diff -pruN gyp.orig/pylib/gyp/generator/make.py gyp/pylib/gyp/generator/make.py
--- gyp.orig/pylib/gyp/generator/make.py	2011-08-23 16:47:59.000000000 +0900
+++ gyp/pylib/gyp/generator/make.py	2011-08-23 17:31:13.000000000 +0900
@@ -1554,6 +1554,7 @@ $(obj).$(TOOLSET)/$(TARGET)/%%.o: $(obj)
     # Write configuration-specific variables for CFLAGS, etc.
     for configname in sorted(configs.keys()):
       config = configs[configname]
+      rpmoptflags = ['$(RPM_OPT_FLAGS)']
       self.WriteList(config.get('defines'), 'DEFS_%s' % configname, prefix='-D',
           quoter=EscapeCppDefine)
 
@@ -1565,8 +1566,20 @@ $(obj).$(TOOLSET)/$(TARGET)/%%.o: $(obj)
         cflags_objcc = self.xcode_settings.GetCflagsObjCC(configname)
       else:
         cflags = config.get('cflags')
+        if cflags:
+          cflags += rpmoptflags
+        else:
+          cflags = rpmoptflags
         cflags_c = config.get('cflags_c')
+        if cflags_c:
+          cflags_c += rpmoptflags
+        else:
+          cflags_c = rpmoptflags
         cflags_cc = config.get('cflags_cc')
+        if cflags_cc:
+          cflags_cc += rpmoptflags
+        else:
+          cflags_cc = rpmoptflags
 
       self.WriteLn("# Flags passed to all source files.");
       self.WriteList(cflags, 'CFLAGS_%s' % configname)