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@xxxxxxxxxx>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@xxxxxxxxxxxxxxx>
Reviewed-by: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>
---
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
