diff options
Diffstat (limited to 'Modules/CMakeDetermineCompilerId.cmake')
| -rw-r--r-- | Modules/CMakeDetermineCompilerId.cmake | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake index 7efe739..347106e 100644 --- a/Modules/CMakeDetermineCompilerId.cmake +++ b/Modules/CMakeDetermineCompilerId.cmake @@ -735,3 +735,38 @@ function(CMAKE_DETERMINE_MSVC_SHOWINCLUDES_PREFIX lang userflags) set(CMAKE_${lang}_CL_SHOWINCLUDES_PREFIX "" PARENT_SCOPE) endif() endfunction() + +function(CMAKE_DIAGNOSE_UNSUPPORTED_CLANG lang envvar) + if(NOT CMAKE_HOST_WIN32 OR CMAKE_GENERATOR MATCHES "Visual Studio" OR + NOT "${CMAKE_${lang}_COMPILER_ID};${CMAKE_${lang}_SIMULATE_ID}" STREQUAL "Clang;MSVC") + return() + endif() + + # Test whether a GNU-like command-line option works. + execute_process(COMMAND "${CMAKE_${lang}_COMPILER}" --version + RESULT_VARIABLE _clang_result + OUTPUT_VARIABLE _clang_stdout + ERROR_VARIABLE _clang_stderr) + if(NOT _clang_result EQUAL 0) + return() + endif() + + # Help the user configure the environment to use the MSVC-like Clang. + string(CONCAT _msg + "The Clang compiler tool\n" + " \"${CMAKE_${lang}_COMPILER}\"\n" + "targets the MSVC ABI but has a GNU-like command-line interface. " + "This is not supported. " + "Use 'clang-cl' instead, e.g. by setting '${envvar}=clang-cl' in the environment." + ) + execute_process(COMMAND rc -help + RESULT_VARIABLE _rc_result + OUTPUT_VARIABLE _rc_stdout + ERROR_VARIABLE _rc_stderr) + if(NOT _rc_result EQUAL 0) + string(APPEND _msg " " + "Furthermore, use the MSVC command-line environment." + ) + endif() + message(FATAL_ERROR "${_msg}") +endfunction() |