[gimp] configure: comment out -Wsystem-headers for now...

[Jehan Pagès <jehanp src gnome org>]

commit 7160e053496876e541f3d8809e347d5c9f20b432
Author: Jehan <jehan girinstud io>
Date:   Wed Sep 9 03:21:49 2015 +0200

    configure: comment out -Wsystem-headers for now...
    
    It outputs far too many warnings on some systems (like OSX apparently).

 configure.ac |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 3ed4e05..cbb3654 100644
--- a/configure.ac
+++ b/configure.ac
@@ -440,8 +440,10 @@ CFLAGS="$CFLAGS $extra_warnings"
 # -Wreturn-type warns on forgotten return on non-void functions,
 # but not of g_return_if_fail() on non-void functions.
 # -Wsystem-headers is needed for that.
-GIMP_DETECT_CFLAGS(extra_warnings, '-Wsystem-headers')
-CFLAGS="$CFLAGS $extra_warnings"
+# Unfortunately it pulls tons of warnings on some systems.
+# So we comment out for now.
+# GIMP_DETECT_CFLAGS(extra_warnings, '-Wsystem-headers')
+# CFLAGS="$CFLAGS $extra_warnings"
 
 # Extra optimization flags for super performance
 GIMP_DETECT_CFLAGS(extra_warnings, '--omg-optimized')