commit 6925adbb45889dc5277b1001e4ff33342c8e0821
Author: Owen W. Taylor <otaylor@fishsoup.net>
Date:   Thu Sep 30 17:57:44 2010 -0400

    Add -export-dynamic when compiling with libtool
    
    In some cases (such as introspecting a convenience library),
    we need to dlsym() modules in the binary we compile, so we
    need to add -export-dynamic to the link line.

diff --git a/giscanner/dumper.py b/giscanner/dumper.py
index 26ddd7b..2da95ac 100644
--- a/giscanner/dumper.py
+++ b/giscanner/dumper.py
@@ -192,6 +192,8 @@ class DumpCompiler(object):
             args.append('--silent')
 
         args.extend([self._linker_cmd, '-o', output])
+        if libtool:
+            args.append('-export-dynamic')
 
         cflags = os.environ.get('CFLAGS')
         if (cflags):