[gobject-introspection] scanner: make sure we pass CFLAGS to cpp

[Ryan Lortie <desrt src gnome org>]

commit cbafcdb323307fd6bb5e48b44167fd995dc933a1
Author: Ryan Lortie <desrt desrt ca>
Date:   Sun Dec 8 11:48:08 2013 -0500

    scanner: make sure we pass CFLAGS to cpp
    
    When doing the source scanning in giscanner, make sure we pass the
    user's CFLAGS environment variable to the compiler, as we do for the
    dumper.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=720063

 giscanner/sourcescanner.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/giscanner/sourcescanner.py b/giscanner/sourcescanner.py
index a115158..9a8bd41 100644
--- a/giscanner/sourcescanner.py
+++ b/giscanner/sourcescanner.py
@@ -289,6 +289,7 @@ class SourceScanner(object):
             # Note that the generated dumper program is
             # still built and linked by Visual C++.
             cpp_args = ['gcc']
+        cpp_args += os.environ.get('CFLAGS', '').split()
         cpp_args += ['-E', '-C', '-I.', '-']
         cpp_args += self._cpp_options