228 lines
9.4 KiB
CMake
228 lines
9.4 KiB
CMake
# Macro which contains all bits to setup the compile flags correctly.
|
|
#
|
|
# compile_flags()
|
|
#
|
|
macro(compile_flags)
|
|
if(MSVC)
|
|
if(VCPKG_TARGET_TRIPLET MATCHES "-static" AND NOT VCPKG_TARGET_TRIPLET MATCHES "-md")
|
|
# Switch to MT (static) instead of MD (dynamic) binary
|
|
|
|
# For MSVC two generators are available
|
|
# - a command line generator (Ninja) using CMAKE_BUILD_TYPE to specify the
|
|
# configuration of the build tree
|
|
# - an IDE generator (Visual Studio) using CMAKE_CONFIGURATION_TYPES to
|
|
# specify all configurations that will be available in the generated solution
|
|
list(APPEND MSVC_CONFIGS "${CMAKE_BUILD_TYPE}" "${CMAKE_CONFIGURATION_TYPES}")
|
|
|
|
# Set usage of static runtime for all configurations
|
|
foreach(MSVC_CONFIG ${MSVC_CONFIGS})
|
|
string(TOUPPER "CMAKE_CXX_FLAGS_${MSVC_CONFIG}" MSVC_FLAGS)
|
|
string(REPLACE "/MD" "/MT" ${MSVC_FLAGS} "${${MSVC_FLAGS}}")
|
|
string(TOUPPER "CMAKE_C_FLAGS_${MSVC_CONFIG}" MSVC_FLAGS)
|
|
string(REPLACE "/MD" "/MT" ${MSVC_FLAGS} "${${MSVC_FLAGS}}")
|
|
endforeach()
|
|
endif()
|
|
|
|
# "If /Zc:rvalueCast is specified, the compiler follows section 5.4 of the
|
|
# C++11 standard". We need C++11 for the way we use threads.
|
|
add_compile_options(/Zc:rvalueCast)
|
|
|
|
if(NOT CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
|
|
add_compile_options(
|
|
/MP # Enable multi-threaded compilation.
|
|
/FC # Display the full path of source code files passed to the compiler in diagnostics.
|
|
)
|
|
endif()
|
|
endif()
|
|
|
|
# Add some -D flags for Debug builds. We cannot use add_definitions(), because
|
|
# it does not appear to support the $<> tags.
|
|
add_compile_options(
|
|
"$<$<CONFIG:Debug>:-D_DEBUG>"
|
|
"$<$<NOT:$<CONFIG:Debug>>:-D_FORTIFY_SOURCE=2>" # FORTIFY_SOURCE should only be used in non-debug builds (requires -O1+)
|
|
)
|
|
if(CMAKE_BUILD_TYPE AND NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
|
|
add_compile_options(-DFEWER_ASSERTS)
|
|
endif()
|
|
if(MINGW)
|
|
add_link_options(
|
|
"$<$<NOT:$<CONFIG:Debug>>:-fstack-protector>" # Prevent undefined references when _FORTIFY_SOURCE > 0
|
|
)
|
|
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
|
|
add_compile_options(
|
|
"$<$<CONFIG:Debug>:-Wa,-mbig-obj>" # Switch to pe-bigobj-x86-64 as x64 Debug builds push pe-x86-64 to the limits (linking errors with ASLR, ...)
|
|
)
|
|
endif()
|
|
endif()
|
|
|
|
# Prepare a generator that checks if we are not a debug, and don't have asserts
|
|
# on. We need this later on to set some compile options for stable releases.
|
|
#set(IS_STABLE_RELEASE "$<AND:$<NOT:$<CONFIG:Debug>>,$<NOT:$<BOOL:${OPTION_USE_ASSERTS}>>>")
|
|
|
|
if(MSVC)
|
|
add_compile_options(/W3)
|
|
if(MSVC_VERSION GREATER 1929 AND CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
|
|
# Starting with version 19.30, there is an optimisation bug, see #9966 for details
|
|
# This flag disables the broken optimisation to work around the bug
|
|
add_compile_options(/d2ssa-rse-)
|
|
endif()
|
|
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
|
|
add_compile_options(
|
|
-W
|
|
-Wall
|
|
-Wcast-qual
|
|
-Wextra
|
|
-Wsign-compare
|
|
-Wundef
|
|
-Wpointer-arith
|
|
-Wwrite-strings
|
|
-Wredundant-decls
|
|
-Wformat-security
|
|
-Wformat=2
|
|
-Winit-self
|
|
"$<$<COMPILE_LANGUAGE:CXX>:-Wnon-virtual-dtor>"
|
|
|
|
# Often parameters are unused, which is fine.
|
|
-Wno-unused-parameter
|
|
# We use 'ABCD' multichar for SaveLoad chunks identifiers
|
|
-Wno-multichar
|
|
|
|
# Compilers complains about that we break strict-aliasing.
|
|
# On most places we don't see how to fix it, and it doesn't
|
|
# break anything. So disable strict-aliasing to make the
|
|
# compiler all happy.
|
|
-fno-strict-aliasing
|
|
)
|
|
|
|
if(NOT CMAKE_BUILD_TYPE)
|
|
# Sensible default if no build type specified
|
|
add_compile_options(-O2)
|
|
if(NOT CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
|
|
add_compile_options(-DNDEBUG)
|
|
endif()
|
|
endif(NOT CMAKE_BUILD_TYPE)
