mirror of
https://github.com/crystalidea/qt-build-tools.git
synced 2024-11-27 13:49:04 +08:00
80 lines
2.8 KiB
CMake
80 lines
2.8 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
|
|
# file Copyright.txt or https://cmake.org/licensing for details.
|
|
|
|
#[=======================================================================[.rst:
|
|
CheckLanguage
|
|
-------------
|
|
|
|
Check if a language can be enabled
|
|
|
|
Usage:
|
|
|
|
::
|
|
|
|
check_language(<lang>)
|
|
|
|
where <lang> is a language that may be passed to enable_language()
|
|
such as "Fortran". If CMAKE_<lang>_COMPILER is already defined the
|
|
check does nothing. Otherwise it tries enabling the language in a
|
|
test project. The result is cached in CMAKE_<lang>_COMPILER as the
|
|
compiler that was found, or NOTFOUND if the language cannot be
|
|
enabled.
|
|
|
|
Example:
|
|
|
|
::
|
|
|
|
check_language(Fortran)
|
|
if(CMAKE_Fortran_COMPILER)
|
|
enable_language(Fortran)
|
|
else()
|
|
message(STATUS "No Fortran support")
|
|
endif()
|
|
#]=======================================================================]
|
|
|
|
include_guard(GLOBAL)
|
|
|
|
macro(check_language lang)
|
|
if(NOT DEFINED CMAKE_${lang}_COMPILER)
|
|
set(_desc "Looking for a ${lang} compiler")
|
|
message(STATUS ${_desc})
|
|
file(REMOVE_RECURSE ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/Check${lang})
|
|
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/Check${lang}/CMakeLists.txt"
|
|
"cmake_minimum_required(VERSION ${CMAKE_VERSION})
|
|
project(Check${lang} ${lang})
|
|
file(WRITE \"\${CMAKE_CURRENT_BINARY_DIR}/result.cmake\"
|
|
\"set(CMAKE_${lang}_COMPILER \\\"\${CMAKE_${lang}_COMPILER}\\\")\\n\"
|
|
)
|
|
")
|
|
if(CMAKE_GENERATOR_INSTANCE)
|
|
set(_D_CMAKE_GENERATOR_INSTANCE "-DCMAKE_GENERATOR_INSTANCE:INTERNAL=${CMAKE_GENERATOR_INSTANCE}")
|
|
else()
|
|
set(_D_CMAKE_GENERATOR_INSTANCE "")
|
|
endif()
|
|
execute_process(
|
|
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/Check${lang}
|
|
COMMAND ${CMAKE_COMMAND} . -G ${CMAKE_GENERATOR}
|
|
-A "${CMAKE_GENERATOR_PLATFORM}"
|
|
-T "${CMAKE_GENERATOR_TOOLSET}"
|
|
${_D_CMAKE_GENERATOR_INSTANCE}
|
|
OUTPUT_VARIABLE output
|
|
ERROR_VARIABLE output
|
|
RESULT_VARIABLE result
|
|
)
|
|
include(${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/Check${lang}/result.cmake OPTIONAL)
|
|
if(CMAKE_${lang}_COMPILER AND "${result}" STREQUAL "0")
|
|
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
|
|
"${_desc} passed with the following output:\n"
|
|
"${output}\n")
|
|
else()
|
|
set(CMAKE_${lang}_COMPILER NOTFOUND)
|
|
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
|
|
"${_desc} failed with the following output:\n"
|
|
"${output}\n")
|
|
endif()
|
|
message(STATUS "${_desc} - ${CMAKE_${lang}_COMPILER}")
|
|
set(CMAKE_${lang}_COMPILER "${CMAKE_${lang}_COMPILER}" CACHE FILEPATH "${lang} compiler")
|
|
mark_as_advanced(CMAKE_${lang}_COMPILER)
|
|
endif()
|
|
endmacro()
|