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Use better available linkers (mold > lld > gold > ld)
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def
parent
41b17e6ead
commit
e0a55f8bdd
122
CMakeLists.txt
122
CMakeLists.txt
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@ -82,6 +82,9 @@ endif()
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include(CheckCCompilerFlag)
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include(CheckCXXCompilerFlag)
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if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.18)
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include(CheckLinkerFlag)
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endif()
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include(CheckSymbolExists)
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if(NOT (CMAKE_SYSTEM_NAME STREQUAL "Emscripten"))
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include(CheckAtomic)
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@ -128,6 +131,7 @@ option(VULKAN "Enable the vulkan backend" ${AUTO_VULKAN_BACKEND})
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option(EXCEPTION_HANDLING "Enable exception handling (only works with Windows as of now)" OFF)
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option(IPO "Enable interprocedural optimizations" OFF)
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option(FUSE_LD "Linker to use" OFF)
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if(CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
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include(${PROJECT_SOURCE_DIR}/cmake/toolchains/Emscripten.toolchain)
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@ -189,7 +193,7 @@ set(CLIENT_EXECUTABLE DDNet CACHE STRING "Name of the build client executable")
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# Compiler flags
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########################################################################
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function(add_c_compiler_flag_if_supported VARIABLE FLAG)
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function(add_compiler_flag_if_supported VARIABLE FLAG)
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if(ARGC GREATER 2)
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set(CHECKED_FLAG "${ARGV2}")
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else()
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@ -206,79 +210,131 @@ function(add_c_compiler_flag_if_supported VARIABLE FLAG)
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endif()
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endfunction()
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function(add_linker_flag_if_supported VARIABLE FLAG)
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if(ARGC GREATER 2)
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set(CHECKED_FLAG "${ARGV2}")
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else()
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set(CHECKED_FLAG "${FLAG}")
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endif()
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string(REGEX REPLACE "[^A-Za-z0-9]" "_" CONFIG_VARIABLE "FLAG_SUPPORTED${CHECKED_FLAG}")
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if(CMAKE_VERSION VERSION_LESS 3.18)
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set(${CONFIG_VARIABLE} OFF)
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else()
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check_linker_flag(C "${CHECKED_FLAG}" ${CONFIG_VARIABLE})
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endif()
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if(${CONFIG_VARIABLE})
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if(${VARIABLE})
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set("${VARIABLE}" "${${VARIABLE}};${FLAG}" PARENT_SCOPE)
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else()
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set("${VARIABLE}" "${FLAG}" PARENT_SCOPE)
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endif()
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endif()
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endfunction()
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# Force compiler colors on when using ninja. Ninja filters the colors out when
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# it's not printing to a terminal on its own.
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if(CMAKE_GENERATOR STREQUAL "Ninja")
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add_c_compiler_flag_if_supported(OUR_FLAGS -fdiagnostics-color=always)
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add_c_compiler_flag_if_supported(OUR_FLAGS -fcolor-diagnostics)
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add_compiler_flag_if_supported(OUR_FLAGS -fdiagnostics-color=always)
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add_compiler_flag_if_supported(OUR_FLAGS -fcolor-diagnostics)
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endif()
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if(NOT MSVC AND NOT HAIKU)
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if(NOT FUSE_LD STREQUAL OFF)
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add_linker_flag_if_supported(OUR_FLAGS_LINK -fuse-ld=${FUSE_LD})
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if(FLAG_SUPPORTED_fuse_ld_${FUSE_LD})
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message(STATUS "Using ${FUSE_LD} linker")
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endif()
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else()
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if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR NOT ENABLE_IPO)
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# GCC+LTO: pthread_create has failed: Resource temporarily unavailable
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add_linker_flag_if_supported(OUR_FLAGS_LINK -fuse-ld=mold)
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if(FLAG_SUPPORTED_fuse_ld_mold)
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message(STATUS "Using mold linker")
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else()
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# Does not support GCC+LTO
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add_linker_flag_if_supported(OUR_FLAGS_LINK -fuse-ld=lld)
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if(FLAG_SUPPORTED_fuse_ld_lld)
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message(STATUS "Using lld linker")
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else()
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add_linker_flag_if_supported(OUR_FLAGS_LINK -fuse-ld=gold)
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if(FLAG_SUPPORTED_fuse_ld_gold)
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message(STATUS "Using gold linker")
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endif()
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endif()
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endif()
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else()
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add_linker_flag_if_supported(OUR_FLAGS_LINK -fuse-ld=gold)
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if(FLAG_SUPPORTED_fuse_ld_gold)
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message(STATUS "Using gold linker")
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endif()
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endif()
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endif()
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if(CMAKE_VERSION VERSION_LESS 3.1 OR TARGET_OS STREQUAL "mac")
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -std=gnu++17)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -std=gnu++17)
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endif()
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# Protect the stack pointer.
