| add_compiler_rt_component(crt) |
| |
| function(check_cxx_section_exists section output) |
| cmake_parse_arguments(ARG "" "" "SOURCE;FLAGS" ${ARGN}) |
| if(NOT ARG_SOURCE) |
| set(ARG_SOURCE "int main() { return 0; }\n") |
| endif() |
| |
| string(RANDOM TARGET_NAME) |
| set(TARGET_NAME "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cmTC_${TARGET_NAME}.dir") |
| file(MAKE_DIRECTORY ${TARGET_NAME}) |
| |
| file(WRITE "${TARGET_NAME}/CheckSectionExists.c" "${ARG_SOURCE}\n") |
| |
| string(REGEX MATCHALL "<[A-Za-z0-9_]*>" substitutions |
| ${CMAKE_C_COMPILE_OBJECT}) |
| |
| set(try_compile_flags "${ARG_FLAGS}") |
| if(CMAKE_C_COMPILER_ID MATCHES Clang AND CMAKE_C_COMPILER_TARGET) |
| list(APPEND try_compile_flags "-target ${CMAKE_C_COMPILER_TARGET}") |
| endif() |
| append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto try_compile_flags) |
| |
| string(REPLACE ";" " " extra_flags "${try_compile_flags}") |
| |
| set(test_compile_command "${CMAKE_C_COMPILE_OBJECT}") |
| foreach(substitution ${substitutions}) |
| if(substitution STREQUAL "<CMAKE_C_COMPILER>") |
| string(REPLACE "<CMAKE_C_COMPILER>" "${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}" |
| test_compile_command ${test_compile_command}) |
| elseif(substitution STREQUAL "<OBJECT>") |
| string(REPLACE "<OBJECT>" "${TARGET_NAME}/CheckSectionExists.o" |
| test_compile_command ${test_compile_command}) |
| elseif(substitution STREQUAL "<SOURCE>") |
| string(REPLACE "<SOURCE>" "${TARGET_NAME}/CheckSectionExists.c" |
| test_compile_command ${test_compile_command}) |
| elseif(substitution STREQUAL "<FLAGS>") |
| string(REPLACE "<FLAGS>" "${CMAKE_C_FLAGS} ${extra_flags}" |
| test_compile_command ${test_compile_command}) |
| else() |
| string(REPLACE "${substitution}" "" test_compile_command |
| ${test_compile_command}) |
| endif() |
| endforeach() |
| |
| string(REPLACE " " ";" test_compile_command "${test_compile_command}") |
| |
| execute_process( |
| COMMAND ${test_compile_command} |
| RESULT_VARIABLE TEST_RESULT |
| OUTPUT_VARIABLE TEST_OUTPUT |
| ERROR_VARIABLE TEST_ERROR |
| ) |
| |
| execute_process( |
| COMMAND ${CMAKE_OBJDUMP} -h "${TARGET_NAME}/CheckSectionExists.o" |
| RESULT_VARIABLE CHECK_RESULT |
| OUTPUT_VARIABLE CHECK_OUTPUT |
| ERROR_VARIABLE CHECK_ERROR |
| ) |
| string(FIND "${CHECK_OUTPUT}" "${section}" SECTION_FOUND) |
| |
| if(NOT SECTION_FOUND EQUAL -1) |
| set(${output} TRUE PARENT_SCOPE) |
| else() |
| set(${output} FALSE PARENT_SCOPE) |
| endif() |
| |
| file(REMOVE_RECURSE ${TARGET_NAME}) |
| endfunction() |
| |
| check_cxx_section_exists(".init_array" COMPILER_RT_HAS_INITFINI_ARRAY |
| SOURCE "__attribute__((constructor)) void f() {}\nint main() { return 0; }\n") |
| |
| append_list_if(COMPILER_RT_HAS_STD_C11_FLAG -std=c11 CRT_CFLAGS) |
| append_list_if(COMPILER_RT_HAS_INITFINI_ARRAY -DCRT_HAS_INITFINI_ARRAY CRT_CFLAGS) |
| append_list_if(COMPILER_RT_HAS_FPIC_FLAG -fPIC CRT_CFLAGS) |
| append_list_if(COMPILER_RT_HAS_WNO_PEDANTIC -Wno-pedantic CRT_CFLAGS) |
| |
| foreach(arch ${CRT_SUPPORTED_ARCH}) |
| add_compiler_rt_runtime(clang_rt.crtbegin |
| OBJECT |
| ARCHS ${arch} |
| SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/crtbegin.c |
| CFLAGS ${CRT_CFLAGS} |
| PARENT_TARGET crt) |
| add_compiler_rt_runtime(clang_rt.crtend |
| OBJECT |
| ARCHS ${arch} |
| SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/crtend.c |
| CFLAGS ${CRT_CFLAGS} |
| PARENT_TARGET crt) |
| endforeach() |