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cosmopolitan/build/definitions.mk
Justine Tunney 4778cd4d27
Fix bugs in termios library and cleanup code 
This change fixes an issue with the tcflow() magic numbers that was
causing bash to freeze up on Linux. While auditing termios polyfills,
several other issues were identified with XNU/BSD compatibility.

Out of an abundance of caution this change undefines as much surface
area from libc/calls/struct/termios.h as possible, so that autoconf
scripts are less likely to detect non-POSIX teletypewriter APIs that
haven't been polyfilled by Cosmopolitan.

This is a *breaking change* for your static archives in /opt/cosmos if
you use the cosmocc toolchain. That's because this change disables the
ioctl() undiamonding trick for code outside the monorepo, specifically
because it'll lead to brittle ABI breakages like this. If you're using
the cosmocc toolchain, you'll need to rebuild libraries like ncurses,
readline, etc. Yes diamonds cause bloat. To work around that, consider
using tcgetwinsize() instead of ioctl(TIOCGWINSZ) since it'll help you
avoid pulling every single ioctl-related polyfill into the linkage.

The cosmocc script was specifying -DNDEBUG for some reason. It's fixed.
2023-06-14 19:30:52 -07:00

454 lines
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Makefile
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#-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
#───vi: set et ft=make ts=8 tw=8 fenc=utf-8 :vi───────────────────────┘
#
# SYNOPSIS
#
# Cosmopolitan Core Build Definitions
#
# DESCRIPTION
#
# Nearly all compiler flag tuning is done within this one file. Flags
# may be customized with environment variables. We also use this file
# to compute expensive values once per build.
#
# When tuning the variables below, please note they're interpreted in
# the strictest sense. For example, we don't pass CFLAGS to gcc if we
# know it's compiling a .S file. This enables our `make V=0` logging
# to be succinct and informative at the cost of being less forgiving.
#
# Further note that link order is equally unforgiving in repositories
# of this scale. We approach that by over-specifying dependencies, in
# packages that're broken down usually on a per-directory basis. This
# is aided by the checkdeps and functional programming tools which in
# most cases should be able to deduce correct ordering automatically.
#
# Concerning our approach to flag tuning, most of it is non-essential
# and largely serves to turn features off. Particularly features that
# would otherwise lock us in to a particular platform or legal terms.
# Other flags will usually be the ones that provide us marginal gains
# in terms of performance and code size, but the world won't end when
# they aren't used. Flags that play a critical role in source working
# correctly will usually be specified on a object-by-object basis, in
# their respective packages.
#
# VARIABLES
#
# Our configuration variables, ordered by increasing preference:
#
# CCFLAGS frontend flags (.i, .c, .cc, .f, .S, .lds, etc.)
# OFLAGS objectify flags (precludes -S and -E)
# CPPFLAGS preprocessor flags (.h, .c, .cc, .S, .inc, .lds, etc.)
# TARGET_ARCH microarchitecture flags (e.g. -march=native)
# COPTS c/c++ flags (.c, .cc)
# CFLAGS c flags (.c only)
# CXXFLAGS c++ flags (.cc only)
# LDFLAGS linker flags (don't use -Wl, frontend prefix)
# ASFLAGS assembler flags (don't use -Wa, frontend prefix)
#
# For each FOO above, there exists (by increasing preference)
#
# DEFAULT_FOO see build/definitions.mk
# CONFIG_FOO see build/config.mk
# FOO set ~/.cosmo.mk and target-specific
# OVERRIDE_FOO set ~/.cosmo.mk and target-specific (use rarely)
#
LC_ALL = C
