1 files changed, 106 insertions, 0 deletions
diff --git a/share/cmake-3.17/Modules/CheckLanguage.cmake b/share/cmake-3.17/Modules/CheckLanguage.cmake
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index 0000000..997cc8d
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+++ b/share/cmake-3.17/Modules/CheckLanguage.cmake
@@ -0,0 +1,106 @@
+# 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 :command:`enable_language`
+such as ``Fortran``.  If :variable:`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 :variable:`CMAKE_<LANG>_COMPILER`
+as the compiler that was found, or ``NOTFOUND`` if the language cannot be
+enabled. For CUDA which can have an explicit host compiler, the cache
+:variable:`CMAKE_CUDA_HOST_COMPILER` variable will be set if it was required
+for compilation.
+
+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 ${lang} compiler")
+    message(CHECK_START "${_desc}")
+    file(REMOVE_RECURSE ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/Check${lang})
+
+    set(extra_compiler_variables)
+    if(lang STREQUAL CUDA)
+      set(extra_compiler_variables "set(CMAKE_CUDA_HOST_COMPILER \\\"\${CMAKE_CUDA_HOST_COMPILER}\\\")")
+    endif()
+
+    set(content
+      "cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(Check${lang} ${lang})
+file(WRITE \"\${CMAKE_CURRENT_BINARY_DIR}/result.cmake\"
+  \"set(CMAKE_${lang}_COMPILER \\\"\${CMAKE_${lang}_COMPILER}\\\")\\n\"
+  \"${extra_compiler_variables}\\n\"
+  )"
+    )
+
+    file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/Check${lang}/CMakeLists.txt"
+      "${content}")
+    if(CMAKE_GENERATOR_INSTANCE)
+      set(_D_CMAKE_GENERATOR_INSTANCE "-DCMAKE_GENERATOR_INSTANCE:INTERNAL=${CMAKE_GENERATOR_INSTANCE}")
+    else()
+      set(_D_CMAKE_GENERATOR_INSTANCE "")
+    endif()
+    if(CMAKE_GENERATOR MATCHES "^(Xcode$|Green Hills MULTI$|Visual Studio)")
+      set(_D_CMAKE_MAKE_PROGRAM "")
+    else()
+      set(_D_CMAKE_MAKE_PROGRAM "-DCMAKE_MAKE_PROGRAM:FILEPATH=${CMAKE_MAKE_PROGRAM}")
+    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}
+                                 ${_D_CMAKE_MAKE_PROGRAM}
+      OUTPUT_VARIABLE output
+      ERROR_VARIABLE output
+      RESULT_VARIABLE result
+      )
+    include(${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")
+      set(_CHECK_COMPILER_STATUS CHECK_PASS)
+    else()
+      set(CMAKE_${lang}_COMPILER NOTFOUND)
+      set(_CHECK_COMPILER_STATUS CHECK_FAIL)
+      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+        "${_desc} failed with the following output:\n"
+        "${output}\n")
+    endif()
+    message(${_CHECK_COMPILER_STATUS} "${CMAKE_${lang}_COMPILER}")
+    set(CMAKE_${lang}_COMPILER "${CMAKE_${lang}_COMPILER}" CACHE FILEPATH "${lang} compiler")
+    mark_as_advanced(CMAKE_${lang}_COMPILER)
+
+    if(CMAKE_${lang}_HOST_COMPILER)
+      message(STATUS "Looking for a ${lang} host compiler - ${CMAKE_${lang}_HOST_COMPILER}")
+      set(CMAKE_${lang}_HOST_COMPILER "${CMAKE_${lang}_HOST_COMPILER}" CACHE FILEPATH "${lang} host compiler")
+      mark_as_advanced(CMAKE_${lang}_HOST_COMPILER)
+    endif()
+
+  endif()
+endmacro()