python/build/boost.py: touch boost/version.hpp to avoid reinstalling all the time
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@ -21,3 +21,8 @@ class BoostProject(Project):
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dest = os.path.join(includedir, 'boost')
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shutil.rmtree(dest, ignore_errors=True)
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shutil.copytree(os.path.join(src, 'boost'), dest)
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# touch the boost/version.hpp file to ensure it's newer than
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# the downloaded Boost tarball, to avoid reinstalling Boost on
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# every run
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os.utime(os.path.join(toolchain.install_prefix, self.installed))
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