зеркало из https://github.com/microsoft/vcpkg.git
66 строки
2.6 KiB
CMake
66 строки
2.6 KiB
CMake
#[===[.md:
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# z_vcpkg_get_cmake_vars
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**Only for internal use in vcpkg helpers. Behavior and arguments will change without notice.**
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Runs a cmake configure with a dummy project to extract certain cmake variables
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## Usage
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```cmake
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z_vcpkg_get_cmake_vars(<out-var>)
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```
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`z_vcpkg_get_cmake_vars(cmake_vars_file)` sets `<out-var>` to
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a path to a generated CMake file, with the detected `CMAKE_*` variables
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re-exported as `VCPKG_DETECTED_*`.
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## Notes
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Avoid usage in portfiles.
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All calls to `z_vcpkg_get_cmake_vars` will result in the same output file;
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the output file is not generated multiple times.
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## Examples
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* [vcpkg_configure_make](https://github.com/Microsoft/vcpkg/blob/master/scripts/cmake/vcpkg_configure_make.cmake)
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### Basic Usage
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```cmake
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z_vcpkg_get_cmake_vars(cmake_vars_file)
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include("${cmake_vars_file}")
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message(STATUS "detected CXX flags: ${VCPKG_DETECTED_CXX_FLAGS}")
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```
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#]===]
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function(z_vcpkg_get_cmake_vars out_file)
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cmake_parse_arguments(PARSE_ARGV 1 arg "" "" "")
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if(DEFINED arg_UNPARSED_ARGUMENTS)
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message(FATAL_ERROR "${CMAKE_CURRENT_FUNCTION} was passed extra arguments: ${arg_UNPARSED_ARGUMENTS}")
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endif()
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if(NOT DEFINED CACHE{Z_VCPKG_GET_CMAKE_VARS_FILE})
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set(Z_VCPKG_GET_CMAKE_VARS_FILE "${CURRENT_BUILDTREES_DIR}/cmake-vars-${TARGET_TRIPLET}.cmake.log"
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CACHE PATH "The file to include to access the CMake variables from a generated project.")
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vcpkg_configure_cmake(
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SOURCE_PATH "${SCRIPTS}/get_cmake_vars"
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OPTIONS_DEBUG "-DVCPKG_OUTPUT_FILE:PATH=${CURRENT_BUILDTREES_DIR}/cmake-vars-${TARGET_TRIPLET}-dbg.cmake.log"
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OPTIONS_RELEASE "-DVCPKG_OUTPUT_FILE:PATH=${CURRENT_BUILDTREES_DIR}/cmake-vars-${TARGET_TRIPLET}-rel.cmake.log"
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PREFER_NINJA
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LOGNAME get-cmake-vars-${TARGET_TRIPLET}
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Z_GET_CMAKE_VARS_USAGE # ignore vcpkg_cmake_configure, be quiet, don't set variables...
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)
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set(include_string "")
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if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "release")
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string(APPEND include_string "include(\"\${CMAKE_CURRENT_LIST_DIR}/cmake-vars-${TARGET_TRIPLET}-rel.cmake.log\")\n")
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endif()
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if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "debug")
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string(APPEND include_string "include(\"\${CMAKE_CURRENT_LIST_DIR}/cmake-vars-${TARGET_TRIPLET}-dbg.cmake.log\")\n")
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endif()
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file(WRITE "${Z_VCPKG_GET_CMAKE_VARS_FILE}" "${include_string}")
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endif()
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set("${out_file}" "${Z_VCPKG_GET_CMAKE_VARS_FILE}" PARENT_SCOPE)
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endfunction()
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