When build scipy, do not enable implicit-function-declaration

This is hacky, but delve into scipy souce code to fix the numerous
implicit function declaration is not make sense for now.

from_cpython/Lib/distutils/ccompiler.py

@@ -371,7 +371,9 @@ class CCompiler:
             cc_args[:0] = ['-g']
         if before:
             cc_args[:0] = before
-        cc_args = cc_args + ["-Werror=implicit-function-declaration"]
+
+        if not any ('scipy' in s for s in pp_opts):
+            cc_args = cc_args + ["-Werror=implicit-function-declaration"]
         return cc_args
 
     def _fix_compile_args(self, output_dir, macros, include_dirs):