Include an empty body when checking for a header file
(Bugfix candidate for 2.2, and likely 2.1 as well)
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@ -346,7 +346,8 @@ class config (Command):
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exists and can be found by the preprocessor; return true if so,
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false otherwise.
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"""
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return self.try_cpp(headers=[header], include_dirs=include_dirs)
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return self.try_cpp(body="/* No body */", headers=[header],
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include_dirs=include_dirs)
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# class config
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