SOURCE_DATE_EPOCH = 0
ARFLAGS = rcsD
ZFLAGS ?=
XARGS ?= xargs -P4 -rs8000
DOT ?= dot
CLANG = clang
FC = gfortran #/opt/cross9f/bin/x86_64-linux-musl-gfortran
TMPDIR = o/tmp
AR = build/bootstrap/ar.com
CP = build/bootstrap/cp.com
RM = build/bootstrap/rm.com -f
GZIP = build/bootstrap/gzip.com
ECHO = build/bootstrap/echo.com
CHMOD = build/bootstrap/chmod.com
TOUCH = build/bootstrap/touch.com
PKG = build/bootstrap/package.com
MKDEPS = build/bootstrap/mkdeps.com
ZIPOBJ = build/bootstrap/zipobj.com
ZIPCOPY = build/bootstrap/zipcopy.com
FIXUPOBJ = build/bootstrap/fixupobj.com
MKDIR = build/bootstrap/mkdir.com -p
COMPILE = build/bootstrap/compile.com -V9 -P4096 $(QUOTA)
COMMA := ,
PWD := $(shell build/bootstrap/pwd.com)
IGNORE := $(shell $(ECHO) -2 ♥cosmo)
IGNORE := $(shell $(MKDIR) o/tmp)
ifneq ($(findstring aarch64,$(MODE)),)
ARCH = aarch64
VM = o/third_party/qemu/qemu-aarch64
HOSTS ?= pi silicon
else
ARCH = x86_64
HOSTS ?= freebsd openbsd netbsd rhel7 rhel5 xnu win10
endif
ifeq ($(PREFIX),)
ifeq ($(USE_SYSTEM_TOOLCHAIN),)
ifneq ("$(wildcard o/third_party/gcc/bin/x86_64-pc-linux-gnu-*)","")
PREFIX = o/third_party/gcc/bin/x86_64-pc-linux-gnu-
else
IGNORE := $(shell build/bootstrap/unbundle.com)
PREFIX = o/third_party/gcc/bin/x86_64-linux-musl-
endif
ifeq ($(ARCH), aarch64)
PREFIX = o/third_party/gcc/bin/aarch64-linux-musl-
endif
endif
endif
AS = $(PREFIX)as
CC = $(PREFIX)gcc
CXX = $(PREFIX)g++
CXXFILT = $(PREFIX)c++filt
LD = $(PREFIX)ld.bfd
NM = $(PREFIX)nm
GCC = $(PREFIX)gcc
STRIP = $(PREFIX)strip
OBJCOPY = $(PREFIX)objcopy
OBJDUMP = $(PREFIX)objdump
ifneq ($(wildcard $(PWD)/$(PREFIX)addr2line), )
ADDR2LINE = $(PWD)/$(PREFIX)addr2line
else
ADDR2LINE = $(PREFIX)addr2line
endif
export ADDR2LINE
export LC_ALL
export MKDIR
export MODE
export SOURCE_DATE_EPOCH
export TMPDIR
ifeq ($(LANDLOCKMAKE_VERSION),)
TMPSAFE = $(join $(TMPDIR),$(subst /,_,$@)).tmp
else
TMPSAFE = $(TMPDIR)/
endif
ifeq ($(ARCH), aarch64)
IMAGE_BASE_VIRTUAL ?= 0x010000000000
else
IMAGE_BASE_VIRTUAL ?= 0x400000
endif
BACKTRACES = \
-fno-optimize-sibling-calls \
-mno-omit-leaf-frame-pointer
ifneq ($(ARCH), aarch64)
BACKTRACES += -fno-schedule-insns2
endif
SANITIZER = \
-fsanitize=address
NO_MAGIC = \
-fno-stack-protector \
-fwrapv \
-fno-sanitize=all
OLD_CODE = \
-fno-strict-aliasing \
-fno-strict-overflow
TRADITIONAL = \
-Wno-implicit-int \
-Wno-return-type \
-Wno-pointer-sign
DEFAULT_CCFLAGS += \
-Wall \
-Werror \
-fno-omit-frame-pointer \
-fdebug-prefix-map='$(PWD)'= \
-frecord-gcc-switches
DEFAULT_COPTS ?= \
-fno-math-errno \
-fno-ident \
-fno-common \
-fno-gnu-unique \
-fstrict-aliasing \
-fstrict-overflow \
-fno-semantic-interposition \
-fno-dwarf2-cfi-asm \
-fno-unwind-tables \
-fno-asynchronous-unwind-tables
ifeq ($(ARCH), x86_64)
DEFAULT_COPTS += \
-mno-red-zone \
-mno-tls-direct-seg-refs
endif
ifeq ($(ARCH), aarch64)
#
# - Apple says in "Writing ARM64 code for Apple platforms" that we're
# not allowed to use the x18 register.
#
# - Cosmopolitan Libc uses x28 for thread-local storage because Apple
# forbids us from using tpidr_el0 too.
#
DEFAULT_COPTS += \
-ffixed-x18 \
-ffixed-x28 \
-mno-outline-atomics
endif
MATHEMATICAL = \
-O3 \
-fwrapv
DEFAULT_CPPFLAGS += \
-DCOSMO \
-DMODE='"$(MODE)"' \
-DIMAGE_BASE_VIRTUAL=$(IMAGE_BASE_VIRTUAL) \
-nostdinc \
-iquote .
