1# See absl/copts/copts.py and absl/copts/generate_copts.py 2include(GENERATED_AbseilCopts) 3 4set(ABSL_DEFAULT_LINKOPTS "") 5 6if (BUILD_SHARED_LIBS AND MSVC) 7 set(ABSL_BUILD_DLL TRUE) 8 set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON) 9else() 10 set(ABSL_BUILD_DLL FALSE) 11endif() 12 13if(APPLE AND CMAKE_CXX_COMPILER_ID MATCHES [[Clang]]) 14 # Some CMake targets (not known at the moment of processing) could be set to 15 # compile for multiple architectures as specified by the OSX_ARCHITECTURES 16 # property, which is target-specific. We should neither inspect nor rely on 17 # any CMake property or variable to detect an architecture, in particular: 18 # 19 # - CMAKE_OSX_ARCHITECTURES 20 # is just an initial value for OSX_ARCHITECTURES; set too early. 21 # 22 # - OSX_ARCHITECTURES 23 # is a per-target property; targets could be defined later, and their 24 # properties could be modified any time later. 25 # 26 # - CMAKE_SYSTEM_PROCESSOR 27 # does not reflect multiple architectures at all. 28 # 29 # When compiling for multiple architectures, a build system can invoke a 30 # compiler either 31 # 32 # - once: a single command line for multiple architectures (Ninja build) 33 # - twice: two command lines per each architecture (Xcode build system) 34 # 35 # If case of Xcode, it would be possible to set an Xcode-specific attributes 36 # like XCODE_ATTRIBUTE_OTHER_CPLUSPLUSFLAGS[arch=arm64] or similar. 37 # 38 # In both cases, the viable strategy is to pass all arguments at once, allowing 39 # the compiler to dispatch arch-specific arguments to a designated backend. 40 set(ABSL_RANDOM_RANDEN_COPTS "") 41 foreach(_arch IN ITEMS "x86_64" "arm64") 42 string(TOUPPER "${_arch}" _arch_uppercase) 43 string(REPLACE "X86_64" "X64" _arch_uppercase ${_arch_uppercase}) 44 foreach(_flag IN LISTS ABSL_RANDOM_HWAES_${_arch_uppercase}_FLAGS) 45 list(APPEND ABSL_RANDOM_RANDEN_COPTS "-Xarch_${_arch}" "${_flag}") 46 endforeach() 47 endforeach() 48 # If a compiler happens to deal with an argument for a currently unused 49 # architecture, it will warn about an unused command line argument. 50 option(ABSL_RANDOM_RANDEN_COPTS_WARNING OFF 51 "Warn if one of ABSL_RANDOM_RANDEN_COPTS is unused") 52 if(ABSL_RANDOM_RANDEN_COPTS AND NOT ABSL_RANDOM_RANDEN_COPTS_WARNING) 53 list(APPEND ABSL_RANDOM_RANDEN_COPTS "-Wno-unused-command-line-argument") 54 endif() 55elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|AMD64") 56 if (MSVC) 57 set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_MSVC_X64_FLAGS}") 58 else() 59 set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_X64_FLAGS}") 60 endif() 61elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm.*|aarch64") 62 if (CMAKE_SIZEOF_VOID_P STREQUAL "8") 63 set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_ARM64_FLAGS}") 64 elseif(CMAKE_SIZEOF_VOID_P STREQUAL "4") 65 set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_ARM32_FLAGS}") 66 else() 67 message(WARNING "Value of CMAKE_SIZEOF_VOID_P (${CMAKE_SIZEOF_VOID_P}) is not supported.") 68 endif() 69else() 70 set(ABSL_RANDOM_RANDEN_COPTS "") 71endif() 72 73 74if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU") 75 set(ABSL_DEFAULT_COPTS "${ABSL_GCC_FLAGS}") 76 set(ABSL_TEST_COPTS "${ABSL_GCC_TEST_FLAGS}") 77elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang") # MATCHES so we get both Clang and AppleClang 78 if(MSVC) 79 # clang-cl is half MSVC, half LLVM 80 set(ABSL_DEFAULT_COPTS "${ABSL_CLANG_CL_FLAGS}") 81 set(ABSL_TEST_COPTS "${ABSL_CLANG_CL_TEST_FLAGS}") 82 else() 83 set(ABSL_DEFAULT_COPTS "${ABSL_LLVM_FLAGS}") 84 set(ABSL_TEST_COPTS "${ABSL_LLVM_TEST_FLAGS}") 85 endif() 86elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC") 87 set(ABSL_DEFAULT_COPTS "${ABSL_MSVC_FLAGS}") 88 set(ABSL_TEST_COPTS "${ABSL_MSVC_TEST_FLAGS}") 89 set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}") 90else() 91 message(WARNING "Unknown compiler: ${CMAKE_CXX_COMPILER}. Building with no default flags") 92 set(ABSL_DEFAULT_COPTS "") 93 set(ABSL_TEST_COPTS "") 94endif() 95 96set(ABSL_CXX_STANDARD "${CMAKE_CXX_STANDARD}") 97