Messages in this thread Patch in this message | | | From | Amadeusz Sławiński <> | Subject | [PATCH] Makefile: Fix build with scan-build | Date | Wed, 19 Jan 2022 14:51:47 +0100 |
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When building kernel with scan-build for analysis: $ scan-build make defconfig $ scan-build make menuconfig # disable RETPOLINE $ scan-build make -j16 bindeb-pkg since commit 7d73c3e9c514 ("Makefile: remove stale cc-option checks") it fails with: CC scripts/mod/empty.o could not find clang line make[4]: *** [scripts/Makefile.build:287: scripts/mod/empty.o] Error 1
Seems like changes to how -fconserve-stack support was detected broke build with scan-build. Revert part of mentioned commit which changed that.
Fixes: 7d73c3e9c514 ("Makefile: remove stale cc-option checks") CC: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com> --- Makefile | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/Makefile b/Makefile index 765115c99655..1174ccd182f5 100644 --- a/Makefile +++ b/Makefile @@ -991,9 +991,7 @@ KBUILD_CFLAGS += -fno-strict-overflow KBUILD_CFLAGS += -fno-stack-check # conserve stack if available -ifdef CONFIG_CC_IS_GCC -KBUILD_CFLAGS += -fconserve-stack -endif +KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) # Prohibit date/time macros, which would make the build non-deterministic KBUILD_CFLAGS += -Werror=date-time -- 2.25.1
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