X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=configure.ac;h=b843d6c82dc57875ccc29253c4d01271c60d732a;hb=3b5512f573ab0a1fc3ff107db77d5e2f7c2b9a28;hp=031bfe6cb2ca8247e4e5d393329b3436e836b9dc;hpb=1a93ac450a3566dd6c357c8a2b19f4e039d8f060;p=flightgear.git

diff --git a/configure.ac b/configure.ac
index 031bfe6cb..b843d6c82 100644
--- a/configure.ac
+++ b/configure.ac
@@ -34,7 +34,8 @@ case "${host}" in
     if test "$CXX" = "CC"; then
         AR="CC -ar"
         ARFLAGS="-o"
-        CXXFLAGS="$CXXFLAGS -I$with_simgear/include/simgear/compatibility"
+        CXXFLAGS="$CXXFLAGS -c99 -I$with_simgear/include/simgear/compatibility"
+        CFLAGS="$CFLAGS -c99"
     else
         AR="ar"
         ARFLAGS="cru"