Honor $CC/$CC_host and friends in make generator.

test/compiler-override/gyptest-compiler-global-settings.py

+#!/usr/bin/env python
+# Copyright (c) 2012 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+"""
+Verifies that make_global_settings can be used to override the
+compiler settings.
+"""
+
+import TestGyp
+import os
+import copy
+import sys
+from string import Template
+
+if sys.platform == 'win32':
+  formats = ['make']
+else:
+  formats = ['ninja', 'make']
+
+test = TestGyp.TestGyp(formats=formats)
+
+gypfile = 'compiler-global-settings.gyp'
+
+replacements = { 'PYTHON': '/usr/bin/python', 'PWD': os.getcwd()}
+
+# Process the .in gyp file to produce the final gyp file
+# since we need to include absolute paths in the make_global_settings
+# section.
+replacements['TOOLSET'] = 'target'
+s = Template(open(gypfile + '.in').read())
+output = open(gypfile, 'w')
+output.write(s.substitute(replacements))
+output.close()
+
+test.run_gyp(gypfile)
+test.build(gypfile)
+test.must_contain_all_lines(test.stdout(), ['my_cc.py', 'my_cxx.py', 'FOO'])
+
+# Same again but with the host toolset.
+replacements['TOOLSET'] = 'host'
+s = Template(open(gypfile + '.in').read())
+output = open(gypfile, 'w')
+output.write(s.substitute(replacements))
+output.close()
+
+test.run_gyp(gypfile)
+test.build(gypfile)
+test.must_contain_all_lines(test.stdout(), ['my_cc.py', 'my_cxx.py', 'BAR'])
+
+test.pass_test()