# Copyright (c) 2019 Hartmut Kaiser # # SPDX-License-Identifier: BSL-1.0 # Distributed under the Boost Software License, Version 1.0. (See accompanying # file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) # This file was adapted from: # https://github.com/axr/solar-cmake/blob/master/TargetArch.cmake # Based on the Qt 5 processor detection code, so should be very accurate # https://qt.gitorious.org/qt/qtbase/blobs/master/src/corelib/global/qprocessordetection.h # Currently handles arm (v5, v6, v7), x86 (32/64), ia64, ppc (32/64), s390x, and # BGQ # Regarding POWER/PowerPC, just as is noted in the Qt source, "There are many # more known variants/revisions that we do not handle/detect." set(archdetect_cpp_code " #if defined(__arm__) || defined(__TARGET_ARCH_ARM) || defined(__arm64__) || defined(__aarch64__) #if defined(__ARM_ARCH_7__) \\ || defined(__ARM_ARCH_7A__) \\ || defined(__ARM_ARCH_7R__) \\ || defined(__ARM_ARCH_7M__) \\ || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 7) #error cmake_ARCH armv7 #elif defined(__ARM_ARCH_6__) \\ || defined(__ARM_ARCH_6J__) \\ || defined(__ARM_ARCH_6T2__) \\ || defined(__ARM_ARCH_6Z__) \\ || defined(__ARM_ARCH_6K__) \\ || defined(__ARM_ARCH_6ZK__) \\ || defined(__ARM_ARCH_6M__) \\ || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 6) #error cmake_ARCH armv6 #elif defined(__ARM_ARCH_5TEJ__) \\ || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 5) #error cmake_ARCH armv5 #else #error cmake_ARCH arm #endif #elif defined(__riscv) && (__riscv_xlen == 64) #error cmake_ARCH riscv64 #elif defined(__i386) || defined(__i386__) || defined(_M_IX86) #error cmake_ARCH i386 #elif defined(__i486__) || defined(__i586__) || defined(__i686__) #error cmake_ARCH ix86 #elif defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(__amd64__) || defined(_M_X64) #error cmake_ARCH x86_64 #elif defined(__ia64) || defined(__ia64__) || defined(_M_IA64) #error cmake_ARCH ia64 #elif defined(__ppc__) || defined(__ppc) || defined(__powerpc__) \\ || defined(_ARCH_COM) || defined(_ARCH_PWR) || defined(_ARCH_PPC) \\ || defined(_M_MPPC) || defined(_M_PPC) #if defined(__ppc64__) || defined(__powerpc64__) || defined(__64BIT__) #error cmake_ARCH ppc64 #else #error cmake_ARCH ppc #endif #elif defined(__bgq__) #error cmake_ARCH bgq #elif defined(__s390x__) #error cmake_ARCH s390x #endif #error cmake_ARCH unknown " ) # Set ppc_support to TRUE before including this file or ppc and ppc64 will be # treated as invalid architectures since they are no longer supported by Apple function(target_architecture output_var) if(APPLE AND CMAKE_OSX_ARCHITECTURES) # On OS X we use CMAKE_OSX_ARCHITECTURES *if* it was set First let's # normalize the order of the values # Note that it's not possible to compile PowerPC applications if you are # using the OS X SDK version 10.6 or later - you'll need 10.4/10.5 for that, # so we disable it by default See this page for more information: # http://stackoverflow.com/questions/5333490/how-can-we-restore-ppc-ppc64-as-well-as-full-10-4-10-5-sdk-support-to-xcode-4 # Architecture defaults to i386 or ppc on OS X 10.5 and earlier, depending # on the CPU type detected at runtime. On OS X 10.6+ the default is x86_64 # if the CPU supports it, i386 otherwise. foreach(osx_arch ${CMAKE_OSX_ARCHITECTURES}) if("${osx_arch}" STREQUAL "ppc" AND ppc_support) set(osx_arch_ppc TRUE) elseif("${osx_arch}" STREQUAL "i386") set(osx_arch_i386 TRUE) elseif("${osx_arch}" STREQUAL "x86_64") set(osx_arch_x86_64 TRUE) elseif("${osx_arch}" STREQUAL "arm64") set(osx_arch_arm64 TRUE) elseif("${osx_arch}" STREQUAL "ppc64" AND ppc_support) set(osx_arch_ppc64 TRUE) else() message(FATAL_ERROR "Invalid OS X arch name: ${osx_arch}") endif() endforeach() # Now add all the architectures in our normalized order if(osx_arch_ppc) list(APPEND ARCH ppc) endif() if(osx_arch_i386) list(APPEND ARCH i386) endif() if(osx_arch_x86_64) list(APPEND ARCH x86_64) endif() if(osx_arch_arm64) list(APPEND ARCH arm64) endif() if(osx_arch_ppc64) list(APPEND ARCH ppc64) endif() else() if(NOT HPX_INTERNAL_ARCH_DETECT) if(NOT CMAKE_CROSSCOMPILING) file(WRITE "${PROJECT_BINARY_DIR}/arch.cpp" "${archdetect_cpp_code}") # Detect the architecture in a rather creative way... This compiles a # small C++ program which is a series of ifdefs that selects a # particular #error preprocessor directive whose message string contains # the target architecture. The program will always fail to compile (both # because file is not a valid C program, and obviously because of the # presence of the #error preprocessor directives... but by exploiting # the preprocessor in this way, we can detect the correct target # architecture even when cross-compiling, since the program itself never # needs to be run (only the compiler/preprocessor) try_run( run_result_unused compile_result_unused "${PROJECT_BINARY_DIR}" "${PROJECT_BINARY_DIR}/arch.cpp" COMPILE_OUTPUT_VARIABLE ARCH CMAKE_FLAGS CMAKE_OSX_ARCHITECTURES=${CMAKE_OSX_ARCHITECTURES} ) # Parse the architecture name from the compiler output string(REGEX MATCH "cmake_ARCH ([a-zA-Z0-9_]+)" ARCH "${ARCH}") # Get rid of the value marker leaving just the architecture name string(REPLACE "cmake_ARCH " "" ARCH "${ARCH}") endif() # If we are compiling with an unknown architecture this variable should # already be set to "unknown" but in the case that it's empty (i.e. due to # a typo in the code), then set it to unknown if(NOT ARCH) set(ARCH unknown) endif() set(HPX_INTERNAL_ARCH_DETECT ${ARCH} CACHE INTERNAL "" ) else() set(ARCH ${HPX_INTERNAL_ARCH_DETECT}) endif() endif() set(${output_var} "${ARCH}" PARENT_SCOPE ) endfunction()