Introduce '--no-duplicate-basename-check' option to disable the check of duplicate basenames

test/same-source-file-name/gyptest-shared.py

Index: test/same-source-file-name/gyptest-shared.py
diff --git a/test/same-source-file-name/gyptest-fail-shared.py b/test/same-source-file-name/gyptest-shared.py
similarity index 43%
rename from test/same-source-file-name/gyptest-fail-shared.py
rename to test/same-source-file-name/gyptest-shared.py
index 5b57826188238087deccdacfc118afcfb5234669..a57eb6159e492c7f8cc58481027eae82ad2b15c3 100755
--- a/test/same-source-file-name/gyptest-fail-shared.py
+++ b/test/same-source-file-name/gyptest-shared.py
@@ -9,10 +9,23 @@ Checks that gyp fails on shared_library targets which have several files with
 the same basename.
 """
 
+import os
+
 import TestGyp
 
 test = TestGyp.TestGyp()
 
+# Fails by default for the compatibility with Visual C++ 2008 generator.
+# TODO: Update expected behavior when these legacy generators are deprecated.
 test.run_gyp('double-shared.gyp', chdir='src', status=1, stderr=None)
 
+if ((test.format == 'msvs') and
+       (int(os.environ.get('GYP_MSVS_VERSION', 2010)) < 2010)):
+  test.run_gyp('double-shared.gyp', '--no-duplicate-basename-check',
+               chdir='src', status=0, stderr=None)
+else:
+  test.run_gyp('double-shared.gyp', '--no-duplicate-basename-check',
+               chdir='src')
+  test.build('double-shared.gyp', test.ALL, chdir='src')
+
 test.pass_test()