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CMake/Help/variable/CMAKE_LANG_COMPILER_TARGET.rst

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Add compiler target compile options. For clang, this allows passing -target <triple> to the compiler, and for qcc, -V<arch> using toolchain files containing something like set(triple arm-linux-gnueabihf) set(CMAKE_C_COMPILER "/usr/bin/clang") set(CMAKE_C_COMPILER_TARGET ${triple}) set(CMAKE_CXX_COMPILER "/usr/bin/clang++") set(CMAKE_CXX_COMPILER_TARGET ${triple}) or set(arch gcc_ntoarmv7le) set(CMAKE_C_COMPILER /opt/qnx650/host/linux/x86/usr/bin/qcc) set(CMAKE_C_COMPILER_TARGET ${arch}) set(CMAKE_CXX_COMPILER /opt/qnx650/host/linux/x86/usr/bin/QCC) set(CMAKE_CXX_COMPILER_TARGET ${arch}) Both clang and qcc are inherently cross compiler( driver)s. When cross-compiling with clang, use the CMAKE_${lang}_COMPILER_TARGET as the _CMAKE_TOOLCHAIN_PREFIX to find the appropriate binutils. When cross-compiling with QNX qcc, use the CMAKE_${lang}_COMPILER_TARGET to set the appropriate _CMAKE_TOOLCHAIN_PREFIX.
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CMAKE_<LANG>_COMPILER_TARGET
----------------------------
The target for cross-compiling, if supported.
Some compiler drivers are inherently cross-compilers, such as clang and
QNX qcc. These compiler drivers support a command-line argument to specify
the target to cross-compile for.
This variable may only be set in a toolchain file specified by
Help: Document the CMAKE_TOOLCHAIN_FILE. Link to the new docs from existing references to the variable.
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the :variable:`CMAKE_TOOLCHAIN_FILE` variable.