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Justine Tunney 2020-06-15 07:18:57 -07:00
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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 allows our `make SILENT=0` logs
# 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 target-by-target basis, in
# their respective packages.
#
# NOTE might have gotten the per-target override flag flow wrong since
# flags defined that way might flow quadratically opposite blaze.
#
# VARIABLES
#
# CCFLAGS gcc frontend flags (.i, .c, .cc, .f, .S, .lds, etc.)
# CPPFLAGS preprocessor flags (.h, .c, .cc, .S, .inc, .lds, etc.)
# CFLAGS c flags (.c only)
# CXXFLAGS c++ flags (.cc only)
# COPTS c/c++ flags (.c, .cc)
# LDFLAGS linker flags (don't use -Wl, frontend prefix)
# ASFLAGS assembler flags (don't use -Wa, frontend prefix)
# TARGET_ARCH microarchitecture flags (e.g. -march=native)
SHELL = /bin/sh
DD ?= /bin/dd
CP ?= /bin/cp -f
RM ?= /bin/rm -f
SED ?= /bin/sed
MKDIR ?= /bin/mkdir -p
TAGS ?= ctags
ARFLAGS = rcsD
TAGSFLAGS ?= -e -a --if0=no --langmap=c:.c.h.i --line-directives=yes
SILENT ?= 1
ZFLAGS ?= -4 --rsyncable
XARGS ?= xargs -P4 -rs8000
NICE ?= build/actuallynice
RAGEL ?= ragel
DOT ?= dot
GZ ?= gzip
CLANG = clang-11
FC = gfortran #/opt/cross9f/bin/x86_64-linux-musl-gfortran
# see build/compile, etc. which run third_party/gcc/unbundle.sh
AS = o/third_party/gcc/bin/x86_64-linux-musl-as
CC = o/third_party/gcc/bin/x86_64-linux-musl-gcc
CXX = o/third_party/gcc/bin/x86_64-linux-musl-g++
LD = o/third_party/gcc/bin/x86_64-linux-musl-ld.bfd
AR = o/third_party/gcc/bin/x86_64-linux-musl-ar
NM = o/third_party/gcc/bin/x86_64-linux-musl-nm
GCC = o/third_party/gcc/bin/x86_64-linux-musl-gcc
STRIP = o/third_party/gcc/bin/x86_64-linux-musl-strip
OBJCOPY = o/third_party/gcc/bin/x86_64-linux-musl-objcopy
ADDR2LINE = o/third_party/gcc/bin/x86_64-linux-musl-addr2line
COMMA := ,
PWD := $(shell pwd)
IMAGE_BASE_VIRTUAL ?= 0x400000
TMPDIR := $(shell build/findtmp)
LOGFMT := $(shell build/getlogfmt)
CCNAME := $(shell build/getccname $(CC))
CCVERSION := $(shell build/getccversion $(CC))
BLAH1 := $(shell build/zipobj 2>/dev/null)
BLAH2 := $(shell build/package 2>/dev/null)
export ADDR2LINE
export CCNAME
export CCVERSION
export CP
export DD
export GZ
export IMAGE_BASE_VIRTUAL
export LOGFMT
export MKDIR
export MODE
export RM
export SED
export SILENT
export TMPDIR
export ZFLAGS
FTRACE = \
-pg
SANITIZER = \
-fsanitize=undefined \
-fsanitize=leak \
-fsanitize=implicit-signed-integer-truncation \
-fsanitize=implicit-integer-sign-change
NO_MAGIC = \
-mno-fentry \
-fno-stack-protector \
-fno-sanitize=all
OLD_CODE = \
-fno-strict-aliasing \
-fno-strict-overflow
TRADITIONAL = \
-Wno-implicit-int \
-Wno-return-type \
-Wno-pointer-sign
DEFAULT_CCFLAGS = \
-Wall \
-Werror \
-fmerge-all-constants \
-fdebug-prefix-map="$(PWD)"= \
-frecord-gcc-switches
DEFAULT_OFLAGS = \
-g \
-gdescribe-dies
DEFAULT_COPTS = \
-fno-math-errno \
-fno-trapping-math \
-fno-fp-int-builtin-inexact \
-fno-ident \
-fno-common \
-fno-gnu-unique \
-fmerge-constants \
-fstrict-aliasing \
-fstrict-overflow \
-fno-omit-frame-pointer \
