Re: [PATCH] libsepol/src/Makefile: fix reallocarray detection

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On Mon, Jan 8, 2024 at 4:03 PM Fabrice Fontaine
<fontaine.fabrice@xxxxxxxxx> wrote:
>
> Pass LDFLAGS when checking for reallocarray to avoid the following
> static build failure with musl raised since version 3.4 and
> https://github.com/SELinuxProject/selinux/commit/f0a5f6e33084bd83d409bb7c932256139f471e71
> because -static is not passed when checking for reallocarray:
>
> /home/autobuild/autobuild/instance-9/output-1/host/bin/armeb-buildroot-linux-musleabi-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O0 -g0  -static -I. -I../include -D_GNU_SOURCE -I../cil/include -fPIC -c -o assertion.o assertion.c
> In file included from assertion.c:28:
> private.h:88:21: error: static declaration of 'reallocarray' follows non-static declaration
>    88 | static inline void* reallocarray(void *ptr, size_t nmemb, size_t size) {
>       |                     ^~~~~~~~~~~~
> In file included from ../include/sepol/policydb/mls_types.h:35,
>                  from ../include/sepol/policydb/context.h:23,
>                  from ../include/sepol/policydb/policydb.h:62,
>                  from assertion.c:24:
> /home/autobuild/autobuild/instance-9/output-1/host/armeb-buildroot-linux-musleabi/sysroot/usr/include/stdlib.h:150:7: note: previous declaration of 'reallocarray' with type 'void *(void *, size_t,  size_t)' {aka 'void *(void *, unsigned int,  unsigned int)'}
>   150 | void *reallocarray (void *, size_t, size_t);
>       |       ^~~~~~~~~~~~
>
> Fixes:
>  - http://autobuild.buildroot.org/results/0170032548a38e2c991d62dc5823808458ad03b3
>
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice@xxxxxxxxx>

Acked-by: James Carter <jwcart2@xxxxxxxxx>

> ---
>  libsepol/src/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libsepol/src/Makefile b/libsepol/src/Makefile
> index d80a941f..16b9bd5e 100644
> --- a/libsepol/src/Makefile
> +++ b/libsepol/src/Makefile
> @@ -31,7 +31,7 @@ endif
>
>  # check for reallocarray(3) availability
>  H := \#
> -ifeq (yes,$(shell printf '${H}define _GNU_SOURCE\n${H}include <stdlib.h>\nint main(void){void*p=reallocarray(NULL, 1, sizeof(char));return 0;}' | $(CC) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
> +ifeq (yes,$(shell printf '${H}define _GNU_SOURCE\n${H}include <stdlib.h>\nint main(void){void*p=reallocarray(NULL, 1, sizeof(char));return 0;}' | $(CC) $(LDFLAGS) -x c -o /dev/null - >/dev/null 2>&1 && echo yes))
>  override CFLAGS += -DHAVE_REALLOCARRAY
>  endif
>
> --
> 2.43.0
>
>





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