95 lines
4.3 KiB
CMake
95 lines
4.3 KiB
CMake
# - Additional help finding search paths on MinGW distributions, including MSYS2.
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#
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# Much of this is really more in the purview of CMake or the packages of CMake for
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# those distributions, but if I can centralize/simplify the pain here, it's worth doing.
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#
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# Variables: (all are internal cache variables)
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# MINGWSEARCH_INCLUDE_DIRS - use under PATHS in your find_path() commands
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# MINGWSEARCH_LIBRARY_DIRS - use under PATHS in your find_library() commands
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# MINGWSEARCH_PREFIXES - suitable for temporary use in CMAKE_FIND_ROOT_PATH or CMAKE_PREFIX_PATH.
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# MINGWSEARCH_TARGET_TRIPLE - something like x86_64-w64-mingw32 or i686-w64-mingw32, use as you see fit.
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#
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# Original Author:
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# 2016 Ryan Pavlik <ryan@sensics.com> <ryan.pavlik@gmail.com>
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#
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# Copyright Sensics, Inc. 2016.
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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if(MINGW AND NOT MINGWSEARCH_COMPLETED)
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###
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# Helper function
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###
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function(_mingwsearch_conditional_add _var _path)
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#message(STATUS "conditional add to ${_var}: ${_path}")
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if(("${_path}" MATCHES "registry") OR (NOT IS_DIRECTORY "${_path}"))
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# Path invalid - do not add
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return()
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endif()
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list(FIND ${_var} "${_path}" _idx)
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if(_idx GREATER -1)
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# Path already in list - do not add
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return()
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endif()
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# Not yet in the list, so we'll add it
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list(APPEND ${_var} "${_path}")
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set(${_var} ${${_var}} PARENT_SCOPE)
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endfunction()
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# Clear the working variables.
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set(MINGWSEARCH_INCLUDE_DIRS_WORK)
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set(MINGWSEARCH_LIBRARY_DIRS_WORK)
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set(MINGWSEARCH_PREFIXES_WORK)
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set(_mingw_target_triple)
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# Try to find the string like x86_64-w64-mingw32 by parsing the implicit link directories...
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# TODO this is a hack that either should be resolved in CMake or in MSYS2's package of CMake.
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foreach(_link_dir ${CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES})
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_mingwsearch_conditional_add(MINGWSEARCH_LIBRARY_DIRS_WORK "${_link_dir}")
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if("${_link_dir}" MATCHES "/([^/]*-mingw32)/lib")
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set(_mingw_target_triple ${CMAKE_MATCH_1})
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get_filename_component(_mingw_internal_basedir "${_link_dir}" PATH)
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# Try adding the parallel include dir
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if(IS_DIRECTORY "${_mingw_internal_basedir}/include")
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_mingwsearch_conditional_add(MINGWSEARCH_INCLUDE_DIRS_WORK "${_mingw_internal_basedir}/include")
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_mingwsearch_conditional_add(MINGWSEARCH_PREFIXES_WORK "${_mingw_internal_basedir}")
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endif()
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if(NOT CMAKE_CROSSCOMPILING)
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# Try going up a level, since the directory with the target is usually a sibling to the main prefix.
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get_filename_component(_mingw_main_basedir_candidate "${_mingw_internal_basedir}/.." ABSOLUTE)
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if(IS_DIRECTORY "${_mingw_main_basedir_candidate}/include" AND NOT ("${_mingw_main_basedir_candidate}" STREQUAL "${_mingw_internal_basedir}"))
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# If we could go up a level, add that include dir too.
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_mingwsearch_conditional_add(MINGWSEARCH_INCLUDE_DIRS_WORK "${_mingw_main_basedir_candidate}/include")
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_mingwsearch_conditional_add(MINGWSEARCH_PREFIXES_WORK "${_mingw_main_basedir_candidate}")
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endif()
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endif()
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endif()
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endforeach()
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###
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# Output results.
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###
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if(MINGWSEARCH_INCLUDE_DIRS_WORK)
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set(MINGWSEARCH_INCLUDE_DIRS "${MINGWSEARCH_INCLUDE_DIRS_WORK}" CACHE INTERNAL "" FORCE)
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#message(STATUS "MINGWSEARCH_INCLUDE_DIRS ${MINGWSEARCH_INCLUDE_DIRS}")
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endif()
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if(MINGWSEARCH_LIBRARY_DIRS_WORK)
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set(MINGWSEARCH_LIBRARY_DIRS "${MINGWSEARCH_LIBRARY_DIRS_WORK}" CACHE INTERNAL "" FORCE)
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#message(STATUS "MINGWSEARCH_LIBRARY_DIRS ${MINGWSEARCH_LIBRARY_DIRS}")
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endif()
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if(MINGWSEARCH_PREFIXES_WORK)
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set(MINGWSEARCH_PREFIXES "${MINGWSEARCH_PREFIXES_WORK}" CACHE INTERNAL "" FORCE)
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#message(STATUS "MINGWSEARCH_PREFIXES ${MINGWSEARCH_PREFIXES}")
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endif()
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if(_mingw_target_triple)
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set(MINGWSEARCH_TARGET_TRIPLE ${_mingw_target_triple} CACHE INTERNAL "" FORCE)
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#message(STATUS "MINGWSEARCH_TARGET_TRIPLE ${MINGWSEARCH_TARGET_TRIPLE}")
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endif()
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set(MINGWSEARCH_COMPLETED TRUE CACHE INTERNAL "" FORCE)
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endif()
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