Toolchain Features ¶ĬMake provides the try_compile() command and wrapper macros such asĬheckCXXSourceCompiles, CheckCXXSymbolExists andĬheckIncludeFile to test capability and availability of various With the LINKER_LANGUAGE target property. Target, and in the case of static libraries, This is determined by the LANGUAGE property of source files of the Will be added to the compile command when compiling a file of a particularĬMake needs a way to determine which compiler to use to invoke the linker. The variables and the configuration-specific equivalents contain flags that The compiler identifier used by CMake CMAKE_COMPILER_VERSION The full path to the compiler used for CMAKE_COMPILER_ID Several variables relate to the language components of a toolchain which are The ENABLED_LANGUAGES global property contains the languages whichĪre currently enabled. The target architecture and bitwidth, the location of corresponding utilities When a language is enabled, CMake finds a compiler for that language, andĭetermines some information, such as the vendor and version of the compiler, With information about compiler and utility paths. In cross-compiling scenarios, a toolchain file may be specified In normal builds, CMake automaticallyĭetermines the toolchain for host builds based on system introspection andĭefaults. The toolchain utilities availableĪre determined by the languages enabled. Set(CMAKE_CXX_FLAGS_INIT "-coverage -fno-exceptions -g")Įnhanced safety checks.Cross Compiling for the Cray Linux EnvironmentĬross Compiling for Windows 10 Universal ApplicationsĬross Compiling for Android with a Standalone ToolchainĬross Compiling for Android with NVIDIA Nsight Tegra Visual Studio EditionĬross Compiling for iOS, tvOS, or watchOSĬMake uses a toolchain of utilities to compile, link libraries and createĪrchives, and other tasks to drive the build. set(CMAKE_CXX_FLAGS_INIT "-Werror -Wall -Wextra -Wpedantic") Hardened diagnostics for your unit tests. Toolchain files make cross-compilation easier, but they have other uses: When you want to generate a build system with this toolchain, specify the CMAKE_TOOLCHAIN_FILE parameter on the command line: mkdir android-arm-build & cd android-arm-buildĬmake -DCMAKE_TOOLCHAIN_FILE=$(pwd)/./arm-linux-androideadi-gcc.cmake. (You can find an example Linux cross-compiling toolchain file here.) arm-linux-androideadi-gcc.cmake with global toolchain settings: set(CMAKE_CXX_COMPILER arm-linux-gnueabihf-g++) GCC on GNU/Linux or MSVC on Windows) without any additional flags.Ĭreate a file, e.g. And your program should build for the native platform with the default toolchain (e.g. Ideally, there should be no compiler/linker flags in your CMakeLists.txt files - even within if/ endif blocks. details of how certain toolchains should be configured - separated into CMake script files, extensible by future users of your project, scalable.instructions on how to organise source files into targets - expressed in CMakeLists.txt files, entirely toolchain-agnostic and.This ensures that there is a clean division between: The preferred way to specify toolchain-specific options is using CMake's toolchain facility. The easiest one (not clean, but easy and convenient, and works only for compile flags, C & C++ at once): add_definitions($ ) Suppose you want to add those flags (better to declare them in a constant): SET(GCC_COVERAGE_COMPILE_FLAGS "-fprofile-arcs -ftest-coverage") Note: Given CMake evolution since this was answer was written in 2012, most of the suggestions here are now outdated/deprecated and have better alternatives.
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