1# ---------------------------------------------------------------------------- 2# Detect Microsoft compiler: 3# ---------------------------------------------------------------------------- 4if(CMAKE_CL_64) 5 set(MSVC64 1) 6endif() 7 8if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang") 9 set(CMAKE_COMPILER_IS_GNUCXX 1) 10 set(CMAKE_COMPILER_IS_CLANGCXX 1) 11endif() 12if(CMAKE_C_COMPILER_ID STREQUAL "Clang") 13 set(CMAKE_COMPILER_IS_GNUCC 1) 14 set(CMAKE_COMPILER_IS_CLANGCC 1) 15endif() 16 17if((CMAKE_COMPILER_IS_CLANGCXX OR CMAKE_COMPILER_IS_CLANGCC) AND NOT CMAKE_GENERATOR MATCHES "Xcode") 18 set(ENABLE_PRECOMPILED_HEADERS OFF CACHE BOOL "" FORCE) 19endif() 20 21# ---------------------------------------------------------------------------- 22# Detect Intel ICC compiler -- for -fPIC in 3rdparty ( UNIX ONLY ): 23# see include/opencv/cxtypes.h file for related ICC & CV_ICC defines. 24# NOTE: The system needs to determine if the '-fPIC' option needs to be added 25# for the 3rdparty static libs being compiled. The CMakeLists.txt files 26# in 3rdparty use the CV_ICC definition being set here to determine if 27# the -fPIC flag should be used. 28# ---------------------------------------------------------------------------- 29if(UNIX) 30 if (__ICL) 31 set(CV_ICC __ICL) 32 elseif(__ICC) 33 set(CV_ICC __ICC) 34 elseif(__ECL) 35 set(CV_ICC __ECL) 36 elseif(__ECC) 37 set(CV_ICC __ECC) 38 elseif(__INTEL_COMPILER) 39 set(CV_ICC __INTEL_COMPILER) 40 elseif(CMAKE_C_COMPILER MATCHES "icc") 41 set(CV_ICC icc_matches_c_compiler) 42 endif() 43endif() 44 45if(MSVC AND CMAKE_C_COMPILER MATCHES "icc") 46 set(CV_ICC __INTEL_COMPILER_FOR_WINDOWS) 47endif() 48 49# ---------------------------------------------------------------------------- 50# Detect GNU version: 51# ---------------------------------------------------------------------------- 52if(CMAKE_COMPILER_IS_CLANGCXX) 53 set(CMAKE_GCC_REGEX_VERSION "4.2.1") 54 set(CMAKE_OPENCV_GCC_VERSION_MAJOR 4) 55 set(CMAKE_OPENCV_GCC_VERSION_MINOR 2) 56 set(CMAKE_OPENCV_GCC_VERSION 42) 57 set(CMAKE_OPENCV_GCC_VERSION_NUM 402) 58 59 execute_process(COMMAND ${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1} -v 60 ERROR_VARIABLE CMAKE_OPENCV_CLANG_VERSION_FULL 61 ERROR_STRIP_TRAILING_WHITESPACE) 62 63 string(REGEX MATCH "version.*$" CMAKE_OPENCV_CLANG_VERSION_FULL "${CMAKE_OPENCV_CLANG_VERSION_FULL}") 64 string(REGEX MATCH "[0-9]+\\.[0-9]+" CMAKE_CLANG_REGEX_VERSION "${CMAKE_OPENCV_CLANG_VERSION_FULL}") 65 66elseif(CMAKE_COMPILER_IS_GNUCXX) 67 execute_process(COMMAND ${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1} -dumpversion 68 OUTPUT_VARIABLE CMAKE_OPENCV_GCC_VERSION_FULL 69 OUTPUT_STRIP_TRAILING_WHITESPACE) 70 71 execute_process(COMMAND ${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1} -v 72 ERROR_VARIABLE CMAKE_OPENCV_GCC_INFO_FULL 73 OUTPUT_STRIP_TRAILING_WHITESPACE) 74 75 # Typical output in CMAKE_OPENCV_GCC_VERSION_FULL: "c+//0 (whatever) 4.2.3 (...)" 