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# Copyright (c) 2017-2022, The PurpleI2P Project
# This file is part of Purple i2pd project and licensed under BSD3
# See full license text in LICENSE file at top of project tree
# Based on the Qt 5 processor detection code, so should be very accurate
# https://github.com/qt/qtbase/blob/dev/src/corelib/global/qprocessordetection.h
# Currently handles arm (v5, v6, v7, v8), x86 (32/64), ia64, mips (32/64, mipsel, mips64el) and ppc (32/64)
# 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_c_code "
#if defined(__arm__) || defined(__TARGET_ARCH_ARM)|| defined(_M_ARM) || defined(_M_ARM64) || defined(__aarch64__) || defined(__ARM64__)
#if defined(__ARM64_ARCH_8__) \\
|| defined(__aarch64__) \\
|| defined(__ARMv8__) \\
|| defined(__ARMv8_A__) \\
|| defined(_M_ARM64) \\
|| (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 8)
#error cmake_ARCH arm64
#if defined(__ARM_ARCH_7__) \\
|| defined(__ARM_ARCH_7A__) \\
|| defined(__ARM_ARCH_7R__) \\
|| defined(__ARM_ARCH_7M__) \\
|| defined(__ARM_ARCH_7S__) \\
|| defined(_ARM_ARCH_7) \\
|| defined(__CORE_CORTEXA__) \\
|| (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(__ARM_ARCH_5TE__) \\
|| (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 5)
#error cmake_ARCH armv5
#else
#error cmake_ARCH arm
#endif
#elif defined(__i386) || defined(__i386__) || defined(_M_IX86)
#error cmake_ARCH i386
#elif defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(_M_X64)
#error cmake_ARCH x86_64
#elif defined(__ia64) || defined(__ia64__) || defined(_M_IA64)
#error cmake_ARCH ia64
#elif defined(__mips) || defined(__mips__) || defined(_M_MRX000)
#if defined(_MIPS_ARCH_MIPS64) || defined(__mips64)
#if defined(__MIPSEL__)
#error cmake_ARCH mips64el
#else
#error cmake_ARCH mips64
#endif
#elif defined(__MIPSEL__)
#error cmake_ARCH mipsel
#else
#error cmake_ARCH mips
#endif
#elif defined(__ppc__) || defined(__ppc) || defined(__powerpc__) || 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
#endif
#error cmake_ARCH unknown
")
# Set ppc_support to TRUE before including this file on 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("${osx_arch}" STREQUAL "ppc64" AND ppc_support)
set(osx_arch_ppc64 TRUE)
elseif("${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)
else()
message(FATAL_ERROR "Invalid OS X arch name: ${osx_arch}")
endif()
endforeach()
# Now add all the architectures in our normalized order
if(osx_arch_ppc)
list(APPEND ARCH ppc)
endif()
if(osx_arch_ppc64)
list(APPEND ARCH ppc64)
endif()
if(osx_arch_i386)
list(APPEND ARCH i386)
endif()
if(osx_arch_x86_64)
list(APPEND ARCH x86_64)
endif()
if(osx_arch_arm64)
list(APPEND ARCH arm64)
endif()
else()
file(WRITE "${CMAKE_BINARY_DIR}/arch.c" "${archdetect_c_code}")
enable_language(C)
# Detect the architecture in a rather creative way...
# This compiles a small C program which is a series of ifdefs that selects a
# particular #error preprocessor directive whose message string contains the
# target architecture. The program will always fail to compile (both because
# file is not a valid C program, and obviously because of the presence of the
# #error preprocessor directives... but by exploiting the preprocessor in this
# way, we can detect the correct target architecture even when cross-compiling,
# since the program itself never needs to be run (only the compiler/preprocessor)
try_run(
run_result_unused
compile_result_unused
"${CMAKE_BINARY_DIR}"
"${CMAKE_BINARY_DIR}/arch.c"
COMPILE_OUTPUT_VARIABLE ARCH
CMAKE_FLAGS CMAKE_OSX_ARCHITECTURES=${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}")
# 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()
endif()
set(${output_var} "${ARCH}" PARENT_SCOPE)
endfunction()