Use a better -Wno-pedantic heuristic.

[rsync.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 1116e658a5a5db288c71570bc5d7f05be8f12715..3fd7e5d589491aae486c140ae3b88755721050fe 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1053,9 +1053,10 @@ if test x"$GCC" = x"yes"; then
     else
        # Our internal popt code cannot be compiled with pedantic warnings as errors, so try to
        # turn off pedantic warnings (which will not lose the error for array-init overflow).
-       case `$CC -dumpversion 2>/dev/null` in
-           4.*) ;; # Early gcc doesn't understand -Wno-pedantic
-           *) CFLAGS="$CFLAGS -pedantic-errors -Wno-pedantic" ;;
+       # Older gcc versions don't understand -Wno-pedantic, so check if --help=warnings lists
+       # -Wpedantic and use that as a flag.
+       case `$CC --help=warnings 2>/dev/null | grep Wpedantic` in
+           *-Wpedantic*) CFLAGS="$CFLAGS -pedantic-errors -Wno-pedantic" ;;
        esac
     fi
 fi