Misc fixes for Windows.

Most of these changes have to do with how python scripts are invoked.

For Linux, 'Popen([EMCC] + args)' works because the first line in emcc
is '#!/usr/bin/env python'. On Windows, the python interpreter has
to be explicitly invoked, e.g. 'Popen(['python', EMCC] + args)'. Note
that there is no harm in explicitly invoking the python interpreter
on Linux, so this works on both platforms.

For Windows, execvp() behaves differently than on Linux:
http://mail.python.org/pipermail/python-list/2002-July/763863.html
http://msdn.microsoft.com/en-us/library/3xw6zy53.aspx

This causes many strange things to happen as the parent process
terminated before its children. In this change the use of execvp()
has been replaced with subprocess.call().

This change also fixes some code that assumed that the path separator
always is '/', but for Windows it is '\'. And where the path module
can be required, we use path.normalize() and path.resolve() to check
if a filename is absolute in a platform agnostic manner.

1 files changed, 2 insertions, 2 deletions

diff --git a/emar b/emar
index e64cd8b9..46bc65d7 100755
--- a/emar
+++ b/emar
@@ -7,7 +7,7 @@ emar - ar helper script
 This script acts as a frontend replacement for ar. See emcc.
 '''
 
-import os, sys
+import os, subprocess, sys
 from tools import shared
 
 DEBUG = os.environ.get('EMCC_DEBUG')
@@ -18,5 +18,5 @@ if DEBUG:
   print >> sys.stderr, 'emar:', sys.argv, '  ==>  ', newargs
 
 if len(newargs) > 2:
-  os.execvp(shared.LLVM_AR, newargs)
+  subprocess.call(newargs)