%s%u",
OUTPUT_IS_TRACED () ? "-" : "", restarts);
putenv (b);
}
fflush (stdout);
fflush (stderr);
/* The exec'd "child" will be another make, of course. */
jobserver_pre_child(1);
/* Reset limits, if necessary. */
if (stack_limit.rlim_cur)
setrlimit (RLIMIT_STACK, &stack_limit);
exec_command ((char **)nargv, environ);
/* We shouldn't get here but just in case. */
jobserver_post_child(1);
free (aargv);
break;
}
}
/* Set up 'MAKEFLAGS' again for the normal targets. */
define_makeflags (1, 0);
/* Set always_make_flag if -B was given. */
always_make_flag = always_make_set;
/* If restarts is set we haven't set up -W files yet, so do that now. */
if (restarts && new_files != 0)
{
const char **p;
for (p = new_files->list; *p != 0; ++p)
{
struct file *f = enter_file (*p);
f->last_mtime = f->mtime_before_update = NEW_MTIME;
}
}
/* If there is a temp file from reading a makefile from stdin, get rid of
it now. */
if (stdin_nm && unlink (stdin_nm) < 0 && errno != ENOENT)
perror_with_name (_("unlink (temporary file): "), stdin_nm);
/* If there were no command-line goals, use the default. */
if (goals == 0)
{
char *p;
if (default_goal_var->recursive)
p = variable_expand (default_goal_var->value);
else
{
p = variable_buffer_output (variable_buffer, default_goal_var->value,
strlen (default_goal_var->value));
*p = '\0';
p = variable_buffer;
}
if (*p != '\0')
{
struct file *f = lookup_file (p);
/* If .DEFAULT_GOAL is a non-existent target, enter it into the
table and let the standard logic sort it out. */
if (f == 0)
{
struct nameseq *ns;
ns = PARSE_SIMPLE_SEQ (&p, struct nameseq);
if (ns)
{
/* .DEFAULT_GOAL should contain one target. */
if (ns->next != 0)
O (fatal, NILF,
_(".DEFAULT_GOAL contains more than one target"));
f = enter_file (strcache_add (ns->name));
ns->name = 0; /* It was reused by enter_file(). */
free_ns_chain (ns);
}
}
if (f)
{
goals = alloc_goaldep ();
goals->file = f;
}
}
}
else
lastgoal->next = 0;
if (!goals)
{
struct variable *v = lookup_variable (STRING_SIZE_TUPLE ("MAKEFILE_LIST"));
if (v && v->value && v->value[0] != '\0')
O (fatal, NILF, _("No targets"));
O (fatal, NILF, _("No targets specified and no makefile found"));
}
/* Update the goals. */
DB (DB_BASIC, (_("Updating goal targets....\n")));
{
switch (update_goal_chain (goals))
{
case us_none:
/* Nothing happened. */
/* FALLTHROUGH */
case us_success:
/* Keep the previous result. */
break;
case us_question:
/* We are under -q and would run some commands. */
makefile_status = MAKE_TROUBLE;
break;
case us_failed:
/* Updating failed. POSIX.2 specifies exit status >1 for this; */
makefile_status = MAKE_FAILURE;
break;
}
/* If we detected some clock skew, generate one last warning */
if (clock_skew_detected)
O (error, NILF,
_("warning: Clock skew detected. Your build may be incomplete."));
/* Exit. */
die (makefile_status);
}
/* NOTREACHED */
exit (MAKE_SUCCESS);
}
/* Parsing of arguments, decoding of switches. */
static char options[1 + sizeof (switches) / sizeof (switches[0]) * 3];
static struct option long_options[(sizeof (switches) / sizeof (switches[0])) +
(sizeof (long_option_aliases) /
sizeof (long_option_aliases[0]))];
/* Fill in the string and vector for getopt. */
static void
init_switches (void)
{
char *p;
unsigned int c;
unsigned int i;
if (options[0] != '\0')
/* Already done. */
return;
p = options;
/* Return switch and non-switch args in order, regardless of
POSIXLY_CORRECT. Non-switch args are returned as option 1. */
*p++ = '-';
for (i = 0; switches[i].c != '\0'; ++i)
{
long_options[i].name = (char *) (switches[i].long_name == 0 ? "" :
switches[i].long_name);
long_options[i].flag = 0;
long_options[i].val = switches[i].c;
if (short_option (switches[i].c))
*p++ = (char) switches[i].c;
switch (switches[i].type)
{
case flag:
case flag_off:
case ignore:
long_options[i].has_arg = no_argument;
break;
case string:
case strlist:
case filename:
case positive_int:
case floating:
if (short_option (switches[i].c))
*p++ = ':';
if (switches[i].noarg_value != 0)
{
if (short_option (switches[i].c))
*p++ = ':';
long_options[i].has_arg = optional_argument;
}
else
long_options[i].has_arg = required_argument;
break;
}
}
*p = '\0';
for (c = 0; c < (sizeof (long_option_aliases) /
sizeof (long_option_aliases[0]));
++c)
long_options[i++] = long_option_aliases[c];
long_options[i].name = 0;
}
/* Non-option argument. It might be a variable definition. */
static void
handle_non_switch_argument (const char *arg, int env)
{
struct variable *v;
if (arg[0] == '-' && arg[1] == '\0')
/* Ignore plain '-' for compatibility. */
return;
v = try_variable_definition (0, arg, o_command, 0);
if (v != 0)
{
/* It is indeed a variable definition. If we don't already have this
one, record a pointer to the variable for later use in
define_makeflags. */
struct command_variable *cv;
for (cv = command_variables; cv != 0; cv = cv->next)
if (cv->variable == v)
break;
if (! cv)
{
cv = xmalloc (sizeof (*cv));
cv->variable = v;
cv->next = command_variables;
command_variables = cv;
}
}
else if (! env)
{
/* Not an option or variable definition; it must be a goal
target! Enter it as a file and add it to the dep chain of
goals. */
struct file *f = enter_file (strcache_add (expand_command_line_file (arg)));
f->cmd_target = 1;
if (goals == 0)
{
goals = alloc_goaldep ();
lastgoal = goals;
}
else
{
lastgoal->next = alloc_goaldep ();
lastgoal = lastgoal->next;
}
lastgoal->file = f;
{
/* Add this target name to the MAKECMDGOALS variable. */
struct variable *gv;
const char *value;
gv = lookup_variable (STRING_SIZE_TUPLE ("MAKECMDGOALS"));
if (gv == 0)
value = f->name;
else
{
/* Paste the old and new values together */
size_t oldlen, newlen;
char *vp;
oldlen = strlen (gv->value);
newlen = strlen (f->name);
vp = alloca (oldlen + 1 + newlen + 1);
memcpy (vp, gv->value, oldlen);
vp[oldlen] = ' ';
memcpy (&vp[oldlen + 1], f->name, newlen + 1);
value = vp;
}
define_variable_cname ("MAKECMDGOALS", value, o_default, 0);
}
}
}
/* Print a nice usage method. */
static void
print_usage (int bad)
{
const char *const *cpp;
FILE *usageto;
if (print_version_flag)
print_version ();
usageto = bad ? stderr : stdout;
fprintf (usageto, _("Usage: %s [options] [target] ...\n"), program);
for (cpp = usage; *cpp; ++cpp)
fputs (_(*cpp), usageto);
if (!remote_description || *remote_description == '\0')
fprintf (usageto, _("\nThis program built for %s\n"), make_host);
else
fprintf (usageto, _("\nThis program built for %s (%s)\n"),
make_host, remote_description);
fprintf (usageto, _("Report bugs to <bug-make@gnu.org>\n"));
}
/* Decode switches from ARGC and ARGV.
They came from the environment if ENV is nonzero. */
static void
decode_switches (int argc, const char **argv, int env)
{
int bad = 0;
const struct command_switch *cs;
struct stringlist *sl;
int c;
/* getopt does most of the parsing for us.
First, get its vectors set up. */
init_switches ();
/* Let getopt produce error messages for the command line,
but not for options from the environment. */
opterr = !env;
/* Reset getopt's state. */
optind = 0;
while (optind < argc)
{
const char *coptarg;
/* Parse the next argument. */
c = getopt_long (argc, (char*const*)argv, options, long_options, NULL);
coptarg = optarg;
if (c == EOF)
/* End of arguments, or "--" marker seen. */
break;
else if (c == 1)
/* An argument not starting with a dash. */
handle_non_switch_argument (coptarg, env);
else if (c == '?')