-fno-optimize-sibling-calls \
-mno-omit-leaf-frame-pointer
DEFAULT_CPPFLAGS = \
-DIMAGE_BASE_VIRTUAL=$(IMAGE_BASE_VIRTUAL) \
-nostdinc \
-iquote . \
-include libc/integral/normalize.inc
DEFAULT_CFLAGS = \
-std=gnu2x
DEFAULT_CXXFLAGS = \
-std=gnu++11 \
-fno-rtti \
-fno-exceptions \
-fuse-cxa-atexit \
-fno-threadsafe-statics
DEFAULT_ASFLAGS = \
-W \
-I. \
--noexecstack
DEFAULT_LDFLAGS = \
-h \
-static \
--relax \
-nostdlib \
-m elf_x86_64 \
--gc-sections \
--build-id=none \
--cref -Map=$@.map \
--no-dynamic-linker \
-Ttext-segment=$(IMAGE_BASE_VIRTUAL)
ASONLYFLAGS = \
-g \
--debug-prefix-map="$(PWD)"=
DEFAULT_LDLIBS =
MCA = llvm-mca-10 \
-mtriple=x86_64-pc-linux-gnu \
-iterations=3 \
-instruction-info \
-iterations=3 \
-all-stats \
-all-views \
-timeline
cc.flags = \
$(DEFAULT_CCFLAGS) \
$(CONFIG_CCFLAGS) \
$(CCFLAGS) \
$(OVERRIDE_CCFLAGS) \
-D__SAUCE__=\"$<\"
o.flags = \
$(DEFAULT_OFLAGS) \
$(CONFIG_OFLAGS) \
$(OFLAGS) \
$(OVERRIDE_OFLAGS)
cpp.flags = \
$(DEFAULT_CPPFLAGS) \
$(CONFIG_CPPFLAGS) \
$(CPPFLAGS) \
$(OVERRIDE_CPPFLAGS)
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) $(cpp.flags) $(copt.flags) $(c.flags)
COMPILE.cxx.flags = $(cc.flags) $(cpp.flags) $(copt.flags) $(cxx.flags)
COMPILE.f.flags = $(cc.flags) $(copt.flags) $(f.flags)
COMPILE.F.flags = $(cc.flags) $(cpp.flags) $(copt.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 = $(OBJECTIFY.S.flags) $(copt.flags) $(c.flags)
OBJECTIFY.cxx.flags = $(OBJECTIFY.S.flags) $(copt.flags) $(cxx.flags)
OBJECTIFY.s.flags = $(ASONLYFLAGS) $(s.flags)
OBJECTIFY.S.flags = $(copt.flags) $(cc.flags) $(o.flags) $(cpp.flags) $(S.flags)
OBJECTIFY.f.flags = $(copt.flags) $(cc.flags) $(o.flags) $(copt.flags) $(S.flags) $(f.flags)
OBJECTIFY.F.flags = $(OBJECTIFY.f.flags) $(cpp.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.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 = build/link $(LD) $(LINK.flags)
ELF = o/libc/elf/elf.lds
ELFLINK = ACTION=LINK.elf $(LINK) $(LINKARGS) $(OUTPUT_OPTION)
ARCHIVE = build/archive $(AR) $(ARFLAGS)
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 \
-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
# No-Clobber ABI (clobbers nothing, except rax and flags)
#
# This ABI is intended for core library functions that're frequently
# called by just about everything, e.g. memcpy, malloc, etc. By offering
# this guarantee, callers can optionally call these functions via asm(),
# which reduces register allocator pressure at call sites.
#
# This makes unrelated caller code faster, but the NCABI functions
# themselves a tiny bit slower. That's OK, since modern NexGen-32e CPUs
# seem to have one fifth of their execution engines devoted to pushing
# and popping, probably so legacy IA-32 code keeps going fast; so we use
# it to our advantage.
OBJECTIFY.ncabi.c = \
$(GCC) \
$(OBJECTIFY.c.flags) \
-mno-sse \
-mfpmath=387 \
-mno-fentry \
-fno-stack-protector \
-fno-instrument-functions \
-fno-optimize-sibling-calls \
-mpreferred-stack-boundary=3 \
-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
BUILD_SRCS = \
build/definitions.mk \
build/rules.mk \
build/compile \
build/link \
build/lolsan \
build/remote