Table of file names with relative paths.

The previous commit reveals too much information about the system.  With
this change only modules of the processed package are expanded.  The
expanded path reaches no deeper than the package's root.

Cython/Compiler/ModuleNode.py

@@ -683,11 +683,22 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
         code.putln_openmp("#include <omp.h>")
 
     def generate_filename_table(self, code):
+        import os.path as path
+
+        full_module_path = path.join(*self.full_module_name.split('.'))
+        module_abspath = path.splitext(path.abspath(
+            self.compilation_source.source_desc.get_filenametable_entry() ))[0]
+        module_relpath = module_abspath[:-len(full_module_path)]
+
         code.putln("")
         code.putln("static const char *%s[] = {" % Naming.filetable_cname)
         if code.globalstate.filename_list:
             for source_desc in code.globalstate.filename_list:
-                filename = os.path.abspath(source_desc.get_filenametable_entry())
+                file_abspath = path.abspath(source_desc.get_filenametable_entry())
+                if file_abspath.startswith(module_relpath):
+                    filename = file_abspath[len(module_relpath):]
+                else:
+                    filename = path.basename(file_abspath)
                 escaped_filename = filename.replace("\\", "\\\\").replace('"', r'\"')
                 code.putln('"%s",' % escaped_filename)
         else: