[Bug #668662] Patch from Pearu Pearson: if a C source file is

    specified with an absolute path, the object file is also
    written to an absolute path.  The patch drops the drive and
    leading '/' from the source path, so a path like /path/to/foo.c
    results in an object file like build/temp.i686linux/path/to/foo.o.

ccompiler.py

@@ -932,6 +932,8 @@ def object_filenames(self, source_filenames, strip_dir=0, output_dir=''):
         obj_names = []
         for src_name in source_filenames:
             base, ext = os.path.splitext(src_name)
+            base = os.path.splitdrive(base)[1] # Chop off the drive
+            base = base[os.path.isabs(base):]  # If abs, chop off leading /
             if ext not in self.src_extensions:
                 raise UnknownFileError, \
                       "unknown file type '%s' (from '%s')" % (ext, src_name)