configure: Go back to C11

On Fedora, the BIND headers seem to want old atomic semantics. Our own
code shouldn't matter much as we are not using any modern features.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/configure.ac b/configure.ac
index ce15c9b7a2f2643da2855d856c93543292a0e031..5054f2db529ea84cab4c6a1442c7dd3c41ef7a0f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -62,7 +62,7 @@ m4_pattern_forbid([^_?PKG_[A-Z_]+$],[*** pkg.m4 missing, please install pkg-conf
 AC_PROG_CC
 
 CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
-       -std=gnu23 \
+       -std=gnu11 \
        -Wall \
        -Wextra \
        -Warray-bounds=2 \