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@@ -24,8 +24,7 @@ IF(ZLIB_FOUND)
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PATHS /usr/lib /usr/local/lib
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)
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- IF (PNG_LIBRARY)
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- IF (PNG_PNG_INCLUDE_DIR)
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+ IF (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
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# png.h includes zlib.h. Sigh.
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SET(PNG_INCLUDE_DIR ${PNG_PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
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SET(PNG_LIBRARIES ${PNG_LIBRARY} ${ZLIB_LIBRARY})
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@@ -39,7 +38,8 @@ IF(ZLIB_FOUND)
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ENDIF(BUILD_SHARED_LIBS)
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ENDIF (CYGWIN)
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- ENDIF (PNG_PNG_INCLUDE_DIR)
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- ENDIF (PNG_LIBRARY)
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+ ENDIF (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
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ENDIF(ZLIB_FOUND)
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+
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+MARK_AS_ADVANCED(PNG_PNG_INCLUDE_DIR PNG_LIBRARY )
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