diff options
Diffstat (limited to 'Modules/CMakeDetermineOBJCCompiler.cmake')
| -rw-r--r-- | Modules/CMakeDetermineOBJCCompiler.cmake | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/Modules/CMakeDetermineOBJCCompiler.cmake b/Modules/CMakeDetermineOBJCCompiler.cmake new file mode 100644 index 0000000..ad13eab --- /dev/null +++ b/Modules/CMakeDetermineOBJCCompiler.cmake @@ -0,0 +1,189 @@ +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + + +# determine the compiler to use for Objective-C programs +# NOTE, a generator may set CMAKE_OBJC_COMPILER before +# loading this file to force a compiler. +# use environment variable OBJC first if defined by user, next use +# the cmake variable CMAKE_GENERATOR_OBJC which can be defined by a generator +# as a default compiler +# +# Sets the following variables: +# CMAKE_OBJC_COMPILER +# CMAKE_AR +# CMAKE_RANLIB +# CMAKE_COMPILER_IS_GNUOBJC +# CMAKE_COMPILER_IS_CLANGOBJC +# +# If not already set before, it also sets +# _CMAKE_TOOLCHAIN_PREFIX + +include(${CMAKE_ROOT}/Modules/CMakeDetermineCompiler.cmake) + +# Load system-specific compiler preferences for this language. +include(Platform/${CMAKE_SYSTEM_NAME}-Determine-OBJC OPTIONAL) +include(Platform/${CMAKE_SYSTEM_NAME}-OBJC OPTIONAL) +if(NOT CMAKE_OBJC_COMPILER_NAMES) + set(CMAKE_OBJC_COMPILER_NAMES clang) +endif() + +if("${CMAKE_GENERATOR}" MATCHES "Xcode") + set(CMAKE_OBJC_COMPILER_XCODE_TYPE sourcecode.c.objc) +else() + if(NOT CMAKE_OBJC_COMPILER) + set(CMAKE_OBJC_COMPILER_INIT NOTFOUND) + + # prefer the environment variable OBJC + if($ENV{OBJC} MATCHES ".+") + get_filename_component(CMAKE_OBJC_COMPILER_INIT $ENV{OBJC} PROGRAM PROGRAM_ARGS CMAKE_OBJC_FLAGS_ENV_INIT) + if(CMAKE_OBJC_FLAGS_ENV_INIT) + set(CMAKE_OBJC_COMPILER_ARG1 "${CMAKE_OBJC_FLAGS_ENV_INIT}" CACHE STRING "First argument to Objective-C compiler") + endif() + if(NOT EXISTS ${CMAKE_OBJC_COMPILER_INIT}) + message(FATAL_ERROR "Could not find compiler set in environment variable OBJC:\n$ENV{OBJC}.") + endif() + endif() + + # next try prefer the compiler specified by the generator + if(CMAKE_GENERATOR_OBJC) + if(NOT CMAKE_OBJC_COMPILER_INIT) + set(CMAKE_OBJC_COMPILER_INIT ${CMAKE_GENERATOR_OBJC}) + endif() + endif() + + # finally list compilers to try + if(NOT CMAKE_OBJC_COMPILER_INIT) + set(CMAKE_OBJC_COMPILER_LIST ${_CMAKE_TOOLCHAIN_PREFIX}cc ${_CMAKE_TOOLCHAIN_PREFIX}gcc clang) + endif() + + _cmake_find_compiler(OBJC) + + else() + # we only get here if CMAKE_OBJC_COMPILER was specified using -D or a pre-made CMakeCache.txt + # (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE + # if CMAKE_OBJC_COMPILER is a list of length 2, use the first item as + # CMAKE_OBJC_COMPILER and the 2nd one as CMAKE_OBJC_COMPILER_ARG1 + + list(LENGTH CMAKE_OBJC_COMPILER _CMAKE_OBJC_COMPILER_LIST_LENGTH) + if("${_CMAKE_OBJC_COMPILER_LIST_LENGTH}" EQUAL 2) + list(GET CMAKE_OBJC_COMPILER 1 CMAKE_OBJC_COMPILER_ARG1) + list(GET CMAKE_OBJC_COMPILER 0 CMAKE_OBJC_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_OBJC_COMPILER_PATH "${CMAKE_OBJC_COMPILER}" PATH) + if(NOT _CMAKE_USER_OBJC_COMPILER_PATH) + find_program(CMAKE_OBJC_COMPILER_WITH_PATH NAMES ${CMAKE_OBJC_COMPILER}) + if(CMAKE_OBJC_COMPILER_WITH_PATH) + set(CMAKE_OBJC_COMPILER ${CMAKE_OBJC_COMPILER_WITH_PATH} CACHE STRING "Objective-C compiler" FORCE) + endif() + unset(CMAKE_OBJC_COMPILER_WITH_PATH CACHE) + endif() + endif() + mark_as_advanced(CMAKE_OBJC_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 + # a valid identification file. + set(CMAKE_OBJC_COMPILER_ID_TEST_FLAGS_FIRST) + set(CMAKE_OBJC_COMPILER_ID_TEST_FLAGS + # Try compiling to an object