 +        finally:
 +            # 4. restore to original, just in case
 +            self.compiler._compile = original__compile
- 
- 
+
+
  #------------------------------------------------------------------------------------

@@ -22,6 +22,24 @@
         if compiler not in self.openmp_compile_args:
             compiler = '*'
 
+        ## QHull has a mix of C and C++ source files
+        ## Setuptools will apply the same flags to all files
+        ## GCC warns about passing -std=c++11 for C files

+        def patched__compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
+            # remove c++ specific options for C files
+            if src.endswith('.c'):
+                extra_postargs = [arg for arg in extra_postargs if not arg.startswith("-std")]
+            return original__compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
+        # 3. monkey patch the method
+        self.compiler._compile = patched__compile
