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# This file is taken from https://github.com/abdes/cryptopp-cmake/blob/6bb64630c563937e4263b721755c724c0e1ba6e1/cmake/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, 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
"
/*
ARM family, known revisions: V5, V6, V7, V8
*/
#if defined(__arm__) || defined(__TARGET_ARCH_ARM) || defined(_M_ARM) || defined(_M_ARM64) || defined(__aarch64__) || defined(__ARM64__)
# if defined(__aarch64__) || defined(__ARM64__) || defined(_M_ARM64)
# error cmake_ARCH arm64
# else
# error cmake_ARCH arm
# endif
#elif defined(__CYGWIN__)
#error cmake_ARCH cygwin
#elif defined(__MINGW64__)
#error cmake_ARCH mingw64
#elif defined(__MINGW32__)
#error cmake_ARCH mingw32
#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(__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
#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(cryfs_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("${osx_arch}" STREQUAL "ppc64" AND ppc_support)
set(osx_arch_ppc64 TRUE)
elseif("${osx_arch}" STREQUAL "arm64")
set(osx_arch_arm64 TRUE)
elseif("${osx_arch}" STREQUAL "$(ARCHS_STANDARD)")
set(osx_arch_arm64 TRUE)
set(osx_arch_x86_64 TRUE)
else()
message(FATAL_ERROR "Invalid OS X arch name: ${osx_arch}")
endif()
endforeach()
# Now add all the architectures in our normalized order
if(osx_arch_ppc)
list(APPEND ARCH ppc)
endif()
if(osx_arch_i386)
list(APPEND ARCH i386)
endif()
if(osx_arch_x86_64)
list(APPEND ARCH x86_64)
endif()
if(osx_arch_ppc64)
list(APPEND ARCH ppc64)
endif()
if(osx_arch_arm64)
list(APPEND ARCH arm64)
endif()
else()
file(WRITE "${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()
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