diff options
| author | Masahiro Yamada <masahiroy@kernel.org> | 2024-11-10 10:34:36 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2024-11-28 08:11:55 +0900 |
| commit | 1d3730f0012fa04ec392b52cc21f945704ac2e16 (patch) | |
| tree | 668f12f6d829b90c39d6e43d577a2e4b95cc36a5 /Makefile | |
| parent | 11b3d5175e6bc3779159228e6077be202d2b0069 (diff) | |
kbuild: support -fmacro-prefix-map for external modules
This commit makes -fmacro-prefix-map work for external modules built in
a separate output directory. It improves the reproducibility of external
modules and provides the benefits described in commit a73619a845d5
("kbuild: use -fmacro-prefix-map to make __FILE__ a relative path").
When building_out_of_srctree is not defined (e.g., when the kernel or
external module is built in the source directory), this option is
unnecessary.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -1041,8 +1041,10 @@ ifdef CONFIG_CC_IS_GCC KBUILD_CFLAGS += -fconserve-stack endif -# change __FILE__ to the relative path from the srctree -KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) +# change __FILE__ to the relative path to the source directory +ifdef building_out_of_srctree +KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srcroot)/=) +endif # include additional Makefiles when needed include-y := scripts/Makefile.extrawarn |