[PATCH] fstests: use '-std=gnu11' to fix build errors with gcc-15

[Zorro Lang <zlang@kernel.org>]

GCC-15 does a big change, it changes the default C compilation
language standard to -std=gnu23. That cause lots of "old style"
C codes hit building errors. On the other word, current xfstests
can't be used with GCC-15. So use a fixed language standard --
"-std=gnu11" (to match the kernel and xfsprogs).

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

Hi,

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.

Thanks,
Zorro

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

diff --git a/include/builddefs.in b/include/builddefs.in
index 7274cde8d..631e5d83f 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=gnu11 -Wall
 
 ifeq ($(PKG_PLATFORM),linux)
 PCFLAGS = -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 $(GCCFLAGS)
-- 
2.47.1