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https://github.com/qbittorrent/qBittorrent.git
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102 lines
4.9 KiB
CMake
102 lines
4.9 KiB
CMake
# Sets cache variable QBT_ADDITONAL_FLAGS and QBT_ADDITONAL_CXX_FLAGS to list of additional
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# compiler flags for C and C++ (QBT_ADDITONAL_FLAGS) and for C++ only (QBT_ADDITONAL_CXX_FLAGS)
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# and appends them to CMAKE_XXX_FLAGS variables.
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# It could use add_compile_options(), but then it is needed to use generator expressions,
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# and most interesting of them are not compatible with Visual Studio :(
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macro(qbt_set_compiler_options)
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# if (NOT QBT_ADDITONAL_FLAGS)
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if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
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#-Wshadow -Wconversion ?
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set(_GCC_COMMON_C_AND_CXX_FLAGS "-Wall -Wextra"
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"-Wcast-qual -Wcast-align"
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"-Winvalid-pch -Wno-long-long"
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#"-fstack-protector-all"
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#"-Werror -Wno-error=deprecated-declarations"
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)
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set(_GCC_COMMON_CXX_FLAGS "-fexceptions -frtti"
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"-Woverloaded-virtual -Wold-style-cast"
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"-Wnon-virtual-dtor"
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#"-Weffc++"
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#"-Werror -Wno-error=cpp"
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# we should modify code to make these ones obsolete
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#"-Wno-error=sign-conversion -Wno-error=float-equal"
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)
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if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
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# GCC 4.8 has problems with std::array and its initialization
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list(APPEND _GCC_COMMON_CXX_FLAGS "-Wno-error=missing-field-initializers")
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endif()
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include(CheckCXXCompilerFlag)
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# check for -pedantic
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check_cxx_compiler_flag(-pedantic _PEDANTIC_IS_SUPPORTED)
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if (_PEDANTIC_IS_SUPPORTED)
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list(APPEND _GCC_COMMON_CXX_FLAGS "-pedantic -pedantic-errors")
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else (_PEDANTIC_IS_SUPPORTED)
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list(APPEND _GCC_COMMON_CXX_FLAGS "-Wpedantic")
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endif (_PEDANTIC_IS_SUPPORTED)
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if (CMAKE_SYSTEM_NAME MATCHES Linux)
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# if Glibc version is 2.20 or higher, set -D_DEFAULT_SOURCE
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include(MacroGlibcDetect)
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message(STATUS "Detecting Glibc version...")
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glibc_detect(GLIBC_VERSION)
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if(${GLIBC_VERSION})
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if(GLIBC_VERSION LESS "220")
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message(STATUS "Glibc version is ${GLIBC_VERSION}")
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else(GLIBC_VERSION LESS "220")
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message(STATUS "Glibc version is ${GLIBC_VERSION}, adding -D_DEFAULT_SOURCE")
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add_definitions(-D_DEFAULT_SOURCE)
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endif(GLIBC_VERSION LESS "220")
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endif(${GLIBC_VERSION})
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endif (CMAKE_SYSTEM_NAME MATCHES Linux)
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if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
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# Clang 5.0 still doesn't support -Wstrict-null-sentinel
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check_cxx_compiler_flag(-Wstrict-null-sentinel _STRICT_NULL_SENTINEL_IS_SUPPORTED)
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if (_STRICT_NULL_SENTINEL_IS_SUPPORTED)
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list(APPEND _GCC_COMMON_CXX_FLAGS "-Wstrict-null-sentinel")
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endif (_STRICT_NULL_SENTINEL_IS_SUPPORTED)
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# Code should be improved to render this not needed
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list(APPEND _GCC_COMMON_CXX_FLAGS "-Wno-error=unused-function")
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else ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
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# GCC supports it
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list(APPEND _GCC_COMMON_CXX_FLAGS "-Wstrict-null-sentinel")
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endif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
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string(REPLACE ";" " " _GCC_COMMON_C_AND_CXX_FLAGS_STRING "${_GCC_COMMON_C_AND_CXX_FLAGS}")
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string(REPLACE ";" " " _GCC_COMMON_CXX_FLAGS_STRING "${_GCC_COMMON_CXX_FLAGS}")
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string(APPEND CMAKE_C_FLAGS " ${_GCC_COMMON_C_AND_CXX_FLAGS_STRING}")
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string(APPEND CMAKE_CXX_FLAGS " ${_GCC_COMMON_C_AND_CXX_FLAGS_STRING} ${_GCC_COMMON_CXX_FLAGS_STRING}")
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# check whether we can enable -Og optimization for debug build
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check_cxx_compiler_flag(-Og _DEBUG_OPTIMIZATION_LEVEL_IS_SUPPORTED)
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if (_DEBUG_OPTIMIZATION_LEVEL_IS_SUPPORTED)
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set(QBT_ADDITONAL_FLAGS "-Og -g3 -pipe" CACHE STRING
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"Additional qBittorent compile flags")
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set(QBT_ADDITONAL_CXX_FLAGS "-Og -g3 -pipe" CACHE STRING
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"Additional qBittorent C++ compile flags")
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else(_DEBUG_OPTIMIZATION_LEVEL_IS_SUPPORTED)
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set(QBT_ADDITONAL_FLAGS "-O0 -g3 -pipe" CACHE STRING
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"Additional qBittorent compile flags")
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set(QBT_ADDITONAL_CXX_FLAGS "-O0 -g3 -pipe" CACHE STRING
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"Additional qBittorent C++ compile flags")
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endif (_DEBUG_OPTIMIZATION_LEVEL_IS_SUPPORTED)
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endif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
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if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
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set(QBT_ADDITONAL_FLAGS "-wd4290 -wd4275 -wd4251 /W4" CACHE STRING "Additional qBittorent compile flags")
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endif ()
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string(APPEND CMAKE_C_FLAGS " ${QBT_ADDITONAL_FLAGS}")
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string(APPEND CMAKE_CXX_FLAGS " ${QBT_ADDITONAL_FLAGS}")
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# endif (NOT QBT_ADDITONAL_FLAGS)
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endmacro(qbt_set_compiler_options)
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