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# -fstack-protector-all doesn't work on MinGW.
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add_c_compiler_flag_if_supported(OUR_FLAGS -fstack-protector-all)
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add_compiler_flag_if_supported(OUR_FLAGS -fstack-protector-all)
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# Disable exceptions as DDNet does not use them.
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add_c_compiler_flag_if_supported(OUR_FLAGS -fno-exceptions)
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add_compiler_flag_if_supported(OUR_FLAGS -fno-exceptions)
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# Inaccurate floating point numbers cause problems on mingw-w64-gcc when
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# compiling for x86, might cause problems elsewhere. So don't store floats
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# in registers but keep them at higher accuracy.
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if(TARGET_ARCH STREQUAL "x86")
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add_c_compiler_flag_if_supported(OUR_FLAGS -ffloat-store)
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add_compiler_flag_if_supported(OUR_FLAGS -ffloat-store)
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endif()
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# Don't insert timestamps into PEs to keep the build reproducible.
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if(TARGET_OS STREQUAL "windows")
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add_c_compiler_flag_if_supported(OUR_FLAGS_LINK -Wl,--no-insert-timestamp)
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add_compiler_flag_if_supported(OUR_FLAGS_LINK -Wl,--no-insert-timestamp)
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endif()
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if(TARGET_OS STREQUAL "mac")
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add_c_compiler_flag_if_supported(OUR_FLAGS -stdlib=libc++)
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add_compiler_flag_if_supported(OUR_FLAGS -stdlib=libc++)
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endif()
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if(EXCEPTION_HANDLING)
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add_c_compiler_flag_if_supported(OUR_FLAGS -DCONF_EXCEPTION_HANDLING)
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add_compiler_flag_if_supported(OUR_FLAGS -DCONF_EXCEPTION_HANDLING)
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# use the frame pointer (frame pointer usage is disabled by default in
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# some architectures like x86_64 and for some optimization levels; and it
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# may be impossible to walk the call stack without it)
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add_c_compiler_flag_if_supported(OUR_FLAGS -fno-omit-frame-pointer)
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add_compiler_flag_if_supported(OUR_FLAGS -fno-omit-frame-pointer)
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endif()
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wall)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wall)
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if(CMAKE_VERSION VERSION_GREATER 3.3 OR CMAKE_VERSION VERSION_EQUAL 3.3)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN
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add_compiler_flag_if_supported(OUR_FLAGS_OWN
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$<$<COMPILE_LANGUAGE:C>:-Wdeclaration-after-statement>
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-Wdeclaration-after-statement
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)
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endif()
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wextra)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-unused-parameter)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-missing-field-initializers)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wformat=2) # Warn about format strings.
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add_c_compiler_flag_if_supported(OUR_FLAGS_DEP -Wno-implicit-function-declaration)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-nullability-completeness) # Mac OS build on github
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-tautological-constant-out-of-range-compare) # Check needed for x86, but warns on x86-64
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wduplicated-cond)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wduplicated-branches)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wlogical-op)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wrestrict)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wshadow-all) # clang
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wshadow=global) # gcc
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wthread-safety)
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add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wsuggest-override)
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# add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wdouble-promotion) # Many occurences
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# add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wnull-dereference) # Many occurences
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# add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wuseless-cast) # TODO: Enable for C++ code except gtest
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wextra)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-unused-parameter)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-missing-field-initializers)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wformat=2) # Warn about format strings.
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add_compiler_flag_if_supported(OUR_FLAGS_DEP -Wno-implicit-function-declaration)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-nullability-completeness) # Mac OS build on github
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wno-tautological-constant-out-of-range-compare) # Check needed for x86, but warns on x86-64
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wduplicated-cond)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wduplicated-branches)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wlogical-op)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wrestrict)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wshadow-all) # clang
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wshadow=global) # gcc
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wthread-safety)
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add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wsuggest-override)
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# add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wdouble-promotion) # Many occurences
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# add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wnull-dereference) # Many occurences
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# add_compiler_flag_if_supported(OUR_FLAGS_OWN -Wuseless-cast) # TODO: Enable for C++ code except gtest
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endif()
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if(MSVC)
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if(EXCEPTION_HANDLING)
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add_c_compiler_flag_if_supported(OUR_FLAGS /DCONF_EXCEPTION_HANDLING)
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add_compiler_flag_if_supported(OUR_FLAGS /DCONF_EXCEPTION_HANDLING)
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endif()
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endif()
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@ -2882,7 +2938,7 @@ source_group_tree(src)
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if(ANTIBOT)
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# Allow the antibot library to use functions from the server binary.
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add_c_compiler_flag_if_supported(OUR_FLAGS_LINK -rdynamic)
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add_compiler_flag_if_supported(OUR_FLAGS_LINK -rdynamic)
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set_own_rpath(${TARGET_SERVER})
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endif()
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