166 lines
6.4 KiB
CMake
166 lines
6.4 KiB
CMake
# Compiler recognition
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set(COMPILER_MSVC 0)
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set(COMPILER_GCC 0)
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set(COMPILER_CLANG 0)
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# ToDo: extend as necessary and remove common assumptions
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if(MSVC)
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set(COMPILER_MSVC 1)
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else()
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if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
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set(COMPILER_CLANG 1)
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else()
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set(COMPILER_GCC 1)
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endif()
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set(USE_GCC_FLAGS 1)
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endif()
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function(set_compiler_flags target)
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if(NOT MSVC)
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set_gcc_flags()
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target_compile_options(${target} PRIVATE "${AWS_COMPILER_FLAGS}")
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string(REPLACE ";" " " _TMP "${AWS_COMPILER_FLAGS}")
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set(PKG_CONFIG_CFLAGS "${_TMP}" CACHE INTERNAL "C++ compiler flags which affect the ABI")
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endif()
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endfunction()
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function(set_compiler_warnings target)
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if(NOT MSVC)
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set_gcc_warnings()
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target_compile_options(${target} PRIVATE "${AWS_COMPILER_WARNINGS}")
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endif()
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endfunction()
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macro(set_gcc_flags)
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list(APPEND AWS_COMPILER_FLAGS "-fno-exceptions" "-std=c++${CPP_STANDARD}")
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if(NOT BUILD_SHARED_LIBS)
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list(APPEND AWS_COMPILER_FLAGS "-fPIC")
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endif()
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if(NOT ENABLE_RTTI)
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list(APPEND AWS_COMPILER_FLAGS "-fno-rtti")
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endif()
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if(MINIMIZE_SIZE AND COMPILER_GCC)
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list(APPEND AWS_COMPILER_FLAGS "-s")
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endif()
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if(NOT BUILD_SHARED_LIBS AND NOT ENABLE_VIRTUAL_OPERATIONS)
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list(APPEND AWS_COMPILER_FLAGS "-ffunction-sections;-fdata-sections")
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endif()
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endmacro()
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macro(set_gcc_warnings)
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#list(APPEND AWS_COMPILER_WARNINGS "-Wall" "-Werror" "-pedantic" "-Wextra")
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list(APPEND AWS_COMPILER_WARNINGS "-Wall" "-pedantic" "-Wextra")
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if(COMPILER_CLANG)
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if(PLATFORM_ANDROID)
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# when using clang with libc and API lower than 21 we need to include Android support headers and ignore the gnu-include-next warning.
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if(ANDROID_STL MATCHES "libc" AND ANDROID_NATIVE_API_LEVEL_NUM LESS "21")
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# NDK lower than 12 doesn't support ignoring the gnu-include-next warning so we need to disable pedantic mode.
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if(NDK_RELEASE_NUMBER LESS "12000")
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string(REGEX REPLACE "-pedantic" "" AWS_COMPILER_WARNINGS "${AWS_COMPILER_WARNINGS}")
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else()
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list(APPEND AWS_COMPILER_WARNINGS "-Wno-gnu-include-next")
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endif()
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endif()
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endif()
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endif()
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endmacro()
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macro(set_msvc_flags)
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if(MSVC)
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# Put all runtime outputs, including DLLs, executables into one directory, so as to avoid copying DLLs.
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set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin")
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# Based on the FORCE_SHARED_CRT and BUILD_SHARED_LIBS options, make sure our compile/link flags bring in the right CRT library
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# modified from gtest's version; while only the else clause is actually necessary, do both for completeness/future-proofing
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foreach (var
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CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
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CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
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if(BUILD_SHARED_LIBS OR FORCE_SHARED_CRT)
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string(REPLACE "/MT" "/MD" ${var} "${${var}}")
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else()
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string(REPLACE "/MD" "/MT" ${var} "${${var}}")
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endif()
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endforeach()
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# enable parallel builds
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP")
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# some of the clients are exceeding the 16-bit code section limit when building x64 debug, so use /bigobj when we build
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /bigobj")
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if(NOT ENABLE_RTTI)
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string(REGEX REPLACE "/GR " " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
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endif()
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# special windows build options:
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# debug info: pdbs with dlls, embedded in static libs
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# release optimisations to purely focus on size, override debug info settings as necessary
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if(BUILD_SHARED_LIBS)
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set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Zi")
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set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /DEBUG /OPT:REF /OPT:ICF")
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else()
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if(CMAKE_CXX_FLAGS MATCHES "/Zi")
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string(REGEX REPLACE "/Zi" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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endif()
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if(CMAKE_CXX_FLAGS_DEBUG MATCHES "/Zi")
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message(STATUS "Clearing pdb setting")
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string(REGEX REPLACE "/Zi" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
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endif()
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# put Z7 in config-specific flags so we can strip from release if we're concerned about size
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set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Z7")
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set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /Z7")
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endif()
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if(MINIMIZE_SIZE)
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# strip debug info from release
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string(REGEX REPLACE "/Z[a-zA-Z0-9]" "" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
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string(REGEX REPLACE "/DEBUG" "" CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE}")
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# strip optimization settings and replace with
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string(REGEX REPLACE "/O[a-zA-Z0-9]*" "" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
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# pure size flags
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set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /O1 /Ob0 /Os")
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endif()
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endif()
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endmacro()
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macro(set_msvc_warnings)
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if(MSVC)
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#remove bogus errors at generation time if these variables haven't been manually set
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if(NOT CMAKE_CONFIGURATION_TYPES)
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set(CMAKE_CONFIGURATION_TYPES "Debug;Release;MinSizeRel;RelWithDebInfo")
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endif()
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if(NOT CMAKE_CXX_FLAGS_DEBUGOPT)
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set(CMAKE_CXX_FLAGS_DEBUGOPT "")
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endif()
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if(NOT CMAKE_EXE_LINKER_FLAGS_DEBUGOPT)
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set(CMAKE_EXE_LINKER_FLAGS_DEBUGOPT "")
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endif()
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if(NOT CMAKE_SHARED_LINKER_FLAGS_DEBUGOPT)
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set(CMAKE_SHARED_LINKER_FLAGS_DEBUGOPT "")
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endif()
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# warnings as errors, max warning level (4)
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if(NOT CMAKE_CXX_FLAGS MATCHES "/WX")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /WX")
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endif()
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# taken from http://stackoverflow.com/questions/2368811/how-to-set-warning-level-in-cmake
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if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
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string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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else()
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
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endif()
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endif(MSVC)
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endmacro()
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