|
|
|
|
# When we are a stable release (Release build + USE_ASSERTS not set),
|
|
# assertations are off, which trigger a lot of warnings. We disable
|
|
# these warnings for these releases.
|
|
#if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
|
|
# add_compile_options(
|
|
# "$<${IS_STABLE_RELEASE}:-Wno-unused-variable>"
|
|
# "$<${IS_STABLE_RELEASE}:-Wno-unused-but-set-parameter>"
|
|
# "$<${IS_STABLE_RELEASE}:-Wno-unused-but-set-variable>"
|
|
# )
|
|
#else (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
|
|
# add_compile_options(
|
|
# "$<${IS_STABLE_RELEASE}:-Wno-unused-variable>"
|
|
# "$<${IS_STABLE_RELEASE}:-Wno-unused-parameter>"
|
|
# )
|
|
#endif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
|
|
|
|
# Ninja processes the output so the output from the compiler
|
|
# isn't directly to a terminal; hence, the default is
|
|
# non-coloured output. We can override this to get nicely
|
|
# coloured output, but since that might yield odd results with
|
|
# IDEs, we extract it to an option.
|
|
if(OPTION_FORCE_COLORED_OUTPUT)
|
|
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
|
|
add_compile_options (-fdiagnostics-color=always)
|
|
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
|
|
add_compile_options (-fcolor-diagnostics)
|
|
endif()
|
|
endif()
|
|
|
|
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
|
|
include(CheckCXXCompilerFlag)
|
|
check_cxx_compiler_flag("-flifetime-dse=1" LIFETIME_DSE_FOUND)
|
|
|
|
add_compile_options(
|
|
# GCC 4.2+ automatically assumes that signed overflows do
|
|
# not occur in signed arithmetics, whereas we are not
|
|
# sure that they will not happen. It furthermore complains
|
|
# about its own optimized code in some places.
|
|
"-fno-strict-overflow"
|
|
|
|
# Prevent optimisation supposing enums are in a range specified by the standard
|
|
# For details, see http://gcc.gnu.org/PR43680
|
|
"-fno-tree-vrp"
|
|
|
|
# -flifetime-dse=2 (default since GCC 6) doesn't play
|
|
# well with our custom pool item allocator
|
|
"$<$<BOOL:${LIFETIME_DSE_FOUND}>:-flifetime-dse=1>"
|
|
)
|
|
endif()
|
|
|
|
if(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
|
|
if (NOT CMAKE_OSX_ARCHITECTURES STREQUAL "arm64")
|
|
add_compile_options(
|
|
-fno-stack-check
|
|
)
|
|
|
|
include(CheckCXXCompilerFlag)
|
|
check_cxx_compiler_flag("-mno-sse4" NO_SSE4_FOUND)
|
|
|
|
if(NO_SSE4_FOUND)
|
|
add_compile_options(
|
|
# Don't use SSE4 for general sources to increase compatibility.
|
|
-mno-sse4
|
|
)
|
|
endif()
|
|
endif()
|
|
endif()
|
|
|
|
if(OPTION_COMPRESS_DEBUG)
|
|
include(CheckCXXCompilerFlag)
|
|
check_cxx_compiler_flag("-gz" GZ_FOUND)
|
|
|
|
if(GZ_FOUND)
|
|
# Compress debug sections.
|
|
add_compile_options(-gz)
|
|
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -gz")
|
|
endif()
|
|
endif(OPTION_COMPRESS_DEBUG)
|
|
|
|
if(OPTION_LTO)
|
|
include(CheckCXXCompilerFlag)
|
|
check_cxx_compiler_flag("-flto" LTO_FOUND)
|
|
|
|
if(LTO_FOUND)
|
|
# Enable LTO.
|
|
add_compile_options(-flto)
|
|
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -flto")
|
|
endif()
|
|
endif(OPTION_LTO)
|
|
|
|
if (OPTION_NO_WARN_UNINIT)
|
|
add_compile_options(-Wno-maybe-uninitialized -Wno-uninitialized)
|
|
endif (OPTION_NO_WARN_UNINIT)
|
|
|
|
if (EMSCRIPTEN)
|
|
add_compile_options(-Wno-deprecated-builtins)
|
|
endif()
|
|
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
|
|
add_compile_options(
|
|
-Wall
|
|
# warning #873: function ... ::operator new ... has no corresponding operator delete ...
|
|
-wd873
|
|
# warning #1292: unknown attribute "fallthrough"
|
|
-wd1292
|
|
# warning #1899: multicharacter character literal (potential portability problem)
|
|
-wd1899
|
|
# warning #2160: anonymous union qualifier is ignored
|
|
-wd2160
|
|
)
|
|
else()
|
|
message(FATAL_ERROR "No warning flags are set for this compiler yet; please consider creating a Pull Request to add support for this compiler.")
|
|
endif()
|
|
|
|
if(NOT WIN32 AND NOT HAIKU)
|
|
# rdynamic is used to get useful stack traces from crash reports.
|
|
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -rdynamic")
|
|
endif()
|
|
|
|
if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
|
|
# workaround for MacOS 10.13 and below which does not support std::variant, etc
|
|
add_definitions(-D_LIBCPP_DISABLE_AVAILABILITY)
|
|
endif()
|
|
endmacro()
|