Allow enabling CCache through an env variable. This helps enable/disable the option on buildbots.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@233659 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -222,7 +222,8 @@ class Configuration(object):
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self.execute_external = not use_lit_shell
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def configure_ccache(self):
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use_ccache = self.get_lit_bool('use_ccache', False)
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use_ccache_default = os.environ.get('LIBCXX_USE_CCACHE') is not None
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use_ccache = self.get_lit_bool('use_ccache', use_ccache_default)
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if use_ccache:
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self.cxx.use_ccache = True
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self.lit_config.note('enabling ccache')
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