| # Check if the compiler-rt library file path exists. |
| # If found, cache the path in: |
| # COMPILER_RT_LIBRARY-<name>-<target> |
| # If err_flag is true OR path not found, emit a message and set: |
| # COMPILER_RT_LIBRARY-<name>-<target> to NOTFOUND |
| function(cache_compiler_rt_library err_flag name target library_file) |
| if(err_flag OR NOT EXISTS "${library_file}") |
| message(STATUS "Failed to find compiler-rt ${name} library for ${target}") |
| set(COMPILER_RT_LIBRARY_${name}_${target} "NOTFOUND" CACHE INTERNAL |
| "compiler-rt ${name} library for ${target}") |
| else() |
| message(STATUS "Found compiler-rt ${name} library: ${library_file}") |
| set(COMPILER_RT_LIBRARY_${name}_${target} "${library_file}" CACHE INTERNAL |
| "compiler-rt ${name} library for ${target}") |
| endif() |
| endfunction() |
| |
| function(get_component_name name variable) |
| if(APPLE) |
| if(NOT name MATCHES "builtins.*") |
| set(component_name "${name}_") |
| endif() |
| if (CMAKE_OSX_SYSROOT MATCHES ".+MacOSX.+") |
| set(component_name "${component_name}osx") |
| |
| elseif (CMAKE_OSX_SYSROOT MATCHES ".+iPhoneOS.+") |
| set(component_name "${component_name}ios") |
| elseif (CMAKE_OSX_SYSROOT MATCHES ".+iPhoneSimulator.+") |
| set(component_name "${component_name}iossim") |
| |
| elseif (CMAKE_OSX_SYSROOT MATCHES ".+AppleTVOS.+") |
| set(component_name "${component_name}tvos") |
| elseif (CMAKE_OSX_SYSROOT MATCHES ".+AppleTVSimulator.+") |
| set(component_name "${component_name}tvossim") |
| |
| elseif (CMAKE_OSX_SYSROOT MATCHES ".+WatchOS.+") |
| set(component_name "${component_name}watchos") |
| elseif (CMAKE_OSX_SYSROOT MATCHES ".+WatchSimulator.+") |
| set(component_name "${component_name}watchossim") |
| else() |
| message(WARNING "Unknown Apple SDK ${CMAKE_OSX_SYSROOT}, we don't know which compiler-rt library suffix to use.") |
| endif() |
| else() |
| set(component_name "${name}") |
| endif() |
| set(${variable} "${component_name}" PARENT_SCOPE) |
| endfunction() |
| |
| # Find the path to compiler-rt library `name` (e.g. "builtins") for the |
| # specified `TARGET` (e.g. "x86_64-linux-gnu") and return it in `variable`. |
| # 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 "SHARED" "TARGET;FLAGS" "" ${ARGN}) |
| # While we can use compiler-rt runtimes with other compilers, we need to |
| # query the compiler for runtime location and thus we require Clang. |
| if(NOT CMAKE_CXX_COMPILER_ID MATCHES Clang) |
| set(${variable} "NOTFOUND" PARENT_SCOPE) |
| return() |
| endif() |
| set(target "${ARG_TARGET}") |
| if(NOT target AND CMAKE_CXX_COMPILER_TARGET) |
| set(target "${CMAKE_CXX_COMPILER_TARGET}") |
| endif() |
| if(NOT DEFINED COMPILER_RT_LIBRARY_builtins_${target}) |
| # If the cache variable is not defined, invoke Clang and then |
| # set it with cache_compiler_rt_library. |
| set(clang_command ${CMAKE_CXX_COMPILER} "${ARG_FLAGS}") |
| if(target) |
| list(APPEND clang_command "--target=${target}") |
| endif() |
| get_property(cxx_flags CACHE CMAKE_CXX_FLAGS PROPERTY VALUE) |
| string(REPLACE " " ";" cxx_flags "${cxx_flags}") |
| list(APPEND clang_command ${cxx_flags}) |
| set(cmd_prefix "") |
| if(MSVC AND ${CMAKE_CXX_COMPILER_ID} MATCHES "Clang") |
| set(cmd_prefix "/clang:") |
| endif() |
| execute_process( |
| COMMAND ${clang_command} "${cmd_prefix}--rtlib=compiler-rt" "${cmd_prefix}-print-libgcc-file-name" |
| RESULT_VARIABLE had_error |
| OUTPUT_VARIABLE library_file |
| ) |
| string(STRIP "${library_file}" library_file) |
| file(TO_CMAKE_PATH "${library_file}" library_file) |
| get_filename_component(dirname ${library_file} DIRECTORY) |
| if(APPLE) |
| execute_process( |
| COMMAND ${clang_command} "--print-resource-dir" |
| RESULT_VARIABLE had_error |
| OUTPUT_VARIABLE resource_dir |
| ) |
| string(STRIP "${resource_dir}" resource_dir) |
| set(dirname "${resource_dir}/lib/darwin") |
| endif() |
| get_filename_component(basename ${library_file} NAME) |
| if(basename MATCHES ".*clang_rt\.([a-z0-9_\-]+)\.(a|lib)") |
| set(from_name ${CMAKE_MATCH_1}) |
| get_component_name(${CMAKE_MATCH_1} to_name) |
| string(REPLACE "${from_name}" "${to_name}" basename "${basename}") |
| set(library_file "${dirname}/${basename}") |
| cache_compiler_rt_library(${had_error} builtins "${target}" "${library_file}") |
| endif() |
| endif() |
| if(NOT COMPILER_RT_LIBRARY_builtins_${target}) |
| set(${variable} "NOTFOUND" PARENT_SCOPE) |
| return() |
| endif() |
| if(NOT DEFINED COMPILER_RT_LIBRARY_${name}_${target}) |
| # Clang gives only the builtins library path. Other library paths are |
| # obtained by substituting "builtins" with ${name} in the builtins |
| # path and then checking if the resultant path exists. The result of |
| # this check is also cached by cache_compiler_rt_library. |
| set(library_file "${COMPILER_RT_LIBRARY_builtins_${target}}") |
| get_component_name("builtins" from_name) |
| get_component_name(${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() |