forked from OSchip/llvm-project
68 lines
3.3 KiB
CMake
68 lines
3.3 KiB
CMake
#
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#//===----------------------------------------------------------------------===//
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#//
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#// The LLVM Compiler Infrastructure
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#//
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#// This file is dual licensed under the MIT and the University of Illinois Open
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#// Source Licenses. See LICENSE.txt for details.
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#//
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#//===----------------------------------------------------------------------===//
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#
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# Determine the architecture from predefined compiler macros
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# The architecture name can only contain alphanumeric characters and underscores (i.e., C identifier)
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# void get_architecture(string* return_arch)
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# - Returns the architecture in return_arch
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function(get_architecture return_arch)
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set(detect_arch_src_txt "
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#if defined(__KNC__)
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#error ARCHITECTURE=mic
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#elif defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(_M_X64) || defined(_M_AMD64)
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#error ARCHITECTURE=32e
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#elif defined(__i386) || defined(__i386__) || defined(__IA32__) || defined(_M_I86) || defined(_M_IX86) || defined(__X86__) || defined(_X86_)
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#error ARCHITECTURE=32
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#elif defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__)
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#error ARCHITECTURE=arm
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#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6T2__) || defined(__ARM_ARCH_6ZK__)
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#error ARCHITECTURE=arm
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#elif defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5TEJ__)
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#error ARCHITECTURE=arm
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#elif defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__)
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#error ARCHITECTURE=arm
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#elif defined(__ARM_ARCH_3__) || defined(__ARM_ARCH_3M__)
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#error ARCHITECTURE=arm
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#elif defined(__ARM_ARCH_2__)
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#error ARCHITECTURE=arm
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#elif defined(__arm__) || defined(_M_ARM) || defined(_ARM)
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#error ARCHITECTURE=arm
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#elif defined(__aarch64__)
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#error ARCHITECTURE=aarch64
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#elif defined(__powerpc64__) && defined(__LITTLE_ENDIAN__)
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#error ARCHITECTURE=ppc64le
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#elif defined(__powerpc64__)
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#error ARCHITECTURE=ppc64
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#else
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#error ARCHITECTURE=UnknownArchitecture
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#endif
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"
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)
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# Write out ${detect_arch_src_txt} to a file within the cmake/ subdirectory
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file(WRITE "${LIBOMP_WORK}/cmake/detect_arch.c" ${detect_arch_src_txt})
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# Try to compile using the C Compiler. It will always error out with an #error directive, so store error output to ${local_architecture}
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try_run(run_dummy compile_dummy "${CMAKE_CURRENT_BINARY_DIR}" "${LIBOMP_WORK}/cmake/detect_arch.c" COMPILE_OUTPUT_VARIABLE local_architecture)
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# Match the important architecture line and store only that matching string in ${local_architecture}
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string(REGEX MATCH "ARCHITECTURE=([a-zA-Z0-9_]+)" local_architecture "${local_architecture}")
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# Get rid of the ARCHITECTURE= part of the string
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string(REPLACE "ARCHITECTURE=" "" local_architecture "${local_architecture}")
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# set the return value to the architecture detected (e.g., 32e, 32, arm, ppc64, etc.)
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set(${return_arch} "${local_architecture}" PARENT_SCOPE)
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# Remove ${detect_arch_src_txt} from cmake/ subdirectory
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file(REMOVE "${LIBOMP_WORK}/cmake/detect_arch.c")
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endfunction()
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