| function(compare_compiler_version lang) |
| cmake_policy(GET CMP0129 LCC_FALLBACK_MODE) |
| if(${CMAKE_${lang}_COMPILER} STREQUAL "LCC" OR ${CMAKE_${lang}_COMPILER} STREQUAL "GNU") |
| execute_process(COMMAND ${CMAKE_${lang}_COMPILER} --version OUTPUT_VARIABLE output) |
| if("${output}" MATCHES [[lcc:([0-9]+.[0-9]+.([0-9]+)):]]) |
| set(native_version ${CMAKE_MATCH_1}) |
| else() |
| message(FATAL_ERROR "Can not identify native LCC version for language ${lang}.") |
| endif() |
| if("${output}" MATCHES [[\(GCC\) ([0-9]+.[0-9]+.([0-9]+)) compatible]]) |
| set(simulated_version ${CMAKE_MATCH_1}) |
| else() |
| message(FATAL_ERROR "Can not identify simulated GNU version for language ${lang}.") |
| endif() |
| message(STATUS "Compiler native version is ${native_version}, simulated version is ${simulated_version}.") |
| if("${LCC_FALLBACK_MODE}" STREQUAL "NEW") |
| if(NOT "${CMAKE_${lang}_COMPILER_ID}" STREQUAL "LCC") |
| message(FATAL_ERROR "Policy is in NEW mode, but compiler identification is ${CMAKE_${lang}_COMPILER_ID} instead of LCC.") |
| endif() |
| if(NOT "${CMAKE_${lang}_COMPILER_VERSION}" STREQUAL "${native_version}") |
| message(FATAL_ERROR "Policy is in NEW mode, but compiler version is ${CMAKE_${lang}_COMPILER_VERSION} instead of ${native_version}.") |
| endif() |
| if(NOT "${CMAKE_${lang}_SIMULATE_ID}" STREQUAL "GNU") |
| message(FATAL_ERROR "Policy is in NEW mode, but simulated compiler identification is ${CMAKE_${lang}_SIMULATE_ID} instead of GNU.") |
| endif() |
| if(NOT "${CMAKE_${lang}_SIMULATE_VERSION}" STREQUAL "${simulated_version}") |
| message(FATAL_ERROR "Policy is in NEW mode, but simulated compiler version is ${CMAKE_${lang}_SIMULATE_VERSION} instead of ${simulated_version}.") |
| endif() |
| else() |
| if(NOT "${CMAKE_${lang}_COMPILER_ID}" STREQUAL "GNU") |
| message(FATAL_ERROR "Policy is in OLD mode, but compiler identification is ${CMAKE_${lang}_COMPILER_ID} instead of GNU.") |
| endif() |
| if(NOT "${CMAKE_${lang}_COMPILER_VERSION}" STREQUAL "${simulated_version}") |
| message(FATAL_ERROR "Policy is in OLD mode, but compiler version is ${CMAKE_${lang}_COMPILER_VERSION} instead of ${simulated_version}.") |
| endif() |
| if(${CMAKE_${lang}_SIMULATE_VERSION} OR ${CMAKE_${lang}_SIMULATE_ID) |
| message(FATAL_ERROR "Policy is in OLD mode, but simulated compiler ID/version is ${CMAKE_${lang}_COMPILER_ID}/${CMAKE_${lang}_COMPILER_VERSION} instead of undefined.") |
| endif() |
| endif() |
| endif() |
| endfunction() |
