[PATCH] fstests: workaround for gcc-15

[Zorro Lang <zlang@kernel.org>]

GCC-15 does a big change, it changes the default language version for
C compilation from -std=gnu17 to -std=gnu23. That cause lots of "old
style" C codes hit build errors. On the other word, current xfstests
can't be used with GCC-15. So -std=gnu17 can help that.

Signed-off-by: Zorro Lang <zlang@kernel.org>
---

Hi,

I send this patch just for talking about this issue. The upcoming gcc-15
does lots of changes, a big change is using C23 by default:

  https://gcc.gnu.org/gcc-15/porting_to.html

xfstests has many old style C codes, they hard to be built with gcc-15.
So we have to either add -std=$old_version (likes this patch), or port
the code to C23.

This patch is just a workaround (and a reminder for someone might hit
this issue with gcc-15 too). If you have any good suggestions or experience
(for this kind of issue) to share, feel free to reply.

Thanks,
Zorro

 include/builddefs.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/builddefs.in b/include/builddefs.in
index 5b5864278..ef124bb87 100644
--- a/include/builddefs.in
+++ b/include/builddefs.in
@@ -75,7 +75,7 @@ HAVE_RLIMIT_NOFILE = @have_rlimit_nofile@
 NEED_INTERNAL_XFS_IOC_EXCHANGE_RANGE = @need_internal_xfs_ioc_exchange_range@
 HAVE_FICLONE = @have_ficlone@
 
-GCCFLAGS = -funsigned-char -fno-strict-aliasing -Wall
+GCCFLAGS = -funsigned-char -fno-strict-aliasing -std=gnu17 -Wall
 SANITIZER_CFLAGS += @autovar_init_cflags@
 
 ifeq ($(PKG_PLATFORM),linux)
-- 
2.47.1