Mesa (master): scons: fix write_git_sha1_h_file() issue on Windows

[Brian Paul]

Module: Mesa
Branch: master
Commit: e112287474e225969fb10e6bc744d9c48a853fc6
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e112287474e225969fb10e6bc744d9c48a853fc6

Author: Brian Paul <brianp at vmware.com>
Date:   Wed Sep 28 09:04:03 2011 -0600

scons: fix write_git_sha1_h_file() issue on Windows

Unlike on Unix, os.rename(src, dst) will fail on Windows if the dst file
already exists.  Remove it first.

---

 src/mesa/SConscript |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/mesa/SConscript b/src/mesa/SConscript
index 595f8fc..3d5d37a 100644
--- a/src/mesa/SConscript
+++ b/src/mesa/SConscript
@@ -488,6 +488,8 @@ def write_git_sha1_h_file(filename):
     if not os.path.exists(filename) or not filecmp.cmp(tempfile, filename):
         # The filename does not exist or it's different from the new file,
         # so replace old file with new.
+        if os.path.exists(filename):
+            os.remove(filename)
         os.rename(tempfile, filename)
     return