/* Bad option. We will print a usage message and die later.
But continue to parse the other options so the user can
see all he did wrong. */
bad = 1;
else
for (cs = switches; cs->c != '\0'; ++cs)
if (cs->c == c)
{
/* Whether or not we will actually do anything with
this switch. We test this individually inside the
switch below rather than just once outside it, so that
options which are to be ignored still consume args. */
int doit = !env || cs->env;
switch (cs->type)
{
default:
abort ();
case ignore:
break;
case flag:
case flag_off:
if (doit)
*(int *) cs->value_ptr = cs->type == flag;
break;
case string:
case strlist:
case filename:
if (!doit)
break;
if (! coptarg)
coptarg = xstrdup (cs->noarg_value);
else if (*coptarg == '\0')
{
char opt[2] = "c";
const char *op = opt;
if (short_option (cs->c))
opt[0] = (char) cs->c;
else
op = cs->long_name;
error (NILF, strlen (op),
_("the '%s%s' option requires a non-empty string argument"),
short_option (cs->c) ? "-" : "--", op);
bad = 1;
break;
}
if (cs->type == string)
{
char **val = (char **)cs->value_ptr;
free (*val);
*val = xstrdup (coptarg);
break;
}
sl = *(struct stringlist **) cs->value_ptr;
if (sl == 0)
{
sl = xmalloc (sizeof (struct stringlist));
sl->max = 5;
sl->idx = 0;
sl->list = xmalloc (5 * sizeof (char *));
*(struct stringlist **) cs->value_ptr = sl;
}
else if (sl->idx == sl->max - 1)
{
sl->max += 5;
/* MSVC erroneously warns without a cast here. */
sl->list = xrealloc ((void *)sl->list,
sl->max * sizeof (char *));
}
if (cs->type == filename)
sl->list[sl->idx++] = expand_command_line_file (coptarg);
else
sl->list[sl->idx++] = xstrdup (coptarg);
sl->list[sl->idx] = 0;
break;
case positive_int:
/* See if we have an option argument; if we do require that
it's all digits, not something like "10foo". */
if (coptarg == 0 && argc > optind)
{
const char *cp;
for (cp=argv[optind]; ISDIGIT (cp[0]); ++cp)
;
if (cp[0] == '\0')
coptarg = argv[optind++];
}
if (!doit)
break;
if (coptarg)
{
int i = atoi (coptarg);
const char *cp;
/* Yes, I realize we're repeating this in some cases. */
for (cp = coptarg; ISDIGIT (cp[0]); ++cp)
;
if (i < 1 || cp[0] != '\0')
{
error (NILF, 0,
_("the '-%c' option requires a positive integer argument"),
cs->c);
bad = 1;
}
else
*(unsigned int *) cs->value_ptr = i;
}
else
*(unsigned int *) cs->value_ptr
= *(unsigned int *) cs->noarg_value;
break;
case floating:
if (coptarg == 0 && optind < argc
&& (ISDIGIT (argv[optind][0]) || argv[optind][0] == '.'))
coptarg = argv[optind++];
if (doit)
*(double *) cs->value_ptr
= (coptarg != 0 ? atof (coptarg)
: *(double *) cs->noarg_value);
break;
}
/* We've found the switch. Stop looking. */
break;
}
}
/* There are no more options according to getting getopt, but there may
be some arguments left. Since we have asked for non-option arguments
to be returned in order, this only happens when there is a "--"
argument to prevent later arguments from being options. */
while (optind < argc)
handle_non_switch_argument (argv[optind++], env);
if (!env && (bad || print_usage_flag))
{
print_usage (bad);
die (bad ? MAKE_FAILURE : MAKE_SUCCESS);
}
/* If there are any options that need to be decoded do it now. */
decode_debug_flags ();
decode_output_sync_flags ();
/* Perform any special switch handling. */
run_silent = silent_flag;
}
/* Decode switches from environment variable ENVAR (which is LEN chars long).
