Make more fixes and improvements

- Remove PAGESIZE constant
- Fix realloc() documentation
- Fix ttyname_r() error reporting
- Make forking more reliable on Windows
- Make execvp() a few microseconds faster
- Make system() a few microseconds faster
- Tighten up the socket-related magic numbers
- Loosen restrictions on mmap() offset alignment
- Improve GetProgramExecutableName() with getenv("_")
- Use mkstemp() as basis for mktemp(), tmpfile(), tmpfd()
- Fix flakes in pthread_cancel_test, unix_test, fork_test
- Fix recently introduced futex stack overflow regression
- Let sockets be passed as stdio to subprocesses on Windows
- Improve security of bind() on Windows w/ SO_EXCLUSIVEADDRUSE

third_party/make/file.c

@@ -1140,7 +1140,8 @@ build_target_list (char *value)
 void
 init_hash_files (void)
 {
-  hash_init (&files, 1000, file_hash_1, file_hash_2, file_hash_cmp);
+  // [jart] increased from 1000
+  hash_init (&files, 32768, file_hash_1, file_hash_2, file_hash_cmp);
 }
 
 /* EOF */

third_party/make/findprog.h

@@ -1,5 +1,4 @@
 /* clang-format off */
-/* clang-format off */
 /* Locating a program in PATH.
    Copyright (C) 2001-2003, 2009-2020 Free Software Foundation, Inc.
    Written by Bruno Haible <haible@clisp.cons.org>, 2001.

third_party/make/job.c

@@ -2375,7 +2375,7 @@ exec_command (char **argv, char **envp)
 
   /* Run the program.  */
   environ = envp;
-  execv (argv[0], argv);
+  execvp (argv[0], argv);
 
   if(errno == ENOENT)
     OSS (error, NILF, "%s: command doesn't exist: %s",

third_party/make/main.c

@@ -1036,6 +1036,10 @@ main (int argc, char **argv, char **envp)
 
 #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

third_party/make/strcache.c

@@ -253,7 +253,8 @@ strcache_add_len (const char *str, size_t len)
 void
 strcache_init (void)
 {
-  hash_init (&strings, 8000, str_hash_1, str_hash_2, str_hash_cmp);
+  // [jart] increased from 8000
+  hash_init (&strings, 131072, str_hash_1, str_hash_2, str_hash_cmp);
 }