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authorTavian Barnes <tavianator@tavianator.com>2024-05-07 15:42:46 -0400
committerTavian Barnes <tavianator@tavianator.com>2024-05-07 15:42:46 -0400
commit452d6697e0f92326ab139eed4eadd9c2fd8b55ca (patch)
tree0feeb3722dcf6debb6c33c5175342bf1d70a1dba /build/flags.mk
parenta4299f9bc1d3e60a7e628561e8d650c2a241e1c2 (diff)
parentc5cf2cf90834f2f56b2940d2a499a1a614ebfd21 (diff)
downloadbfs-452d6697e0f92326ab139eed4eadd9c2fd8b55ca.tar.xz
Merge branch 'main' into find2fdfind2fd
Diffstat (limited to 'build/flags.mk')
-rw-r--r--build/flags.mk136
1 files changed, 136 insertions, 0 deletions
diff --git a/build/flags.mk b/build/flags.mk
new file mode 100644
index 0000000..c911b22
--- /dev/null
+++ b/build/flags.mk
@@ -0,0 +1,136 @@
+# Copyright © Tavian Barnes <tavianator@tavianator.com>
+# SPDX-License-Identifier: 0BSD
+
+# Makefile that generates gen/flags.mk
+
+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
+
+# Platform-specific system libraries
+LDLIBS,DragonFly := -lposix1e
+LDLIBS,Linux := -lrt
+LDLIBS,NetBSD := -lutil
+LDLIBS,SunOS := -lsec -lsocket -lnsl
+export BFS_LDLIBS=${LDLIBS,${OS}}
+
+# Build profiles
+_ASAN := ${TRUTHY,${ASAN}}
+_LSAN := ${TRUTHY,${LSAN}}
+_MSAN := ${TRUTHY,${MSAN}}
+_TSAN := ${TRUTHY,${TSAN}}
+_UBSAN := ${TRUTHY,${UBSAN}}
+_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
+
+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}}
+
+SAN_CFLAGS,y := -fno-sanitize-recover=all
+INSANE := ${NOT,${_ASAN}${_LSAN}${_MSAN}${_TSAN}${_UBSAN}}
+SAN := ${NOT,${INSANE}}
+export 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,${_GCOV}}
+
+LINT_CPPFLAGS,y := -D_FORTIFY_SOURCE=3 -DBFS_LINT
+LINT_CFLAGS,y := -Werror -O2
+
+export LINT_CPPFLAGS=${LINT_CPPFLAGS,${_LINT}}
+export LINT_CFLAGS=${LINT_CFLAGS,${_LINT}}
+
+RELEASE_CPPFLAGS,y := -DNDEBUG
+RELEASE_CFLAGS,y := -O3 -flto=auto
+
+export RELEASE_CPPFLAGS=${RELEASE_CPPFLAGS,${_RELEASE}}
+export RELEASE_CFLAGS=${RELEASE_CFLAGS,${_RELEASE}}
+
+# Set a variable
+SETVAR = @printf '%s := %s\n' >>$@
+
+# Append to a variable, if non-empty
+APPEND = @append() { test -z "$$2" || printf '%s += %s\n' "$$1" "$$2" >>$@; }; append
+
+gen/flags.mk::
+ ${MSG} "[ GEN] $@"
+ @printf '# %s\n' "$@" >$@
+ ${SETVAR} CPPFLAGS "$$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"
+ @test "${OS}-${SAN}" != FreeBSD-y || printf 'POSTLINK = elfctl -e +noaslr $$@\n' >>$@
+ ${VCAT} $@