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22 lines
913 B
CMake
22 lines
913 B
CMake
###############################################################################
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# Target detection
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#
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# We abuse the compiler preprocessor to work out what target the compiler is
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# building for. The nice thing about this approach is that we'll detect the
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# right target even if we are using a cross compiler.
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###############################################################################
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function(detect_target_architecture OUTPUT_VAR)
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try_run(run_result
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compile_result
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"${PROJECT_BINARY_DIR}"
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"${PROJECT_SOURCE_DIR}/cmake/target_arch_detect.cpp"
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COMPILE_OUTPUT_VARIABLE compiler_output
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)
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if (compile_result)
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message(FATAL_ERROR "Expected compile to fail")
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endif()
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string(REGEX MATCH "CMAKE_TARGET_ARCH_([a-zA-Z0-9_]+)" arch "${compiler_output}")
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# Strip out prefix
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string(REPLACE "CMAKE_TARGET_ARCH_" "" arch "${arch}")
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set(${OUTPUT_VAR} "${arch}" PARENT_SCOPE)
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endfunction()
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