diff options
Diffstat (limited to 'Modules/CMakeDetermineCCompiler.cmake')
| -rw-r--r-- | Modules/CMakeDetermineCCompiler.cmake | 117 |
1 files changed, 59 insertions, 58 deletions
diff --git a/Modules/CMakeDetermineCCompiler.cmake b/Modules/CMakeDetermineCCompiler.cmake index 171eadd..3ce1a36 100644 --- a/Modules/CMakeDetermineCCompiler.cmake +++ b/Modules/CMakeDetermineCCompiler.cmake @@ -39,76 +39,68 @@ if(NOT CMAKE_C_COMPILER_NAMES) set(CMAKE_C_COMPILER_NAMES cc) endif() -if(NOT CMAKE_C_COMPILER) - set(CMAKE_C_COMPILER_INIT NOTFOUND) - - # prefer the environment variable CC - if($ENV{CC} MATCHES ".+") - get_filename_component(CMAKE_C_COMPILER_INIT $ENV{CC} PROGRAM PROGRAM_ARGS CMAKE_C_FLAGS_ENV_INIT) - if(CMAKE_C_FLAGS_ENV_INIT) - set(CMAKE_C_COMPILER_ARG1 "${CMAKE_C_FLAGS_ENV_INIT}" CACHE STRING "First argument to C compiler") +if(${CMAKE_GENERATOR} MATCHES "Visual Studio") + set(CMAKE_C_COMPILER_ID_RUN 1) + set(CMAKE_C_PLATFORM_ID "Windows") + set(CMAKE_C_COMPILER_ID "MSVC") + set(CMAKE_C_COMPILER "${CMAKE_GENERATOR_CC}") +else() + if(NOT CMAKE_C_COMPILER) + set(CMAKE_C_COMPILER_INIT NOTFOUND) + + # prefer the environment variable CC + if($ENV{CC} MATCHES ".+") + get_filename_component(CMAKE_C_COMPILER_INIT $ENV{CC} PROGRAM PROGRAM_ARGS CMAKE_C_FLAGS_ENV_INIT) + if(CMAKE_C_FLAGS_ENV_INIT) + set(CMAKE_C_COMPILER_ARG1 "${CMAKE_C_FLAGS_ENV_INIT}" CACHE STRING "First argument to C compiler") + endif() + if(NOT EXISTS ${CMAKE_C_COMPILER_INIT}) + message(FATAL_ERROR "Could not find compiler set in environment variable CC:\n$ENV{CC}.") + endif() endif() - if(NOT EXISTS ${CMAKE_C_COMPILER_INIT}) - message(FATAL_ERROR "Could not find compiler set in environment variable CC:\n$ENV{CC}.") + + # next try prefer the compiler specified by the generator + if(CMAKE_GENERATOR_CC) + if(NOT CMAKE_C_COMPILER_INIT) + set(CMAKE_C_COMPILER_INIT ${CMAKE_GENERATOR_CC}) + endif() endif() - endif() - # next try prefer the compiler specified by the generator - if(CMAKE_GENERATOR_CC) + # finally list compilers to try if(NOT CMAKE_C_COMPILER_INIT) - set(CMAKE_C_COMPILER_INIT ${CMAKE_GENERATOR_CC}) + set(CMAKE_C_COMPILER_LIST ${_CMAKE_TOOLCHAIN_PREFIX}cc ${_CMAKE_TOOLCHAIN_PREFIX}gcc cl bcc xlc clang) endif() - endif() - # finally list compilers to try - if(NOT CMAKE_C_COMPILER_INIT) - set(CMAKE_C_COMPILER_LIST ${_CMAKE_TOOLCHAIN_PREFIX}cc ${_CMAKE_TOOLCHAIN_PREFIX}gcc cl bcc xlc clang) - endif() + _cmake_find_compiler(C) - _cmake_find_compiler(C) + else() -else() + # we only get here if CMAKE_C_COMPILER was specified using -D or a pre-made CMakeCache.txt + # (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE + # if CMAKE_C_COMPILER is a list of length 2, use the first item as + # CMAKE_C_COMPILER and the 2nd one as CMAKE_C_COMPILER_ARG1 - # we only get here if CMAKE_C_COMPILER was specified using -D or a pre-made CMakeCache.txt - # (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE - # if CMAKE_C_COMPILER is a list of length 2, use the first item as - # CMAKE_C_COMPILER and the 2nd one as CMAKE_C_COMPILER_ARG1 - - list(LENGTH CMAKE_C_COMPILER _CMAKE_C_COMPILER_LIST_LENGTH) - if("${_CMAKE_C_COMPILER_LIST_LENGTH}" EQUAL 2) - list(GET CMAKE_C_COMPILER 1 CMAKE_C_COMPILER_ARG1) - list(GET CMAKE_C_COMPILER 0 CMAKE_C_COMPILER) - endif() + list(LENGTH CMAKE_C_COMPILER _CMAKE_C_COMPILER_LIST_LENGTH) + if("${_CMAKE_C_COMPILER_LIST_LENGTH}" EQUAL 2) + list(GET CMAKE_C_COMPILER 1 CMAKE_C_COMPILER_ARG1) + list(GET CMAKE_C_COMPILER 0 CMAKE_C_COMPILER) + endif() - # if a compiler was specified by the user but without path, - # now try to find it with the full path - # if it is found, force it into the cache, - # if not, don't overwrite the setting (which was given by the user) with "NOTFOUND" - # if the C compiler already had a path, reuse it for searching the CXX compiler - get_filename_component(_CMAKE_USER_C_COMPILER_PATH "${CMAKE_C_COMPILER}" PATH) - if(NOT _CMAKE_USER_C_COMPILER_PATH) - find_program(CMAKE_C_COMPILER_WITH_PATH NAMES ${CMAKE_C_COMPILER}) - mark_as_advanced(CMAKE_C_COMPILER_WITH_PATH) - if(CMAKE_C_COMPILER_WITH_PATH) - set(CMAKE_C_COMPILER ${CMAKE_C_COMPILER_WITH_PATH} CACHE STRING "C compiler" FORCE) + # if a compiler was specified by the user but without path, + # now try to find it with the full path + # if it is found, force it into the cache, + # if not, don't overwrite the setting (which was given by the user) with "NOTFOUND" + # if the C compiler already had a path, reuse it for searching the CXX compiler + get_filename_component(_CMAKE_USER_C_COMPILER_PATH "${CMAKE_C_COMPILER}" PATH) + if(NOT _CMAKE_USER_C_COMPILER_PATH) + find_program(CMAKE_C_COMPILER_WITH_PATH NAMES ${CMAKE_C_COMPILER}) + mark_as_advanced(CMAKE_C_COMPILER_WITH_PATH) + if(CMAKE_C_COMPILER_WITH_PATH) + set(CMAKE_C_COMPILER ${CMAKE_C_COMPILER_WITH_PATH} CACHE STRING "C compiler" FORCE) + endif() endif() endif() -endif() -mark_as_advanced(CMAKE_C_COMPILER) - -if (NOT _CMAKE_TOOLCHAIN_LOCATION) - get_filename_component(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_C_COMPILER}" PATH) -endif () - -# Build a small source file to identify the compiler. -if(${CMAKE_GENERATOR} MATCHES "Visual Studio") - set(CMAKE_C_COMPILER_ID_RUN 1) - set(CMAKE_C_PLATFORM_ID "Windows") - set(CMAKE_C_COMPILER_ID "MSVC") -endif() - -if(NOT CMAKE_C_COMPILER_ID_RUN) - set(CMAKE_C_COMPILER_ID_RUN 1) + mark_as_advanced(CMAKE_C_COMPILER) # Each entry in this list is a set of extra flags to try # adding to the compile line to see if it helps produce @@ -120,6 +112,11 @@ if(NOT CMAKE_C_COMPILER_ID_RUN) # Try enabling ANSI mode on HP. "-Aa" ) +endif() + +# Build a small source file to identify the compiler. +if(NOT CMAKE_C_COMPILER_ID_RUN) + set(CMAKE_C_COMPILER_ID_RUN 1) # Try to identify the compiler. set(CMAKE_C_COMPILER_ID) @@ -139,6 +136,10 @@ if(NOT CMAKE_C_COMPILER_ID_RUN) endif() endif() +if (NOT _CMAKE_TOOLCHAIN_LOCATION) + get_filename_component(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_C_COMPILER}" PATH) +endif () + # If we have a gcc cross compiler, they have usually some prefix, like # e.g. powerpc-linux-gcc, arm-elf-gcc or i586-mingw32msvc-gcc, optionally # with a 3-component version number at the end (e.g. arm-eabi-gcc-4.5.2). |