98 lines
4.1 KiB
CMake
98 lines
4.1 KiB
CMake
# See absl/copts/copts.py and absl/copts/generate_copts.py
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include(GENERATED_AbseilCopts)
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set(ABSL_DEFAULT_LINKOPTS "")
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if (BUILD_SHARED_LIBS AND MSVC)
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set(ABSL_BUILD_DLL TRUE)
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set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
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else()
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set(ABSL_BUILD_DLL FALSE)
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endif()
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if(APPLE AND CMAKE_CXX_COMPILER_ID MATCHES [[Clang]])
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# Some CMake targets (not known at the moment of processing) could be set to
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# compile for multiple architectures as specified by the OSX_ARCHITECTURES
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# property, which is target-specific. We should neither inspect nor rely on
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# any CMake property or variable to detect an architecture, in particular:
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#
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# - CMAKE_OSX_ARCHITECTURES
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# is just an initial value for OSX_ARCHITECTURES; set too early.
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#
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# - OSX_ARCHITECTURES
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# is a per-target property; targets could be defined later, and their
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# properties could be modified any time later.
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#
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# - CMAKE_SYSTEM_PROCESSOR
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# does not reflect multiple architectures at all.
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#
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# When compiling for multiple architectures, a build system can invoke a
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# compiler either
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#
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# - once: a single command line for multiple architectures (Ninja build)
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# - twice: two command lines per each architecture (Xcode build system)
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#
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# If case of Xcode, it would be possible to set an Xcode-specific attributes
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# like XCODE_ATTRIBUTE_OTHER_CPLUSPLUSFLAGS[arch=arm64] or similar.
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#
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# In both cases, the viable strategy is to pass all arguments at once, allowing
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# the compiler to dispatch arch-specific arguments to a designated backend.
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set(ABSL_RANDOM_RANDEN_COPTS "")
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foreach(_arch IN ITEMS "x86_64" "arm64")
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string(TOUPPER "${_arch}" _arch_uppercase)
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string(REPLACE "X86_64" "X64" _arch_uppercase ${_arch_uppercase})
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foreach(_flag IN LISTS ABSL_RANDOM_HWAES_${_arch_uppercase}_FLAGS)
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list(APPEND ABSL_RANDOM_RANDEN_COPTS "-Xarch_${_arch}" "${_flag}")
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endforeach()
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endforeach()
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# If a compiler happens to deal with an argument for a currently unused
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# architecture, it will warn about an unused command line argument.
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option(ABSL_RANDOM_RANDEN_COPTS_WARNING OFF
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"Warn if one of ABSL_RANDOM_RANDEN_COPTS is unused")
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if(ABSL_RANDOM_RANDEN_COPTS AND NOT ABSL_RANDOM_RANDEN_COPTS_WARNING)
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list(APPEND ABSL_RANDOM_RANDEN_COPTS "-Wno-unused-command-line-argument")
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endif()
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elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|AMD64")
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if (MSVC)
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set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_MSVC_X64_FLAGS}")
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else()
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set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_X64_FLAGS}")
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endif()
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elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm.*|aarch64")
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if (CMAKE_SIZEOF_VOID_P STREQUAL "8")
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set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_ARM64_FLAGS}")
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elseif(CMAKE_SIZEOF_VOID_P STREQUAL "4")
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set(ABSL_RANDOM_RANDEN_COPTS "${ABSL_RANDOM_HWAES_ARM32_FLAGS}")
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else()
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message(WARNING "Value of CMAKE_SIZEOF_VOID_P (${CMAKE_SIZEOF_VOID_P}) is not supported.")
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endif()
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else()
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message(WARNING "Value of CMAKE_SYSTEM_PROCESSOR (${CMAKE_SYSTEM_PROCESSOR}) is unknown and cannot be used to set ABSL_RANDOM_RANDEN_COPTS")
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set(ABSL_RANDOM_RANDEN_COPTS "")
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endif()
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if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
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set(ABSL_DEFAULT_COPTS "${ABSL_GCC_FLAGS}")
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set(ABSL_TEST_COPTS "${ABSL_GCC_FLAGS};${ABSL_GCC_TEST_FLAGS}")
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elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang") # MATCHES so we get both Clang and AppleClang
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if(MSVC)
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# clang-cl is half MSVC, half LLVM
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set(ABSL_DEFAULT_COPTS "${ABSL_CLANG_CL_FLAGS}")
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set(ABSL_TEST_COPTS "${ABSL_CLANG_CL_FLAGS};${ABSL_CLANG_CL_TEST_FLAGS}")
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else()
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set(ABSL_DEFAULT_COPTS "${ABSL_LLVM_FLAGS}")
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set(ABSL_TEST_COPTS "${ABSL_LLVM_FLAGS};${ABSL_LLVM_TEST_FLAGS}")
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endif()
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elseif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
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set(ABSL_DEFAULT_COPTS "${ABSL_MSVC_FLAGS}")
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set(ABSL_TEST_COPTS "${ABSL_MSVC_FLAGS};${ABSL_MSVC_TEST_FLAGS}")
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set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}")
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else()
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message(WARNING "Unknown compiler: ${CMAKE_CXX_COMPILER}. Building with no default flags")
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set(ABSL_DEFAULT_COPTS "")
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set(ABSL_TEST_COPTS "")
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endif()
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set(ABSL_CXX_STANDARD "${CMAKE_CXX_STANDARD}")
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