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libsepol: harden availability check against user CFLAGS

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If CFLAGS set by the user contains the warnings override
`-Wno-error=implicit-function-declaration` the availability check does
not work properly.  Explicitly enable and treat this warnings as failure
by appending the appropriate flag.

Also include CPPFLAGS in the check.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: James Carter <jwcart2@gmail.com>
This commit is contained in:
Christian Göttsche 2024-11-20 14:10:03 +01:00 committed by James Carter
parent 856895ca25
commit d49a3ecb43
1 changed files with 1 additions and 1 deletions
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2
libsepol/src/Makefile
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@ -31,7 +31,7 @@ endif
# check for reallocarray(3) availability
H := \#
ifeq (yes,$(shell printf '${H}include <stdlib.h>\nint main(void){return reallocarray(NULL,0,0)==NULL;}' | $(CC) $(CFLAGS) $(LDFLAGS) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
ifeq (yes,$(shell printf '${H}include <stdlib.h>\nint main(void){return reallocarray(NULL,0,0)==NULL;}' | $(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -Werror=implicit-function-declaration -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
override CFLAGS += -DHAVE_REALLOCARRAY
endif