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| author | Masahiro Yamada <masahiroy@kernel.org> | 2020-09-10 16:44:29 +0300 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2020-09-24 18:36:50 +0300 |
| commit | bb2732112bc52bed7b20b9fc59d7246e4e7ce5ed (patch) | |
| tree | 82ed0d438c401b482494e4b84457c714f27d7cc6 | |
| parent | 9909b7681222299dcb6f3b0613c30a65498b6c72 (diff) | |
| download | linux-bb2732112bc52bed7b20b9fc59d7246e4e7ce5ed.tar.xz | |
kbuild: move CFLAGS_{KASAN,UBSAN,KCSAN} exports to relevant Makefiles
Move CFLAGS_KASAN*, CFLAGS_UBSAN, CFLAGS_KCSAN to Makefile.kasan,
Makefile.ubsan, Makefile.kcsan, respectively.
This commit also avoids the same -fsanitize=* flags being added to
CFLAGS_UBSAN multiple times.
Prior to this commit, the ubsan flags were appended by the '+='
operator, without any initialization. Some build targets such as
'make bindeb-pkg' recurses to the top Makefile, and ended up with
adding the same flags to CFLAGS_UBSAN twice.
Clear CFLAGS_UBSAN with ':=' to make it a simply expanded variable.
This is better than a recursively expanded variable, which evaluates
$(call cc-option, ...) multiple times before Kbuild starts descending
to subdirectories.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Marco Elver <elver@google.com>
| -rw-r--r-- | Makefile | 1 | ||||
| -rw-r--r-- | scripts/Makefile.kasan | 2 | ||||
| -rw-r--r-- | scripts/Makefile.kcsan | 2 | ||||
| -rw-r--r-- | scripts/Makefile.ubsan | 3 |
4 files changed, 6 insertions, 2 deletions
@@ -516,7 +516,6 @@ export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE -export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN CFLAGS_KCSAN export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 1532f1a41a8f..1e000cc2e7b4 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -47,3 +47,5 @@ CFLAGS_KASAN := -fsanitize=kernel-hwaddress \ $(instrumentation_flags) endif # CONFIG_KASAN_SW_TAGS + +export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE diff --git a/scripts/Makefile.kcsan b/scripts/Makefile.kcsan index c50f27b3ac56..cec50d74e0d0 100644 --- a/scripts/Makefile.kcsan +++ b/scripts/Makefile.kcsan @@ -9,7 +9,7 @@ endif # Keep most options here optional, to allow enabling more compilers if absence # of some options does not break KCSAN nor causes false positive reports. -CFLAGS_KCSAN := -fsanitize=thread \ +export CFLAGS_KCSAN := -fsanitize=thread \ $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0) -fno-optimize-sibling-calls) \ $(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1)) \ $(call cc-param,tsan-distinguish-volatile=1) diff --git a/scripts/Makefile.ubsan b/scripts/Makefile.ubsan index 27348029b2b8..c661484ee01f 100644 --- a/scripts/Makefile.ubsan +++ b/scripts/Makefile.ubsan @@ -1,4 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 + +export CFLAGS_UBSAN := + ifdef CONFIG_UBSAN_ALIGNMENT CFLAGS_UBSAN += $(call cc-option, -fsanitize=alignment) endif |