file only. + "-c" + + ) +endif() + +# Build a small source file to identify the compiler. +if(NOT CMAKE_OBJC_COMPILER_ID_RUN) + set(CMAKE_OBJC_COMPILER_ID_RUN 1) + + # Try to identify the compiler. + set(CMAKE_OBJC_COMPILER_ID) + file(READ ${CMAKE_ROOT}/Modules/CMakePlatformId.h.in + CMAKE_OBJC_COMPILER_ID_PLATFORM_CONTENT) + + # Match the link line from xcodebuild output of the form + # Ld ... + # ... + # /path/to/cc ...CompilerIdOBJC/... + # to extract the compiler front-end for the language. + set(CMAKE_OBJC_COMPILER_ID_TOOL_MATCH_REGEX "\nLd[^\n]*(\n[ \t]+[^\n]*)*\n[ \t]+([^ \t\r\n]+)[^\r\n]*-o[^\r\n]*CompilerIdOBJC/(\\./)?(CompilerIdOBJC.(framework|xctest)/)?CompilerIdOBJC[ \t\n\\\"]") + set(CMAKE_OBJC_COMPILER_ID_TOOL_MATCH_INDEX 2) + + include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake) + CMAKE_DETERMINE_COMPILER_ID(OBJC OBJCCFLAGS CMakeOBJCCompilerId.m) + + # Set old compiler and platform id variables. + if(CMAKE_OBJC_COMPILER_ID STREQUAL "GNU") + set(CMAKE_COMPILER_IS_GNUOBJC 1) + endif() + if(CMAKE_OBJC_COMPILER_ID STREQUAL "Clang") + set(CMAKE_COMPILER_IS_CLANGOBJC 1) + endif() +endif() + +if (NOT _CMAKE_TOOLCHAIN_LOCATION) + get_filename_component(_CMAKE_TOOLCHAIN_LOCATION "${CMAKE_OBJC_COMPILER}" PATH) +endif () + +# If we have a gcc cross compiler, they have usually some prefix, like +# e.g. powerpc-linux-gcc, arm-elf-gcc or i586-mingw32msvc-gcc, optionally +# with a 3-component version number at the end (e.g. arm-eabi-gcc-4.5.2). +# The other tools of the toolchain usually have the same prefix +# NAME_WE cannot be used since then this test will fail for names like +# "arm-unknown-nto-qnx6.3.0-gcc.exe", where BASENAME would be +# "arm-unknown-nto-qnx6" instead of the correct "arm-unknown-nto-qnx6.3.0-" +if (CMAKE_CROSSCOMPILING AND NOT _CMAKE_TOOLCHAIN_PREFIX) + + if(CMAKE_OBJC_COMPILER_ID MATCHES "GNU|Clang|QCC") + get_filename_component(COMPILER_BASENAME "${CMAKE_OBJC_COMPILER}" NAME) + if (COMPILER_BASENAME MATCHES "^(.+-)(clang|g?cc)(-[0-9]+(\\.[0-9]+)*)?(-[^.]+)?(\\.exe)?$") + set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1}) + set(_CMAKE_COMPILER_SUFFIX ${CMAKE_MATCH_5}) + elseif(CMAKE_OBJC_COMPILER_ID MATCHES "Clang") + if(CMAKE_OBJC_COMPILER_TARGET) + set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_OBJC_COMPILER_TARGET}-) + endif() + elseif(COMPILER_BASENAME MATCHES "qcc(\\.exe)?$") + if(CMAKE_OBJC_COMPILER_TARGET MATCHES "gcc_nto([a-z0-9]+_[0-9]+|[^_le]+)(le)?") + set(_CMAKE_TOOLCHAIN_PREFIX nto${CMAKE_MATCH_1}-) + endif() + endif () + + # if "llvm-" is part of the prefix, remove it, since llvm doesn't have its own binutils + # but uses the regular ar, objcopy, etc. (instead of llvm-objcopy etc.) + if ("${_CMAKE_TOOLCHAIN_PREFIX}" MATCHES "(.+-)?llvm-$") + set(_CMAKE_TOOLCHAIN_PREFIX ${CMAKE_MATCH_1}) + endif () + endif() + +endif () + +set(_CMAKE_PROCESSING_LANGUAGE "OBJC") +include(CMakeFindBinUtils) +include(Compiler/${CMAKE_OBJC_COMPILER_ID}-FindBinUtils OPTIONAL) +unset(_CMAKE_PROCESSING_LANGUAGE) + +if(CMAKE_OBJC_COMPILER_ARCHITECTURE_ID) + set(_SET_CMAKE_OBJC_COMPILER_ARCHITECTURE_ID + "set(CMAKE_OBJC_COMPILER_ARCHITECTURE_ID ${CMAKE_OBJC_COMPILER_ARCHITECTURE_ID})") +else() + set(_SET_CMAKE_OBJC_COMPILER_ARCHITECTURE_ID "") +endif() + +if(CMAKE_OBJC_XCODE_ARCHS) + set(SET_CMAKE_XCODE_ARCHS + "set(CMAKE_XCODE_ARCHS \"${CMAKE_OBJC_XCODE_ARCHS}\")") +endif() + +# configure variables set in this file for fast reload later on +configure_file(${CMAKE_ROOT}/Modules/CMakeOBJCCompiler.cmake.in + ${CMAKE_PLATFORM_INFO_DIR}/CMakeOBJCCompiler.cmake + @ONLY + ) +set(CMAKE_OBJC_COMPILER_ENV_VAR "OBJC") |