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AC_CHECK_PROGS([DOXYGEN], [doxygen])
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AC_CHECK_PROGS([PERL], [perl])
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AC_CHECK_PROGS([DPKG_GENSYMBOLS], [dpkg-gensymbols], [:])
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AC_CHECK_PROGS([SPHINXBUILD], [sphinx-build], [:])
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AS_IF([test "x${SPHINXBUILD}" != "x:"],[
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AC_CACHE_CHECK([if sphinx is new enough],[ac_cv_recent_sphinx],[