148 lines
7.3 KiB
CMake
148 lines
7.3 KiB
CMake
include(CheckCXXCompilerFlag)
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###################################################
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# Activate C++14
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#
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# Uses: target_activate_cpp14(buildtarget)
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###################################################
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function(target_activate_cpp14 TARGET)
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if("${CMAKE_VERSION}" VERSION_GREATER "3.1")
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set_property(TARGET ${TARGET} PROPERTY CXX_STANDARD 14)
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set_property(TARGET ${TARGET} PROPERTY CXX_STANDARD_REQUIRED ON)
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else("${CMAKE_VERSION}" VERSION_GREATER "3.1")
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check_cxx_compiler_flag("-std=c++14" COMPILER_HAS_CPP14_SUPPORT)
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if (COMPILER_HAS_CPP14_SUPPORT)
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target_compile_options(${TARGET} PUBLIC -std=c++14)
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else(COMPILER_HAS_CPP14_SUPPORT)
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check_cxx_compiler_flag("-std=c++1y" COMPILER_HAS_CPP14_PARTIAL_SUPPORT)
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if (COMPILER_HAS_CPP14_PARTIAL_SUPPORT)
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target_compile_options(${TARGET} PUBLIC -std=c++1y)
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else()
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message(FATAL_ERROR "Compiler doesn't support C++14")
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endif()
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endif(COMPILER_HAS_CPP14_SUPPORT)
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endif("${CMAKE_VERSION}" VERSION_GREATER "3.1")
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# Ideally, we'd like to use libc++ on linux as well, but:
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# - http://stackoverflow.com/questions/37096062/get-a-basic-c-program-to-compile-using-clang-on-ubuntu-16
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# - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808086
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# so only use it on Apple systems...
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if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND APPLE)
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target_compile_options(${TARGET} PUBLIC -stdlib=libc++)
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endif(CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND APPLE)
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endfunction(target_activate_cpp14)
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# Find clang-tidy executable (for use in target_enable_style_warnings)
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find_program(
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CLANG_TIDY_EXE
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NAMES "clang-tidy"
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DOC "Path to clang-tidy executable"
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)
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if(NOT CLANG_TIDY_EXE)
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message(WARNING "clang-tidy not found. Checks are disabled")
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else()
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message(STATUS "clang-tidy found: ${CLANG_TIDY_EXE}")
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set(DO_CLANG_TIDY "${CLANG_TIDY_EXE}" "-system-headers=0")
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endif()
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#################################################
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# Enable style compiler warnings
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#
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# Uses: target_enable_style_warnings(buildtarget)
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#################################################
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function(target_enable_style_warnings TARGET)
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# Enable compiler options
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target_compile_options(${TARGET} PRIVATE -Wall -Wextra -Wold-style-cast -Wcast-align) # TODO consider -Wpedantic -Wchkp -Wcast-qual -Wctor-dtor-privacy -Wdisabled-optimization -Wformat=2 -Winit-self -Wlogical-op -Wmissing-include-dirs -Wnoexcept -Wold-style-cast -Woverloaded-virtual -Wredundant-decls -Wshadow -Wsign-promo -Wstrict-null-sentinel -Wstrict-overflow=5 -Wundef -Wno-unused -Wno-variadic-macros -Wno-parentheses -fdiagnostics-show-option -Wconversion and others?
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# Enable clang-tidy
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#set_target_properties(
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# ${TARGET} PROPERTIES
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# CXX_CLANG_TIDY "${DO_CLANG_TIDY}"
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#)
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endfunction(target_enable_style_warnings)
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##################################################
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# Add boost to the project
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#
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# Uses:
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# target_add_boost(buildtarget) # if you're only using header-only boost libs
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# target_add_boost(buildtarget system filesystem) # list all libraries to link against in the dependencies
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##################################################
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function(target_add_boost TARGET)
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# Load boost libraries
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if(NOT DEFINED Boost_USE_STATIC_LIBS OR Boost_USE_STATIC_LIBS)
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# Many supported systems don't have boost >= 1.56. Better link it statically.
