Merge "Mark tests as unsupported for non-Linux hosts."

tests/build/flto/test_config.py

-def match_unsupported(abi, platform, toolchain, subtest=None):
+# Shut up a warning about us not being a real package.
+from __future__ import absolute_import
+import platform
+
+
+def match_unsupported(abi, _platform, toolchain, _subtest=None):
     # Clang does LTO via gold plugin, but gold doesn't support MIPS yet.
     if toolchain == 'clang' and abi.startswith('mips'):
         return '{} {}'.format(toolchain, abi)
+
+    # We only support LTO from Linux.
+    if platform.system() != 'Linux':
+        return platform.system()
+
+    return None

tests/build/issue36131-flto-c++11/test_config.py

-def match_unsupported(abi, platform, toolchain, subtest=None):
+# Shut up a warning about us not being a real package.
+from __future__ import absolute_import
+import platform
+
+
+def match_unsupported(abi, _platform, toolchain, _subtest=None):
     # Clang does LTO via gold plugin, but gold doesn't support MIPS yet.
     if toolchain == 'clang' and abi.startswith('mips'):
         return '{} {}'.format(toolchain, abi)
+
+    # We only support LTO from Linux.
+    if platform.system() != 'Linux':
+        return platform.system()
+
+    return None