Don't pass -ffast-math to clang, since it ignores it and complains.

diff --git a/configure.ac b/configure.ac
index cf2e200db3f8688a224c6085ad91b57be465e068..77004cc881093fc1ca488bf44cbb996e6b51aa56 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -137,7 +137,10 @@ esac
 
 dnl Add flags for gcc and g++
 if test "x$GCC" = xyes; then
-    CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -std=c99 -ffast-math"
+    CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -std=c99"
+    if test "x$CLANG" = "xno"; then
+       CFLAGS="$CFLAGS -ffast-math"
+    fi
 
     # Enable -fvisibility=hidden if using a gcc that supports it
     save_CFLAGS="$CFLAGS"