We do this by chopping the value into a vector of words, prepending a
dash to the first word if it lacks one, and passing the vector to
decode_switches. */
static void
decode_env_switches (const char *envar, size_t len)
{
char *varref = alloca (2 + len + 2);
char *value, *p, *buf;
int argc;
const char **argv;
/* Get the variable's value. */
varref[0] = '$';
varref[1] = '(';
memcpy (&varref[2], envar, len);
varref[2 + len] = ')';
varref[2 + len + 1] = '\0';
value = variable_expand (varref);
/* Skip whitespace, and check for an empty value. */
NEXT_TOKEN (value);
len = strlen (value);
if (len == 0)
return;
/* Allocate a vector that is definitely big enough. */
argv = alloca ((1 + len + 1) * sizeof (char *));
/* getopt will look at the arguments starting at ARGV[1].
Prepend a spacer word. */
argv[0] = 0;
argc = 1;
/* We need a buffer to copy the value into while we split it into words
and unquote it. Set up in case we need to prepend a dash later. */
buf = alloca (1 + len + 1);
buf[0] = '-';
p = buf+1;
argv[argc] = p;
while (*value != '\0')
{
if (*value == '\\' && value[1] != '\0')
++value; /* Skip the backslash. */
else if (ISBLANK (*value))
{
/* End of the word. */
*p++ = '\0';
argv[++argc] = p;
do
++value;
while (ISBLANK (*value));
continue;
}
*p++ = *value++;
}
*p = '\0';
argv[++argc] = 0;
assert (p < buf + len + 2);
if (argv[1][0] != '-' && strchr (argv[1], '=') == 0)
/* The first word doesn't start with a dash and isn't a variable
definition, so add a dash. */
argv[1] = buf;
/* Parse those words. */
decode_switches (argc, argv, 1);
}
/* Quote the string IN so that it will be interpreted as a single word with
no magic by decode_env_switches; also double dollar signs to avoid
variable expansion in make itself. Write the result into OUT, returning
the address of the next character to be written.
Allocating space for OUT twice the length of IN is always sufficient. */
static char *
quote_for_env (char *out, const char *in)
{
while (*in != '\0')
{
if (*in == '$')
*out++ = '$';
else if (ISBLANK (*in) || *in == '\\')
*out++ = '\\';
*out++ = *in++;
}
return out;
}
/* Define the MAKEFLAGS and MFLAGS variables to reflect the settings of the
command switches. Include options with args if ALL is nonzero.
Don't include options with the 'no_makefile' flag set if MAKEFILE. */
static struct variable *
define_makeflags (int all, int makefile)
{
const char ref[] = "MAKEOVERRIDES";
const char posixref[] = "-*-command-variables-*-";
const char evalref[] = "$(-*-eval-flags-*-)";
const struct command_switch *cs;
char *flagstring;
char *p;
/* We will construct a linked list of 'struct flag's describing
all the flags which need to go in MAKEFLAGS. Then, once we
know how many there are and their lengths, we can put them all
together in a string. */
struct flag
{
struct flag *next;
const struct command_switch *cs;
const char *arg;
};
struct flag *flags = 0;
struct flag *last = 0;
size_t flagslen = 0;
#define ADD_FLAG(ARG, LEN) \
do { \
struct flag *new = alloca (sizeof (struct flag)); \
new->cs = cs; \
new->arg = (ARG); \
new->next = 0; \
if (! flags) \
flags = new; \
else \
last->next = new; \
last = new; \
if (new->arg == 0) \
/* Just a single flag letter: " -x" */ \
flagslen += 3; \
else \
/* " -xfoo", plus space to escape "foo". */ \
flagslen += 1 + 1 + 1 + (3 * (LEN)); \
if (!short_option (cs->c)) \
/* This switch has no single-letter version, so we use the long. */ \
flagslen += 2 + strlen (cs->long_name); \
} while (0)
for (cs = switches; cs->c != '\0'; ++cs)
if (cs->toenv && (!makefile || !cs->no_makefile))
switch (cs->type)
{
case ignore:
break;
case flag:
case flag_off:
if ((!*(int *) cs->value_ptr) == (cs->type == flag_off)