DEFAULT_CFLAGS = \
-std=gnu2x
DEFAULT_CXXFLAGS = \
-fno-rtti \
-fno-exceptions \
-fuse-cxa-atexit \
-fno-threadsafe-statics \
-Wno-int-in-bool-context \
-Wno-narrowing \
-Wno-literal-suffix
DEFAULT_ASFLAGS = \
-W \
-I. \
--noexecstack \
--nocompress-debug-sections
DEFAULT_LDFLAGS = \
-static \
-nostdlib \
--gc-sections \
--build-id=none \
--no-dynamic-linker --cref -Map=$@.map
ifeq ($(ARCH), aarch64)
DEFAULT_LDFLAGS += \
-zmax-page-size=0x4000 \
-zcommon-page-size=0x4000 \
-znorelro
else
DEFAULT_LDFLAGS += \
-zmax-page-size=0x1000 \
-zcommon-page-size=0x1000
endif
ASONLYFLAGS = \
-c \
-g \
--debug-prefix-map='$(PWD)'=
DEFAULT_LDLIBS =
MCA = llvm-mca-10 \
-mtriple=x86_64-pc-linux-gnu \
-instruction-info \
-iterations=3 \
-all-stats \
-all-views \
-timeline
cc.flags = \
$(DEFAULT_CCFLAGS) \
$(CONFIG_CCFLAGS) \
$(CCFLAGS) \
$(OVERRIDE_CCFLAGS)
o.flags = \
$(DEFAULT_OFLAGS) \
$(CONFIG_OFLAGS) \
$(OFLAGS) \
$(OVERRIDE_OFLAGS)
cpp.flags = \
$(DEFAULT_CPPFLAGS) \
$(CONFIG_CPPFLAGS) \
$(CPPFLAGS) \
$(OVERRIDE_CPPFLAGS) \
-include libc/integral/normalize.inc
copt.flags = \
$(TARGET_ARCH) \
$(DEFAULT_COPTS) \
$(CONFIG_COPTS) \
$(COPTS) \
$(OVERRIDE_COPTS)
f.flags = \
$(DEFAULT_FFLAGS) \
$(CONFIG_FFLAGS) \
$(FFLAGS) \
$(OVERRIDE_FFLAGS)
c.flags = \
$(DEFAULT_CFLAGS) \
$(CONFIG_CFLAGS) \
$(CFLAGS) \
$(OVERRIDE_CFLAGS)
cxx.flags = \
$(DEFAULT_CXXFLAGS) \
$(CONFIG_CXXFLAGS) \
$(CXXFLAGS) \
$(OVERRIDE_CXXFLAGS)
s.flags = \
$(DEFAULT_ASFLAGS) \
$(CONFIG_ASFLAGS) \
$(ASFLAGS) \
$(OVERRIDE_ASFLAGS)
S.flags = $(addprefix -Wa$(COMMA),$(s.flags))
LD.libs = \
$(LDLIBS) \
$(LOADLIBES) \
$(DEFAULT_LDLIBS) \
$(CONFIG_LDLIBS) \
$(LDLIBS) \
$(DEFAULT_LIBS) \
$(CONFIG_LIBS) \
$(LIBS)
COMPILE.c.flags = $(cc.flags) $(copt.flags) $(cpp.flags) $(c.flags)
COMPILE.cxx.flags = $(cc.flags) $(copt.flags) $(cpp.flags) $(cxx.flags)
COMPILE.f.flags = $(cc.flags) $(copt.flags) $(f.flags)
COMPILE.F.flags = $(cc.flags) $(copt.flags) $(cpp.flags) $(f.flags)
COMPILE.i.flags = $(cc.flags) $(copt.flags) $(c.flags)
COMPILE.ii.flags = $(cc.flags) $(copt.flags) $(cxx.flags)
LINK.flags = $(DEFAULT_LDFLAGS) $(CONFIG_LDFLAGS) $(LDFLAGS)
OBJECTIFY.c.flags = $(cc.flags) $(o.flags) $(S.flags) $(cpp.flags) $(copt.flags) $(c.flags)
OBJECTIFY.cxx.flags = $(cc.flags) $(o.flags) $(S.flags) $(cpp.flags) $(copt.flags) $(cxx.flags)
OBJECTIFY.s.flags = $(ASONLYFLAGS) $(s.flags)
OBJECTIFY.S.flags = $(cc.flags) $(o.flags) $(S.flags) $(cpp.flags)
OBJECTIFY.f.flags = $(cc.flags) $(o.flags) $(S.flags) $(f.flags)
OBJECTIFY.F.flags = $(cc.flags) $(o.flags) $(S.flags) $(cpp.flags) $(copt.flags) $(f.flags)
PREPROCESS.flags = -E $(copt.flags) $(cc.flags) $(cpp.flags)
PREPROCESS.lds.flags = -D__LINKER__ $(filter-out -g%,$(PREPROCESS.flags)) -P -xc
COMPILE.c = $(CC) -S $(COMPILE.c.flags)
COMPILE.cxx = $(CXX) -S $(COMPILE.cxx.flags)
