3 # execute FindFLEX script by "find_package (Flex)" is required to define FLEX_TARGET macro
5 # delete obsolete 3RDPARTY_FLEX_EXECUTABLE cache variable (not used anymore)
6 unset (3RDPARTY_FLEX_EXECUTABLE CACHE)
8 # delete FLEX_EXECUTABLE cache variable if it is empty, otherwise find_package will fail
9 # without reasonable diagnostic
10 if (NOT FLEX_EXECUTABLE OR NOT EXISTS "${FLEX_EXECUTABLE}")
11 unset (FLEX_EXECUTABLE CACHE)
13 if (NOT FLEX_INCLUDE_DIR OR NOT EXISTS "${FLEX_INCLUDE_DIR}")
14 unset (FLEX_INCLUDE_DIR CACHE)
17 # Add paths to 3rdparty subfolders containing name "flex" to CMAKE_PROGRAM_PATH and
18 # CMAKE_INCLUDE_PATH variables to make these paths searhed by find_package
20 file (GLOB FLEX_PATHS LIST_DIRECTORIES true "${3RDPARTY_DIR}/*flex*")
21 foreach (candidate_path ${FLEX_PATHS})
22 if (IS_DIRECTORY ${candidate_path})
23 list (APPEND CMAKE_PROGRAM_PATH ${candidate_path})
24 list (APPEND CMAKE_INCLUDE_PATH ${candidate_path})
29 # flex 2.5.37 is required because closest known lower version, 2.5.3 from WOK 6.8.0,
30 # generates code which is unusable on Windows (includes unistd.h without any way to avoid this)
31 find_package (FLEX 2.5.37)
33 if (NOT FLEX_FOUND OR NOT FLEX_INCLUDE_DIR OR NOT EXISTS "${FLEX_INCLUDE_DIR}/FlexLexer.h")
34 list (APPEND 3RDPARTY_NOT_INCLUDED FLEX_INCLUDE_DIR)