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message(STATUS "Boost will be statically linked")
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set(Boost_USE_STATIC_LIBS ON)
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else(NOT DEFINED Boost_USE_STATIC_LIBS OR Boost_USE_STATIC_LIBS)
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message(STATUS "Boost will be dynamically linked")
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set(Boost_USE_STATIC_LIBS OFF)
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endif(NOT DEFINED Boost_USE_STATIC_LIBS OR Boost_USE_STATIC_LIBS)
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set(BOOST_THREAD_VERSION 4)
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find_package(Boost 1.56.0
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REQUIRED
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COMPONENTS ${ARGN})
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target_include_directories(${TARGET} SYSTEM PUBLIC ${Boost_INCLUDE_DIRS})
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target_link_libraries(${TARGET} PUBLIC ${Boost_LIBRARIES})
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target_compile_definitions(${TARGET} PUBLIC BOOST_THREAD_VERSION=4)
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if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
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# Also link to rt, because boost thread needs that.
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target_link_libraries(${TARGET} PUBLIC rt)
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endif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
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endfunction(target_add_boost)
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##################################################
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# Specify that a specific minimal version of gcc is required
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#
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# Uses:
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# require_gcc_version(4.9)
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##################################################
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function(require_gcc_version VERSION)
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if (CMAKE_COMPILER_IS_GNUCXX)
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execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion OUTPUT_VARIABLE GCC_VERSION)
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if (GCC_VERSION VERSION_LESS ${VERSION})
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message(FATAL_ERROR "Needs at least gcc version ${VERSION}, found gcc ${GCC_VERSION}")
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endif (GCC_VERSION VERSION_LESS ${VERSION})
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endif (CMAKE_COMPILER_IS_GNUCXX)
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endfunction(require_gcc_version)
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##################################################
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# Specify that a specific minimal version of clang is required
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#
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# Uses:
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# require_clang_version(3.5)
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##################################################
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function(require_clang_version VERSION)
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if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
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if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${VERSION})
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message(FATAL_ERROR "Needs at least clang version ${VERSION}, found clang ${CMAKE_CXX_COMPILER_VERSION}")
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endif (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${VERSION})
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endif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
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endfunction(require_clang_version)
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##################################################
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# Find the location of a library and return its full path in OUTPUT_VARIABLE.
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# If PATH_VARIABLE points to a defined variable, then the library will only be searched in this path.
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# If PATH_VARIABLE points to a undefined variable, default system locations will be searched.
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#
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# Uses (the following will search for fuse in system locations by default, and if the user passes -DFUSE_LIB_PATH to cmake, it will only search in this path.
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# find_library_with_path(MYLIBRARY fuse FUSE_LIB_PATH)
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# target_link_library(target ${MYLIBRARY})
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##################################################
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function(find_library_with_path OUTPUT_VARIABLE LIBRARY_NAME PATH_VARIABLE)
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if(${PATH_VARIABLE})
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find_library(${OUTPUT_VARIABLE} ${LIBRARY_NAME} PATHS ${${PATH_VARIABLE}} NO_DEFAULT_PATH)
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if (${OUTPUT_VARIABLE} MATCHES NOTFOUND)
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message(FATAL_ERROR "Didn't find ${LIBRARY_NAME} in path specified by the ${PATH_VARIABLE} parameter (${${PATH_VARIABLE}}). Pass in the correct path or remove the parameter to try common system locations.")
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else(${OUTPUT_VARIABLE} MATCHES NOTFOUND)
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message(STATUS "Found ${LIBRARY_NAME} in user-defined path ${${PATH_VARIABLE}}")
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endif(${OUTPUT_VARIABLE} MATCHES NOTFOUND)
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else(${PATH_VARIABLE})
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find_library(${OUTPUT_VARIABLE} ${LIBRARY_NAME})
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if (${OUTPUT_VARIABLE} MATCHES NOTFOUND)
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message(FATAL_ERROR "Didn't find ${LIBRARY_NAME} library. If ${LIBRARY_NAME} is installed, try passing in the library location with -D${PATH_VARIABLE}=/path/to/${LIBRARY_NAME}/lib.")
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else(${OUTPUT_VARIABLE} MATCHES NOTFOUND)
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message(STATUS "Found ${LIBRARY_NAME} in system location")
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endif(${OUTPUT_VARIABLE} MATCHES NOTFOUND)
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endif(${PATH_VARIABLE})
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endfunction(find_library_with_path)
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