diff options
Diffstat (limited to 'build/flags.mk')
| -rw-r--r-- | build/flags.mk | 155 |
1 files changed, 73 insertions, 82 deletions
diff --git a/build/flags.mk b/build/flags.mk index c911b22..2562e03 100644 --- a/build/flags.mk +++ b/build/flags.mk @@ -6,47 +6,18 @@ include build/prelude.mk include gen/vars.mk -# Configurable flags -CPPFLAGS ?= -CFLAGS ?= \ - -g \ - -Wall \ - -Wformat=2 \ - -Werror=implicit \ - -Wimplicit-fallthrough \ - -Wmissing-declarations \ - -Wshadow \ - -Wsign-compare \ - -Wstrict-prototypes -LDFLAGS ?= -LDLIBS ?= - -export XCPPFLAGS=${CPPFLAGS} -export XCFLAGS=${CFLAGS} -export XLDFLAGS=${LDFLAGS} -export XLDLIBS=${LDLIBS} - -# Immutable flags -export BFS_CPPFLAGS= \ - -Isrc \ - -Igen \ - -D__EXTENSIONS__ \ - -D_ATFILE_SOURCE \ - -D_BSD_SOURCE \ - -D_DARWIN_C_SOURCE \ - -D_DEFAULT_SOURCE \ - -D_GNU_SOURCE \ - -D_POSIX_PTHREAD_SEMANTICS \ - -D_FILE_OFFSET_BITS=64 \ - -D_TIME_BITS=64 -export BFS_CFLAGS= -std=c17 -pthread +# Internal flags +_CPPFLAGS := -Isrc -Igen -include src/prelude.h +_CFLAGS := -std=c17 -pthread +_LDFLAGS := +_LDLIBS := # Platform-specific system libraries LDLIBS,DragonFly := -lposix1e LDLIBS,Linux := -lrt LDLIBS,NetBSD := -lutil LDLIBS,SunOS := -lsec -lsocket -lnsl -export BFS_LDLIBS=${LDLIBS,${OS}} +_LDLIBS += ${LDLIBS,${OS}} # Build profiles _ASAN := ${TRUTHY,${ASAN}} @@ -58,79 +29,99 @@ _GCOV := ${TRUTHY,${GCOV}} _LINT := ${TRUTHY,${LINT}} _RELEASE := ${TRUTHY,${RELEASE}} -# https://github.com/google/sanitizers/issues/342 -TSAN_CPPFLAGS,y := -DBFS_USE_TARGET_CLONES=0 -export TSAN_CPPFLAGS=${TSAN_CPPFLAGS,${_TSAN}} - ASAN_CFLAGS,y := -fsanitize=address LSAN_CFLAGS,y := -fsanitize=leak MSAN_CFLAGS,y := -fsanitize=memory -fsanitize-memory-track-origins TSAN_CFLAGS,y := -fsanitize=thread -UBSAN_CFLAGS.y := -fsanitize=undefined +UBSAN_CFLAGS,y := -fsanitize=undefined -export ASAN_CFLAGS=${ASAN_CFLAGS,${_ASAN}} -export LSAN_CFLAGS=${LSAN_CFLAGS,${_LSAN}} -export MSAN_CFLAGS=${MSAN_CFLAGS,${_MSAN}} -export TSAN_CFLAGS=${TSAN_CFLAGS,${_TSAN}} -export UBSAN_CFLAGS=${UBSAN_CFLAGS,${_UBSAN}} +_CFLAGS += ${ASAN_CFLAGS,${_ASAN}} +_CFLAGS += ${LSAN_CFLAGS,${_LSAN}} +_CFLAGS += ${MSAN_CFLAGS,${_MSAN}} +_CFLAGS += ${TSAN_CFLAGS,${_TSAN}} +_CFLAGS += ${UBSAN_CFLAGS,${_UBSAN}} SAN_CFLAGS,y := -fno-sanitize-recover=all INSANE := ${NOT,${_ASAN}${_LSAN}${_MSAN}${_TSAN}${_UBSAN}} SAN := ${NOT,${INSANE}} -export SAN_CFLAGS=${SAN_CFLAGS,${SAN}} +_CFLAGS += ${SAN_CFLAGS,${SAN}} # MSAN and TSAN both need all code to be instrumented YESLIBS := ${NOT,${_MSAN}${_TSAN}} NOLIBS ?= ${NOT,${YESLIBS}} -export XNOLIBS=${NOLIBS} # gcov only intercepts fork()/exec() with -std=gnu* GCOV_CFLAGS,y := -std=gnu17 --coverage -export GCOV_CFLAGS=${GCOV_CFLAGS,${_GCOV}} +_CFLAGS += ${GCOV_CFLAGS,${_GCOV}} LINT_CPPFLAGS,y := -D_FORTIFY_SOURCE=3 -DBFS_LINT LINT_CFLAGS,y := -Werror -O2 -export LINT_CPPFLAGS=${LINT_CPPFLAGS,${_LINT}} -export LINT_CFLAGS=${LINT_CFLAGS,${_LINT}} +_CPPFLAGS += ${LINT_CPPFLAGS,${_LINT}} +_CFLAGS += ${LINT_CFLAGS,${_LINT}} RELEASE_CPPFLAGS,y := -DNDEBUG RELEASE_CFLAGS,y := -O3 -flto=auto -export RELEASE_CPPFLAGS=${RELEASE_CPPFLAGS,${_RELEASE}} -export RELEASE_CFLAGS=${RELEASE_CFLAGS,${_RELEASE}} - -# Set a variable -SETVAR = @printf '%s := %s\n' >>$@ +_CPPFLAGS += ${RELEASE_CPPFLAGS,${_RELEASE}} +_CFLAGS += ${RELEASE_CFLAGS,${_RELEASE}} -# Append to a variable, if non-empty -APPEND = @append() { test -z "$$2" || printf '%s += %s\n' "$$1" "$$2" >>$@; }; append - -gen/flags.mk:: +# Configurable flags +CFLAGS ?= -g -Wall + +# Add the configurable flags last so they can override ours +_CPPFLAGS += ${CPPFLAGS} ${EXTRA_CPPFLAGS} +_CFLAGS += ${CFLAGS} ${EXTRA_CFLAGS} +_LDFLAGS += ${LDFLAGS} ${EXTRA_LDFLAGS} +# (except LDLIBS, as earlier libs override later ones) +_LDLIBS := ${LDLIBS} ${EXTRA_LDLIBS} ${_LDLIBS} + +include build/exports.mk + +# Conditionally-supported flags +AUTO_FLAGS := \ + gen/flags/Wformat.mk \ + gen/flags/Wimplicit-fallthrough.mk \ + gen/flags/Wimplicit.mk \ + gen/flags/Wmissing-decls.mk \ + gen/flags/Wmissing-var-decls.mk \ + gen/flags/Wshadow.mk \ + gen/flags/Wsign-compare.mk \ + gen/flags/Wstrict-prototypes.mk \ + gen/flags/Wundef-prefix.mk \ + gen/flags/bind-now.mk \ + gen/flags/deps.mk + +gen/flags.mk: ${AUTO_FLAGS} ${MSG} "[ GEN] $@" @printf '# %s\n' "$@" >$@ - ${SETVAR} CPPFLAGS "$$BFS_CPPFLAGS" - ${APPEND} CPPFLAGS "$$TSAN_CPPFLAGS" - ${APPEND} CPPFLAGS "$$LINT_CPPFLAGS" - ${APPEND} CPPFLAGS "$$RELEASE_CPPFLAGS" - ${APPEND} CPPFLAGS "$$XCPPFLAGS" - ${APPEND} CPPFLAGS "$$EXTRA_CPPFLAGS" - ${SETVAR} CFLAGS "$$BFS_CFLAGS" - ${APPEND} CFLAGS "$$ASAN_CFLAGS" - ${APPEND} CFLAGS "$$LSAN_CFLAGS" - ${APPEND} CFLAGS "$$MSAN_CFLAGS" - ${APPEND} CFLAGS "$$TSAN_CFLAGS" - ${APPEND} CFLAGS "$$UBSAN_CFLAGS" - ${APPEND} CFLAGS "$$SAN_CFLAGS" - ${APPEND} CFLAGS "$$GCOV_CFLAGS" - ${APPEND} CFLAGS "$$LINT_CFLAGS" - ${APPEND} CFLAGS "$$RELEASE_CFLAGS" - ${APPEND} CFLAGS "$$XCFLAGS" - ${APPEND} CFLAGS "$$EXTRA_CFLAGS" - ${SETVAR} LDFLAGS "$$XLDFLAGS" - ${SETVAR} LDLIBS "$$XLDLIBS" - ${APPEND} LDLIBS "$$EXTRA_LDLIBS" - ${APPEND} LDLIBS "$$BFS_LDLIBS" - ${SETVAR} NOLIBS "$$XNOLIBS" + @printf '_CPPFLAGS := %s\n' "$$XCPPFLAGS" >>$@ + @printf '_CFLAGS := %s\n' "$$XCFLAGS" >>$@ + @printf '_LDFLAGS := %s\n' "$$XLDFLAGS" >>$@ + @printf '_LDLIBS := %s\n' "$$XLDLIBS" >>$@ + @printf 'NOLIBS := %s\n' "$$XNOLIBS" >>$@ @test "${OS}-${SAN}" != FreeBSD-y || printf 'POSTLINK = elfctl -e +noaslr $$@\n' >>$@ + @cat ${.ALLSRC} >>$@ + @cat ${.ALLSRC:%=%.log} >gen/flags.log ${VCAT} $@ +.PHONY: gen/flags.mk + +# Check that the C compiler works at all +cc:: + @build/cc.sh -q build/empty.c -o gen/.cc.out; \ + ret=$$?; \ + build/msg-if.sh "[ CC ] build/empty.c" test $$ret -eq 0; \ + exit $$ret + +# The short name of the config test +SLUG = ${@:gen/%.mk=%} +# The source file to build +CSRC = build/${SLUG}.c +# The hidden output file name +OUT = ${SLUG:flags/%=gen/flags/.%.out} + +${AUTO_FLAGS}: cc + @${MKDIR} ${@D} + @build/flags-if.sh ${CSRC} -o ${OUT} >$@ 2>$@.log; \ + build/msg-if.sh "[ CC ] ${SLUG}.c" test $$? -eq 0 +.PHONY: ${AUTO_FLAGS} |