COMPILE.i = $(CC) -S $(COMPILE.i.flags)
COMPILE.f = $(FC) -S $(COMPILE.f.flags)
COMPILE.F = $(FC) -S $(COMPILE.F.flags)
OBJECTIFY.s = $(AS) $(OBJECTIFY.s.flags)
OBJECTIFY.S = $(CC) $(OBJECTIFY.S.flags) -c
OBJECTIFY.f = $(FC) $(OBJECTIFY.f.flags) -c
OBJECTIFY.F = $(FC) $(OBJECTIFY.F.flags) -c
OBJECTIFY.c = $(CC) $(OBJECTIFY.c.flags) -c
OBJECTIFY.cxx = $(CXX) $(OBJECTIFY.cxx.flags) -c
PREPROCESS = $(CC) $(PREPROCESS.flags)
PREPROCESS.lds = $(CC) $(PREPROCESS.lds.flags)
LINK = $(LD) $(LINK.flags)
ELF = o/libc/elf/elf.lds
ELFLINK = $(COMPILE) -ALINK.elf $(LINK) $(LINKARGS) $(OUTPUT_OPTION) && $(COMPILE) -AFIXUP.ape -T$@ $(FIXUPOBJ) $@
LINKARGS = $(patsubst %.lds,-T %.lds,$(call uniqr,$(LD.libs) $(filter-out %.pkg,$^)))
LOLSAN = build/lolsan -b $(IMAGE_BASE_VIRTUAL)
# The compiler won't generate %xmm code for sources extensioned .greg.c,
# which is needed for C modules wanting to run at the executive level or
# during privileged runtime states, e.g. code morphing.
OBJECTIFY.greg.c = \
$(CC) \
$(filter-out -pg,$(OBJECTIFY.c.flags)) \
-D__MGENERAL_REGS_ONLY__ \
-mgeneral-regs-only \
-fno-stack-protector \
-fno-instrument-functions \
-fno-optimize-sibling-calls \
-fno-sanitize=all \
-ffreestanding \
-fwrapv \
-c
OBJECTIFY.ansi.c = $(CC) $(OBJECTIFY.c.flags) -ansi -Wextra -Werror -pedantic-errors -c
OBJECTIFY.c99.c = $(CC) $(OBJECTIFY.c.flags) -std=c99 -Wextra -Werror -pedantic-errors -c
OBJECTIFY.c11.c = $(CC) $(OBJECTIFY.c.flags) -std=c11 -Wextra -Werror -pedantic-errors -c
OBJECTIFY.c2x.c = $(CC) $(OBJECTIFY.c.flags) -std=c2x -Wextra -Werror -pedantic-errors -c
OBJECTIFY.real.c = \
$(GCC) \
-x-no-pg \
$(OBJECTIFY.c.flags) \
-wrapper build/realify.sh \
-D__REAL_MODE__ \
-ffixed-r8 \
-ffixed-r9 \
-ffixed-r10 \
-ffixed-r11 \
-ffixed-r12 \
-ffixed-r13 \
-ffixed-r14 \
-ffixed-r15 \
-mno-red-zone \
-fcall-used-rbx \
-fno-jump-tables \
-fno-shrink-wrap \
-fno-schedule-insns2 \
-flive-range-shrinkage \
-fno-omit-frame-pointer \
-momit-leaf-frame-pointer \
-mpreferred-stack-boundary=3 \
-fno-delete-null-pointer-checks \
-c
OBJECTIFY.ncabi.c = \
$(GCC) \
$(OBJECTIFY.c.flags) \
-mno-sse \
-mfpmath=387 \
-fno-stack-protector \
-fno-instrument-functions \
-fno-optimize-sibling-calls \
-fno-sanitize=all \
-fcall-saved-rcx \
-fcall-saved-rdx \
-fcall-saved-rdi \
-fcall-saved-rsi \
-fcall-saved-r8 \
-fcall-saved-r9 \
-fcall-saved-r10 \
-fcall-saved-r11 \
-c \
-xc
OBJECTIFY.initabi.c = \
$(GCC) \
$(OBJECTIFY.c.flags) \
-fno-stack-protector \
-fno-instrument-functions \
-fno-optimize-sibling-calls \
-fno-sanitize=all \
-fcall-saved-rdi \
-fcall-saved-rsi \
-c
TAGSFLAGS = \
-e \
-a \
--if0=no \
--langmap=c:.c.h.i \
--line-directives=yes \
--exclude=libc/nt/struct/imagefileheader.internal.h \
--exclude=libc/nt/struct/filesegmentelement.h
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