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57b08b0944
to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351648
70 lines
3.5 KiB
CMake
70 lines
3.5 KiB
CMake
#
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#//===----------------------------------------------------------------------===//
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#//
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#// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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#// See https://llvm.org/LICENSE.txt for license information.
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#// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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(libomp_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=x86_64
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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=i386
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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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#elif defined(__mips__) && defined(__mips64)
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#error ARCHITECTURE=mips64
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#elif defined(__mips__) && !defined(__mips64)
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#error ARCHITECTURE=mips
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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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# Write out ${detect_arch_src_txt} to a file within the cmake/ subdirectory
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file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/libomp_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}" "${CMAKE_CURRENT_BINARY_DIR}/libomp_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 ${detect_arch_src_txt} from cmake/ subdirectory
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file(REMOVE "${CMAKE_CURRENT_BINARY_DIR}/libomp_detect_arch.c")
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endfunction()
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