mirror of https://github.com/PurpleI2P/i2pd.git
Jeff Becker
7 years ago
2 changed files with 145 additions and 1 deletions
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# Based on the Qt 5 processor detection code, so should be very accurate |
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# https://qt.gitorious.org/qt/qtbase/blobs/master/src/corelib/global/qprocessordetection.h |
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# Currently handles arm (v5, v6, v7), x86 (32/64), ia64, and ppc (32/64) |
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# Regarding POWER/PowerPC, just as is noted in the Qt source, |
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# "There are many more known variants/revisions that we do not handle/detect." |
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set(archdetect_c_code " |
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#if defined(__arm__) || defined(__TARGET_ARCH_ARM) |
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#if defined(__ARM_ARCH_7__) \\ |
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|| defined(__ARM_ARCH_7A__) \\ |
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|| defined(__ARM_ARCH_7R__) \\ |
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|| defined(__ARM_ARCH_7M__) \\ |
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|| (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 7) |
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#error cmake_ARCH armv7 |
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#elif defined(__ARM_ARCH_6__) \\ |
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|| defined(__ARM_ARCH_6J__) \\ |
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|| defined(__ARM_ARCH_6T2__) \\ |
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|| defined(__ARM_ARCH_6Z__) \\ |
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|| defined(__ARM_ARCH_6K__) \\ |
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|| defined(__ARM_ARCH_6ZK__) \\ |
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|| defined(__ARM_ARCH_6M__) \\ |
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|| (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 6) |
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#error cmake_ARCH armv6 |
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#elif defined(__ARM_ARCH_5TEJ__) \\ |
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|| (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 5) |
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#error cmake_ARCH armv5 |
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#else |
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#error cmake_ARCH arm |
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#endif |
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#elif defined(__i386) || defined(__i386__) || defined(_M_IX86) |
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#error cmake_ARCH i386 |
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#elif defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(_M_X64) |
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#error cmake_ARCH x86_64 |
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#elif defined(__ia64) || defined(__ia64__) || defined(_M_IA64) |
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#error cmake_ARCH ia64 |
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#elif defined(__ppc__) || defined(__ppc) || defined(__powerpc__) \\ |
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|| defined(_ARCH_COM) || defined(_ARCH_PWR) || defined(_ARCH_PPC) \\ |
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|| defined(_M_MPPC) || defined(_M_PPC) |
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#if defined(__ppc64__) || defined(__powerpc64__) || defined(__64BIT__) |
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#error cmake_ARCH ppc64 |
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#else |
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#error cmake_ARCH ppc |
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#endif |
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#endif |
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#error cmake_ARCH unknown |
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") |
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# Set ppc_support to TRUE before including this file or ppc and ppc64 |
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# will be treated as invalid architectures since they are no longer supported by Apple |
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function(target_architecture output_var) |
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if(APPLE AND CMAKE_OSX_ARCHITECTURES) |
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# On OS X we use CMAKE_OSX_ARCHITECTURES *if* it was set |
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# First let's normalize the order of the values |
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# Note that it's not possible to compile PowerPC applications if you are using |
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# the OS X SDK version 10.6 or later - you'll need 10.4/10.5 for that, so we |
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# disable it by default |
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# See this page for more information: |
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# http://stackoverflow.com/questions/5333490/how-can-we-restore-ppc-ppc64-as-well-as-full-10-4-10-5-sdk-support-to-xcode-4 |
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# Architecture defaults to i386 or ppc on OS X 10.5 and earlier, depending on the CPU type detected at runtime. |
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# On OS X 10.6+ the default is x86_64 if the CPU supports it, i386 otherwise. |
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foreach(osx_arch ${CMAKE_OSX_ARCHITECTURES}) |
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if("${osx_arch}" STREQUAL "ppc" AND ppc_support) |
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set(osx_arch_ppc TRUE) |
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elseif("${osx_arch}" STREQUAL "i386") |
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set(osx_arch_i386 TRUE) |
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elseif("${osx_arch}" STREQUAL "x86_64") |
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set(osx_arch_x86_64 TRUE) |
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elseif("${osx_arch}" STREQUAL "ppc64" AND ppc_support) |
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set(osx_arch_ppc64 TRUE) |
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else() |
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message(FATAL_ERROR "Invalid OS X arch name: ${osx_arch}") |
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endif() |
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endforeach() |
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# Now add all the architectures in our normalized order |
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if(osx_arch_ppc) |
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list(APPEND ARCH ppc) |
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endif() |
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if(osx_arch_i386) |
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list(APPEND ARCH i386) |
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endif() |
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if(osx_arch_x86_64) |
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list(APPEND ARCH x86_64) |
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endif() |
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if(osx_arch_ppc64) |
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list(APPEND ARCH ppc64) |
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endif() |
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else() |
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file(WRITE "${CMAKE_BINARY_DIR}/arch.c" "${archdetect_c_code}") |
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enable_language(C) |
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# Detect the architecture in a rather creative way... |
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# This compiles a small C program which is a series of ifdefs that selects a |
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# particular #error preprocessor directive whose message string contains the |
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# target architecture. The program will always fail to compile (both because |
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# file is not a valid C program, and obviously because of the presence of the |
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# #error preprocessor directives... but by exploiting the preprocessor in this |
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# way, we can detect the correct target architecture even when cross-compiling, |
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# since the program itself never needs to be run (only the compiler/preprocessor) |
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try_run( |
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run_result_unused |
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compile_result_unused |
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"${CMAKE_BINARY_DIR}" |
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"${CMAKE_BINARY_DIR}/arch.c" |
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COMPILE_OUTPUT_VARIABLE ARCH |
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CMAKE_FLAGS CMAKE_OSX_ARCHITECTURES=${CMAKE_OSX_ARCHITECTURES} |
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) |
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# Parse the architecture name from the compiler output |
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string(REGEX MATCH "cmake_ARCH ([a-zA-Z0-9_]+)" ARCH "${ARCH}") |
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# Get rid of the value marker leaving just the architecture name |
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string(REPLACE "cmake_ARCH " "" ARCH "${ARCH}") |
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# If we are compiling with an unknown architecture this variable should |
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# already be set to "unknown" but in the case that it's empty (i.e. due |
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# to a typo in the code), then set it to unknown |
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if (NOT ARCH) |
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set(ARCH unknown) |
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endif() |
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endif() |
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set(${output_var} "${ARCH}" PARENT_SCOPE) |
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endfunction() |
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