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Update LTO exclusion list (#14407)

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sfan5 2024-02-25 20:58:42 +01:00 committed by GitHub
parent 762fca538c
commit 4caf0e4cb9
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2 changed files with 27 additions and 15 deletions
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40
CMakeLists.txt
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@ -42,6 +42,18 @@ set(DEFAULT_ENABLE_LTO TRUE)
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
set(DEFAULT_ENABLE_LTO FALSE)
endif()
#### LTO testing list ####
# - Linux: seems to work always
# - win32/msvc: works
# - win32/gcc: fails to link
# - win32/clang: works
# - macOS on x86: seems to be fine
# - macOS on ARM: crashes, see <https://github.com/minetest/minetest/issues/14397>
# Note: since CMake has no easy architecture detection disabling for Mac entirely
#### ####
if((WIN32 AND CMAKE_CXX_COMPILER_ID STREQUAL "GNU") OR APPLE)
set(DEFAULT_ENABLE_LTO FALSE)
endif()
set(ENABLE_LTO ${DEFAULT_ENABLE_LTO} CACHE BOOL "Use Link Time Optimization")
set(DEFAULT_RUN_IN_PLACE FALSE)
@ -66,20 +78,6 @@ if(NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type: Debug or Release" FORCE)
endif()
# FIXME: Windows build fails in multiple places to link, needs to be investigated.
if (ENABLE_LTO AND NOT WIN32)
include(CheckIPOSupported)
check_ipo_supported(RESULT lto_supported OUTPUT lto_output)
if(lto_supported)
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
message(STATUS "LTO/IPO is enabled")
else()
message(STATUS "LTO/IPO requested but it is not supported by the compiler: ${lto_output}")
endif()
else()
message(STATUS "LTO/IPO is not enabled")
endif()
set(ENABLE_UPDATE_CHECKER (NOT ${DEVELOPMENT_BUILD}) CACHE BOOL
"Whether to enable update checks by default")
@ -163,6 +161,20 @@ elseif(BUILD_CLIENT AND TARGET IrrlichtMt::IrrlichtMt)
endif()
endif()
if (ENABLE_LTO OR CMAKE_INTERPROCEDURAL_OPTIMIZATION)
include(CheckIPOSupported)
check_ipo_supported(RESULT lto_supported OUTPUT lto_output)
if(lto_supported)
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
message(STATUS "LTO/IPO is enabled")
else()
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION FALSE)
message(STATUS "LTO/IPO was requested but is not supported by the compiler: ${lto_output}")
endif()
else()
message(STATUS "LTO/IPO is not enabled")
endif()
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "${GCC_MINIMUM_VERSION}")
message(FATAL_ERROR "Insufficient gcc version, found ${CMAKE_CXX_COMPILER_VERSION}. "

2
doc/compiling/README.md
View File

@ -28,7 +28,7 @@ General options and their default values:
ENABLE_REDIS=ON - Build with libhiredis; Enables use of Redis map backend
ENABLE_SPATIAL=ON - Build with LibSpatial; Speeds up AreaStores
ENABLE_SOUND=ON - Build with OpenAL, libogg & libvorbis; in-game sounds
ENABLE_LTO=ON - Build with IPO/LTO optimizations (smaller and more efficient than regular build)
ENABLE_LTO=<varies> - Build with IPO/LTO optimizations (smaller and more efficient than regular build)
ENABLE_LUAJIT=ON - Build with LuaJIT (much faster than non-JIT Lua)
ENABLE_PROMETHEUS=OFF - Build with Prometheus metrics exporter (listens on tcp/30000 by default)
ENABLE_SYSTEM_GMP=ON - Use GMP from system (much faster than bundled mini-gmp)