CMake/Modules/CMakeTestCCompiler.cmake
Fred Baksik 72e0c115b7 GHS: Add Compiler ID detection
-- Detect GHS compiler and version
   Detect ARCHITECTURE_ID for PPC / ARM / 86 targets
   Detect PLATFORM_ID for Integrity and Integrity178 platforms
   Using defines specified in the documents for the compilers: 201416 PPC / 201754 ARM / 201714 86
-- Fallback C/CXX compiler ID to GHS if not otherwise detected and using GHS MULTI generator
   Works around issue with some GHS compilers not setting __ghs__ compiler define
-- Tweak Compiler ID checking so major id of 002017 is not replaced with 217
-- Prefer try_compile() library targets when testing for working GHS compilers
-- Avoid CMake errors if reading past end of file for checking if file is PE executable
2019-01-16 10:42:04 -05:00

90 lines
3.3 KiB
CMake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
if(CMAKE_C_COMPILER_FORCED)
# The compiler configuration was forced by the user.
# Assume the user has configured all compiler information.
set(CMAKE_C_COMPILER_WORKS TRUE)
return()
endif()
include(CMakeTestCompilerCommon)
# Remove any cached result from an older CMake version.
# We now store this in CMakeCCompiler.cmake.
unset(CMAKE_C_COMPILER_WORKS CACHE)
# This file is used by EnableLanguage in cmGlobalGenerator to
# determine that that selected C compiler can actually compile
# and link the most basic of programs. If not, a fatal error
# is set and cmake stops processing commands and will not generate
# any makefiles or projects.
if(NOT CMAKE_C_COMPILER_WORKS)
PrintTestCompilerStatus("C" "")
__TestCompiler_setTryCompileTargetType()
file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCCompiler.c
"#ifdef __cplusplus\n"
"# error \"The CMAKE_C_COMPILER is set to a C++ compiler\"\n"
"#endif\n"
"#if defined(__CLASSIC_C__)\n"
"int main(argc, argv)\n"
" int argc;\n"
" char* argv[];\n"
"#else\n"
"int main(int argc, char* argv[])\n"
"#endif\n"
"{ (void)argv; return argc-1;}\n")
try_compile(CMAKE_C_COMPILER_WORKS ${CMAKE_BINARY_DIR}
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCCompiler.c
OUTPUT_VARIABLE __CMAKE_C_COMPILER_OUTPUT)
# Move result from cache to normal variable.
set(CMAKE_C_COMPILER_WORKS ${CMAKE_C_COMPILER_WORKS})
unset(CMAKE_C_COMPILER_WORKS CACHE)
set(C_TEST_WAS_RUN 1)
__TestCompiler_restoreTryCompileTargetType()
endif()
if(NOT CMAKE_C_COMPILER_WORKS)
PrintTestCompilerStatus("C" " -- broken")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Determining if the C compiler works failed with "
"the following output:\n${__CMAKE_C_COMPILER_OUTPUT}\n\n")
string(REPLACE "\n" "\n " _output "${__CMAKE_C_COMPILER_OUTPUT}")
message(FATAL_ERROR "The C compiler\n \"${CMAKE_C_COMPILER}\"\n"
"is not able to compile a simple test program.\nIt fails "
"with the following output:\n ${_output}\n\n"
"CMake will not be able to correctly generate this project.")
else()
if(C_TEST_WAS_RUN)
PrintTestCompilerStatus("C" " -- works")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Determining if the C compiler works passed with "
"the following output:\n${__CMAKE_C_COMPILER_OUTPUT}\n\n")
endif()
# Try to identify the ABI and configure it into CMakeCCompiler.cmake
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
CMAKE_DETERMINE_COMPILER_ABI(C ${CMAKE_ROOT}/Modules/CMakeCCompilerABI.c)
# Try to identify the compiler features
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompileFeatures.cmake)
CMAKE_DETERMINE_COMPILE_FEATURES(C)
# Re-configure to save learned information.
configure_file(
${CMAKE_ROOT}/Modules/CMakeCCompiler.cmake.in
${CMAKE_PLATFORM_INFO_DIR}/CMakeCCompiler.cmake
@ONLY
)
include(${CMAKE_PLATFORM_INFO_DIR}/CMakeCCompiler.cmake)
if(CMAKE_C_SIZEOF_DATA_PTR)
foreach(f ${CMAKE_C_ABI_FILES})
include(${f})
endforeach()
unset(CMAKE_C_ABI_FILES)
endif()
endif()
unset(__CMAKE_C_COMPILER_OUTPUT)