fix linux builds

diff --git a/configure.ac b/configure.ac
index 6ba2705d7e9a2b8c4d0a8bd956a247fb820eb11d..7811b7d7455ebbc30d2b20bbbc7ba3b1f90d53b1 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -45,7 +45,7 @@ AC_PROG_LIBTOOL
 AC_C_BIGENDIAN
 AC_C_INLINE
 
-CFLAGS="$CFLAGS -std=c99"
+CFLAGS="$CFLAGS -std=gnu99"
 CXXFLAGS="$CXXFLAGS -std=c++11"
 
 AX_CXX_COMPILE_STDCXX_11