76 # Look for the version number 77 string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" CMAKE_GCC_REGEX_VERSION "${CMAKE_OPENCV_GCC_VERSION_FULL}") 78 if(NOT CMAKE_GCC_REGEX_VERSION) 79 string(REGEX MATCH "[0-9]+\\.[0-9]+" CMAKE_GCC_REGEX_VERSION "${CMAKE_OPENCV_GCC_VERSION_FULL}") 80 endif() 81 82 # Split the three parts: 83 string(REGEX MATCHALL "[0-9]+" CMAKE_OPENCV_GCC_VERSIONS "${CMAKE_GCC_REGEX_VERSION}") 84 85 list(GET CMAKE_OPENCV_GCC_VERSIONS 0 CMAKE_OPENCV_GCC_VERSION_MAJOR) 86 list(GET CMAKE_OPENCV_GCC_VERSIONS 1 CMAKE_OPENCV_GCC_VERSION_MINOR) 87 88 set(CMAKE_OPENCV_GCC_VERSION ${CMAKE_OPENCV_GCC_VERSION_MAJOR}${CMAKE_OPENCV_GCC_VERSION_MINOR}) 89 math(EXPR CMAKE_OPENCV_GCC_VERSION_NUM "${CMAKE_OPENCV_GCC_VERSION_MAJOR}*100 + ${CMAKE_OPENCV_GCC_VERSION_MINOR}") 90 message(STATUS "Detected version of GNU GCC: ${CMAKE_OPENCV_GCC_VERSION} (${CMAKE_OPENCV_GCC_VERSION_NUM})") 91 92 if(WIN32) 93 execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpmachine 94 OUTPUT_VARIABLE OPENCV_GCC_TARGET_MACHINE 95 OUTPUT_STRIP_TRAILING_WHITESPACE) 96 if(OPENCV_GCC_TARGET_MACHINE MATCHES "amd64|x86_64|AMD64") 97 set(MINGW64 1) 98 endif() 99 endif() 100endif() 101 102if(MSVC64 OR MINGW64) 103 set(X86_64 1) 104elseif(MINGW OR (MSVC AND NOT CMAKE_CROSSCOMPILING)) 105 set(X86 1) 106elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64.*|x86_64.*|AMD64.*") 107 set(X86_64 1) 108elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "i686.*|i386.*|x86.*|amd64.*|AMD64.*") 109 set(X86 1) 110elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm.*|ARM.*)") 111 set(ARM 1) 112elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)") 113 set(AARCH64 1) 114endif() 115 116 117# Similar code exists in OpenCVConfig.cmake 118if(NOT DEFINED OpenCV_STATIC) 119 # look for global setting 120 if(NOT DEFINED BUILD_SHARED_LIBS OR BUILD_SHARED_LIBS) 121 set(OpenCV_STATIC OFF) 122 else() 123 set(OpenCV_STATIC ON) 124 endif() 125endif() 126 127if(MSVC) 128 if(CMAKE_CL_64) 129 set(OpenCV_ARCH x64) 130 elseif((CMAKE_GENERATOR MATCHES "ARM") OR ("${arch_hint}" STREQUAL "ARM") OR (CMAKE_VS_EFFECTIVE_PLATFORMS MATCHES "ARM|arm")) 131 # see Modules/CmakeGenericSystem.cmake 132 set(OpenCV_ARCH ARM) 133 else() 134 set(OpenCV_ARCH x86) 135 endif() 136 if(MSVC_VERSION EQUAL 1400) 137 set(OpenCV_RUNTIME vc8) 138 elseif(MSVC_VERSION EQUAL 1500) 139 set(OpenCV_RUNTIME vc9) 140 elseif(MSVC_VERSION EQUAL 1600) 141 set(OpenCV_RUNTIME vc10) 142 elseif(MSVC_VERSION EQUAL 1700) 143 set(OpenCV_RUNTIME vc11) 144 elseif(MSVC_VERSION EQUAL 1800) 145 set(OpenCV_RUNTIME vc12) 146 elseif(MSVC_VERSION EQUAL 1900) 147 set(OpenCV_RUNTIME vc14) 148 endif() 149elseif(MINGW) 150 set(OpenCV_RUNTIME mingw) 151 152 if(MINGW64) 153 set(OpenCV_ARCH x64) 154 else() 155 set(OpenCV_ARCH x86) 156 endif() 157endif() 158