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34 lines
1.2 KiB
CMake
34 lines
1.2 KiB
CMake
# flex
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# execute FindFLEX script by "find_package (Flex)" is required to define FLEX_TARGET macro
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# delete obsolete 3RDPARTY_FLEX_EXECUTABLE cache variable (not used anymore)
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unset (3RDPARTY_FLEX_EXECUTABLE CACHE)
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# delete FLEX_EXECUTABLE cache variable if it is empty, otherwise find_package will fail
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# without reasonable diagnostic
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if (NOT FLEX_EXECUTABLE OR NOT EXISTS "${FLEX_EXECUTABLE}")
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unset (FLEX_EXECUTABLE CACHE)
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endif()
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if (NOT FLEX_INCLUDE_DIR OR NOT EXISTS "${FLEX_INCLUDE_DIR}")
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unset (FLEX_INCLUDE_DIR CACHE)
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endif()
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# Add paths to 3rdparty subfolders containing name "flex" to CMAKE_PROGRAM_PATH and
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# CMAKE_INCLUDE_PATH variables to make these paths searched by find_package
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if (3RDPARTY_DIR)
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file (GLOB FLEX_PATHS LIST_DIRECTORIES true "${3RDPARTY_DIR}/*flex*")
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foreach (candidate_path ${FLEX_PATHS})
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if (IS_DIRECTORY ${candidate_path})
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list (APPEND CMAKE_PROGRAM_PATH ${candidate_path})
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list (APPEND CMAKE_INCLUDE_PATH ${candidate_path})
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endif()
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endforeach()
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endif()
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find_package (FLEX 2.6.4)
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if (NOT FLEX_FOUND OR NOT FLEX_INCLUDE_DIR OR NOT EXISTS "${FLEX_INCLUDE_DIR}/FlexLexer.h")
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list (APPEND 3RDPARTY_NOT_INCLUDED FLEX_INCLUDE_DIR)
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endif()
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