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LTO support proposal. (#573)

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* LTO support proposal.

* giving choice
This commit is contained in:
David CARLIER
2022-12-09 20:30:56 +00:00
committed by GitHub
parent dd3f4a9037
commit 5bb5701b45
1 changed files with 11 additions and 1 deletions
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12
CMakeLists.txt
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@@ -9,6 +9,7 @@ endif()
include(CheckCXXCompilerFlag)
include(CheckCXXSourceCompiles)
include(CheckIncludeFileCXX)
include(CheckIPOSupported)
include(CMakeDependentOption)
option(SNMALLOC_HEADER_ONLY_LIBRARY "Use snmalloc has a header-only library" OFF)
@@ -20,6 +21,7 @@ option(SNMALLOC_TRACING "Enable large quantities of debug output." OFF)
option(SNMALLOC_NO_REALLOCARRAY "Build without reallocarray exported" ON)
option(SNMALLOC_NO_REALLOCARR "Build without reallocarr exported" ON)
option(SNMALLOC_LINK_ICF "Link with Identical Code Folding" ON)
option(SNMALLOC_IPO "Link with IPO/LTO support" OFF)
# Options that apply only if we're not building the header-only library
cmake_dependent_option(SNMALLOC_RUST_SUPPORT "Build static library for rust" OFF "NOT SNMALLOC_HEADER_ONLY_LIBRARY" OFF)
cmake_dependent_option(SNMALLOC_STATIC_LIBRARY "Build static libraries" ON "NOT SNMALLOC_HEADER_ONLY_LIBRARY" OFF)
@@ -40,6 +42,7 @@ if (NOT SNMALLOC_HEADER_ONLY_LIBRARY)
set_property(CACHE SNMALLOC_CLEANUP PROPERTY STRINGS THREAD_CLEANUP PTHREAD_DESTRUCTORS CXX11_DESTRUCTORS)
set(SNMALLOC_STATIC_LIBRARY_PREFIX "sn_" CACHE STRING "Static library function prefix")
set(SNMALLOC_COMPILER_SUPPORT_IPO FALSE)
else ()
unset(SNMALLOC_STATIC_LIBRARY_PREFIX CACHE)
unset(SNMALLOC_CLEANUP CACHE)
@@ -202,6 +205,13 @@ if(SNMALLOC_COMPILER_SUPPORT_MCX16)
target_compile_options(snmalloc INTERFACE $<$<COMPILE_LANGUAGE:CXX>:-mcx16>)
endif()
if (NOT SNMALLOC_HEADER_ONLY_LIBRARY AND SNMALLOC_IPO)
check_ipo_supported(RESULT HAS_IPO)
if (HAS_IPO)
set(SNMALLOC_COMPILER_SUPPORT_IPO TRUE)
endif()
endif()
# Helper function that conditionally defines a macro for the build target if
# the CMake variable of the same name is set.
function(add_as_define FLAG)
@@ -293,7 +303,7 @@ if(NOT SNMALLOC_HEADER_ONLY_LIBRARY)
function(add_shim name type)
add_library(${name} ${type} ${ARGN})
target_link_libraries(${name} snmalloc)
set_target_properties(${name} PROPERTIES CXX_VISIBILITY_PRESET hidden)
set_target_properties(${name} PROPERTIES CXX_VISIBILITY_PRESET hidden INTERPROCEDURAL_OPTIMIZATION ${SNMALLOC_COMPILER_SUPPORT_IPO})
target_compile_definitions(${name} PRIVATE "SNMALLOC_USE_${SNMALLOC_CLEANUP}")
add_warning_flags(${name})