Script to fix install names in ICU libs on OS X

setup/installer/osx/fix_icu.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
+
+# The ICU build system does not put correct install names in the dylibs it
+# generates. This script will fix that.
+
+import os, glob, subprocess, re
+
+SW = os.environ['SW']
+cc = subprocess.check_call
+
+icu_libs = {os.path.abspath(os.path.realpath(x)) for x in glob.glob(os.path.join(SW, 'lib', 'libicu*.dylib'))}
+
+def get_install_name(lib):
+    return subprocess.check_output(['otool', '-D', lib]).decode('utf-8').splitlines()[-1]
+
+def get_dependencies(lib):
+    return [x.strip().partition(' ')[0] for x in
+            subprocess.check_output(['otool', '-L', lib]).decode('utf-8').splitlines()[2:]]
+
+for lib in icu_libs:
+    install_name = os.path.basename(lib)
+    print ('Fixing install names in', install_name)
+    m = re.match(r'libicu[a-z0-9]+\.\d+', install_name)
+    install_name = m.group() + '.dylib'  # We only want the major version in the install name
+    new_install_name = os.path.join(os.path.dirname(lib), install_name)
+    cc(['install_name_tool', '-id', new_install_name, lib])
+    for dep in get_dependencies(lib):
+        name = os.path.basename(dep)
+        if name.startswith('libicu'):
+            ndep = os.path.join(SW, 'lib', name)
+            if ndep != dep:
+                cc(['install_name_tool', '-change', dep, ndep, lib])
+
+