&& (cs->default_value == 0
|| *(int *) cs->value_ptr != *(int *) cs->default_value))
ADD_FLAG (0, 0);
break;
case positive_int:
if (all)
{
if ((cs->default_value != 0
&& (*(unsigned int *) cs->value_ptr
== *(unsigned int *) cs->default_value)))
break;
else if (cs->noarg_value != 0
&& (*(unsigned int *) cs->value_ptr ==
*(unsigned int *) cs->noarg_value))
ADD_FLAG ("", 0); /* Optional value omitted; see below. */
else
{
char *buf = alloca (30);
sprintf (buf, "%u", *(unsigned int *) cs->value_ptr);
ADD_FLAG (buf, strlen (buf));
}
}
break;
case floating:
if (all)
{
if (cs->default_value != 0
&& (*(double *) cs->value_ptr
== *(double *) cs->default_value))
break;
else if (cs->noarg_value != 0
&& (*(double *) cs->value_ptr
== *(double *) cs->noarg_value))
ADD_FLAG ("", 0); /* Optional value omitted; see below. */
else
{
char *buf = alloca (100);
sprintf (buf, "%g", *(double *) cs->value_ptr);
ADD_FLAG (buf, strlen (buf));
}
}
break;
case string:
if (all)
{
p = *((char **)cs->value_ptr);
if (p)
ADD_FLAG (p, strlen (p));
}
break;
case filename:
case strlist:
if (all)
{
struct stringlist *sl = *(struct stringlist **) cs->value_ptr;
if (sl != 0)
{
unsigned int i;
for (i = 0; i < sl->idx; ++i)
ADD_FLAG (sl->list[i], strlen (sl->list[i]));
}
}
break;
default:
abort ();
}
#undef ADD_FLAG
/* Four more for the possible " -- ", plus variable references. */
flagslen += 4 + CSTRLEN (posixref) + 4 + CSTRLEN (evalref) + 4;
/* Construct the value in FLAGSTRING.
We allocate enough space for a preceding dash and trailing null. */
flagstring = alloca (1 + flagslen + 1);
memset (flagstring, '\0', 1 + flagslen + 1);
p = flagstring;
/* Start with a dash, for MFLAGS. */
*p++ = '-';
/* Add simple options as a group. */
while (flags != 0 && !flags->arg && short_option (flags->cs->c))
{
*p++ = (char) flags->cs->c;
flags = flags->next;
}
/* Now add more complex flags: ones with options and/or long names. */
while (flags)
{
*p++ = ' ';
*p++ = '-';
/* Add the flag letter or name to the string. */
if (short_option (flags->cs->c))
*p++ = (char) flags->cs->c;
else
{
/* Long options require a double-dash. */
*p++ = '-';
strcpy (p, flags->cs->long_name);
p += strlen (p);
}
/* An omitted optional argument has an ARG of "". */
if (flags->arg && flags->arg[0] != '\0')
{
if (!short_option (flags->cs->c))
/* Long options require '='. */
*p++ = '=';
p = quote_for_env (p, flags->arg);
}
flags = flags->next;
}
/* If no flags at all, get rid of the initial dash. */
if (p == &flagstring[1])
{
flagstring[0] = '\0';
p = flagstring;
}
/* Define MFLAGS before appending variable definitions. Omit an initial
empty dash. Since MFLAGS is not parsed for flags, there is no reason to
override any makefile redefinition. */
define_variable_cname ("MFLAGS",
flagstring + (flagstring[0] == '-' && flagstring[1] == ' ' ? 2 : 0),
o_env, 1);
/* Write a reference to -*-eval-flags-*-, which contains all the --eval
flag options. */
if (eval_strings)
{
*p++ = ' ';
memcpy (p, evalref, CSTRLEN (evalref));
p += CSTRLEN (evalref);
}
if (all)
{
/* If there are any overrides to add, write a reference to
$(MAKEOVERRIDES), which contains command-line variable definitions.
Separate the variables from the switches with a "--" arg. */
const char *r = posix_pedantic ? posixref : ref;
size_t l = strlen (r);
struct variable *v = lookup_variable (r, l);
if (v && v->value && v->value[0] != '\0')
{
strcpy (p, " -- ");
p += 4;
*(p++) = '$';
*(p++) = '(';
memcpy (p, r, l);
p += l;
*(p++) = ')';
}
}
/* If there is a leading dash, omit it. */
if (flagstring[0] == '-')
++flagstring;
/* This used to use o_env, but that lost when a makefile defined MAKEFLAGS.
