1 # This file contains compile flags and general build configuration for Quassel
3 # (C) 2014-2020 by the Quassel Project <devel@quassel-irc.org>
5 # Redistribution and use is allowed according to the terms of the BSD license.
6 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
10 # Helper function to check for linker flag support
11 include(CheckCXXCompilerFlag)
12 function(check_and_set_linker_flag flag name outvar)
13 cmake_push_check_state(RESET)
14 set(CMAKE_REQUIRED_FLAGS "${flag}")
15 check_cxx_compiler_flag("" LINKER_SUPPORTS_${name})
16 if (LINKER_SUPPORTS_${name})
17 set(${outvar} "${${outvar}} ${flag}" PARENT_SCOPE)
19 cmake_pop_check_state()
22 # General compile settings
23 set(CMAKE_CXX_STANDARD 14)
24 set(CMAKE_CXX_STANDARD_REQUIRED OFF) # Rely on compile features if standard is not supported
25 set(CMAKE_CXX_EXTENSIONS OFF) # We like to be standard conform
27 set(CMAKE_CXX_VISIBILITY_PRESET hidden)
28 set(CMAKE_VISIBILITY_INLINES_HIDDEN ON)
29 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
31 # For GCC and Clang, enable a whole bunch of warnings
32 if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
34 -fdiagnostics-color=always
47 "$<$<BOOL:${FATAL_WARNINGS}>:-Werror>"
48 -Wno-error=deprecated # Don't break on Qt upgrades
50 "$<$<NOT:$<CONFIG:Debug>>:-U_FORTIFY_SOURCE;-D_FORTIFY_SOURCE=2>"
53 # ssp is currently very broken on MinGW
55 add_compile_options(-fstack-protector-strong)
58 # Check for and set linker flags
59 check_and_set_linker_flag("-Wl,-z,relro" RELRO LINKER_FLAGS)
60 check_and_set_linker_flag("-Wl,-z,now" NOW LINKER_FLAGS)
61 check_and_set_linker_flag("-Wl,--as-needed" AS_NEEDED LINKER_FLAGS)
62 check_and_set_linker_flag("-Wl,--enable-new-dtags" ENABLE_NEW_DTAGS LINKER_FLAGS)
63 check_and_set_linker_flag("-Wl,--no-undefined" NO_UNDEFINED LINKER_FLAGS)
65 set(CMAKE_EXE_LINKER_FLAGS "${LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}")
66 set(CMAKE_MODULE_LINKER_FLAGS "${LINKER_FLAGS} ${CMAKE_MODULE_LINKER_FLAGS}")
67 set(CMAKE_SHARED_LINKER_FLAGS "${LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}")
70 # Target Windows Vista
71 add_definitions(-D_WIN32_WINNT=0x0600 -DWINVER=0x0600 -D_WIN32_IE=0x0600)
73 # Various settings for the Windows API
74 add_definitions(-DWIN32_LEAN_AND_MEAN -DUNICODE -D_UNICODE -D_USE_MATH_DEFINES -DNOMINMAX)
79 "$<$<BOOL:${FATAL_WARNINGS}>:/WX>"
82 # Increase warning level on MSVC
83 # CMake puts /W3 in CMAKE_CXX_FLAGS which will be appended later, so we need to replace
84 string(REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
86 # Silence annoying/useless warnings
87 # C4127: conditional expression is constant
88 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4127")
89 # C4244: 'identifier': conversion from 't1' to 't2', possible loss of data
90 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4244")
91 # C4456: declaration of 'identifier' hides previous local declaration
92 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4456")
93 # C4458: declaration of 'identifier' hides class member
94 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4458")
95 # C4996: deprecation warnings
96 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4996")
98 # Link against the correct version of the C runtime
99 set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/NODEFAULTLIB:libcmt /DEFAULTLIB:msvcrt ${CMAKE_EXE_LINKER_FLAGS_RELEASE}")
100 set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "/NODEFAULTLIB:libcmt /DEFAULTLIB:msvcrt ${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
101 set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "/NODEFAULTLIB:libcmt /DEFAULTLIB:msvcrt ${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL}")
102 set(CMAKE_EXE_LINKER_FLAGS_DEBUG "/NODEFAULTLIB:libcmtd /DEFAULTLIB:msvcrtd ${CMAKE_EXE_LINKER_FLAGS_DEBUG}")
105 # For other compilers, we rely on default settings (unless someone provides a good set of options; patches welcome!)
106 message(WARNING "${CMAKE_CXX_COMPILER_ID} is not a supported C++ compiler.")
111 set(CMAKE_OSX_ARCHITECTURES "x86_64")
113 -mmacosx-version-min=10.9
116 add_definitions(-DQT_MAC_USE_COCOA -D_DARWIN_C_SOURCE)
119 # Optionally, produce clazy warnings
120 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
121 option(ENABLE_CLAZY "Enable Clazy warnings" OFF)
124 set(CMAKE_CXX_COMPILE_OBJECT "${CMAKE_CXX_COMPILE_OBJECT} -Xclang -load -Xclang ClangLazy${CMAKE_SHARED_LIBRARY_SUFFIX} -Xclang -add-plugin -Xclang clang-lazy")
128 # Append CMAKE_CXX_FLAGS, so our flags can be overwritten externally.
129 process_cmake_cxx_flags()