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[CMake][compiler-rt] Support for using compiler-rt atomic library (#106603)

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Not every toolchain provides and want to use libatomic which is a part
of GCC, some toolchains may opt into using compiler-rt atomic library.
This commit is contained in:
Petr Hosek
2024-09-03 10:28:49 -07:00
committed by GitHub
parent 4640736616
commit 26a4edf655
5 changed files with 31 additions and 8 deletions
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16
cmake/Modules/HandleCompilerRT.cmake
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@@ -51,7 +51,7 @@ endfunction()
# This calls cache_compiler_rt_library that caches the path to speed up
# repeated invocations with the same `name` and `target`.
function(find_compiler_rt_library name variable)
cmake_parse_arguments(ARG "" "TARGET;FLAGS" "" ${ARGN})
cmake_parse_arguments(ARG "SHARED" "TARGET;FLAGS" "" ${ARGN})
# While we can use compiler-rt runtimes with other compilers, we need to
# query the compiler for runtime location and thus we require Clang.
if(NOT CMAKE_CXX_COMPILER_ID MATCHES Clang)
@@ -112,12 +112,16 @@ function(find_compiler_rt_library name variable)
# path and then checking if the resultant path exists. The result of
# this check is also cached by cache_compiler_rt_library.
set(library_file "${COMPILER_RT_LIBRARY_builtins_${target}}")
if(library_file MATCHES ".*clang_rt\.([a-z0-9_\-]+)\.(a|lib)")
set(from_name ${CMAKE_MATCH_0})
get_component_name(${name} to_name)
string(REPLACE "${from_name}" "${to_name}" library_file "${library_file}")
cache_compiler_rt_library(FALSE "${name}" "${target}" "${library_file}")
get_component_name("builtins" from_name)
get_component_name(${name} to_name)
get_filename_component(basename ${library_file} NAME)
string(REPLACE "${from_name}" "${to_name}" basename "${basename}")
if (ARG_SHARED)
string(REGEX REPLACE "\.(a|lib)$" ".so" basename "${basename}")
endif()
get_filename_component(dirname ${library_file} DIRECTORY)
set(library_file "${dirname}/${basename}")
cache_compiler_rt_library(FALSE "${name}" "${target}" "${library_file}")
endif()
set(${variable} "${COMPILER_RT_LIBRARY_${name}_${target}}" PARENT_SCOPE)
endfunction()