Makefiles set MAKEFLAGS to add switches, but we still want to redefine
its value with the full set of switches. Then we used o_file, but that
lost when users added -e, causing a previous MAKEFLAGS env. var. to take
precedence over the new one. Of course, an override or command
definition will still take precedence. */
return define_variable_cname ("MAKEFLAGS", flagstring,
env_overrides ? o_env_override : o_file, 1);
}
/* Print version information. */
static void
print_version (void)
{
static int printed_version = 0;
const char *precede = print_data_base_flag ? "# " : "";
if (printed_version)
/* Do it only once. */
return;
printf ("%sLandlock Make " LANDLOCKMAKE_VERSION " (GNU Make %s)\n",
precede, version_string);
if (!remote_description || *remote_description == '\0')
printf (_("%sBuilt for %s\n"), precede, make_host);
else
printf (_("%sBuilt for %s (%s)\n"),
precede, make_host, remote_description);
/* Print this untranslated. The coding standards recommend translating the
(C) to the copyright symbol, but this string is going to change every
year, and none of the rest of it should be translated (including the
word "Copyright"), so it hardly seems worth it. */
printf ("%sCopyright (C) 2022 Justine Alexandra Roberts Tunney\n",
precede);
printf ("%sCopyright (C) 1988-2020 Free Software Foundation, Inc.\n",
precede);
printf (_("%sLicense GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\
%sThis is free software: you are free to change and redistribute it.\n\
%sThere is NO WARRANTY, to the extent permitted by law.\n"),
precede, precede, precede);
printed_version = 1;
/* Flush stdout so the user doesn't have to wait to see the
version information while make thinks about things. */
fflush (stdout);
}
/* Print a bunch of information about this and that. */
static void
print_data_base (void)
{
time_t when = time ((time_t *) 0);
print_version ();
printf (_("\n# Make data base, printed on %s"), ctime (&when));
print_variable_data_base ();
print_dir_data_base ();
print_rule_data_base ();
print_file_data_base ();
print_vpath_data_base ();
strcache_print_stats ("#");
when = time ((time_t *) 0);
printf (_("\n# Finished Make data base on %s\n"), ctime (&when));
}
static void
clean_jobserver (int status)
{
/* Sanity: have we written all our jobserver tokens back? If our
exit status is 2 that means some kind of syntax error; we might not
have written all our tokens so do that now. If tokens are left
after any other error code, that's bad. */
if (jobserver_enabled() && jobserver_tokens)
{
if (status != 2)
ON (error, NILF,
"INTERNAL: Exiting with %u jobserver tokens (should be 0)!",
jobserver_tokens);
else
/* Don't write back the "free" token */
while (--jobserver_tokens)
jobserver_release (0);
}
/* Sanity: If we're the master, were all the tokens written back? */
if (master_job_slots)
{
/* We didn't write one for ourself, so start at 1. */
unsigned int tokens = 1 + jobserver_acquire_all ();
if (tokens != master_job_slots)
ONN (error, NILF,
"INTERNAL: Exiting with %u jobserver tokens available; should be %u!",
tokens, master_job_slots);
reset_jobserver ();
}
}
/* Exit with STATUS, cleaning up as necessary. */
void
die (int status)
{
static char dying = 0;
if (!dying)
{
int err;
dying = 1;
if (print_version_flag)
print_version ();
/* Wait for children to die. */
err = (status != 0);
while (job_slots_used > 0)
reap_children (1, err);
/* Let the remote job module clean up its state. */
remote_cleanup ();
/* Remove the intermediate files. */
remove_intermediates (0);
if (print_data_base_flag)
print_data_base ();
if (verify_flag)
verify_file_data_base ();
clean_jobserver (status);
if (output_context)
{
/* die() might be called in a recipe output context due to an
$(error ...) function. */
output_close (output_context);
if (output_context != &make_sync)
output_close (&make_sync);
OUTPUT_UNSET ();
}
output_close (NULL);
/* Try to move back to the original directory. This is essential on
MS-DOS (where there is really only one process), and on Unix it
puts core files in the original directory instead of the -C
directory. Must wait until after remove_intermediates(), or unlinks
of relative pathnames fail. */
if (directory_before_chdir != 0)
{
/* If it fails we don't care: shut up GCC. */
int _x UNUSED;
_x = chdir (directory_before_chdir);
}
}
exit (status);
}
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