function(check_section_exists section output) cmake_parse_arguments(ARG "" "" "SOURCE;FLAGS" ${ARGN}) if(NOT ARG_SOURCE) set(ARG_SOURCE "int main(void) { return 0; }\n") endif() string(RANDOM TARGET_NAME) set(TARGET_NAME "${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 ${CMAKE_C_COMPILER_TARGET}") endif() append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto try_compile_flags) if(NOT COMPILER_RT_ENABLE_PGO) if(LLVM_PROFDATA_FILE AND COMPILER_RT_HAS_FNO_PROFILE_INSTR_USE_FLAG) list(APPEND try_compile_flags "-fno-profile-instr-use") endif() if(LLVM_BUILD_INSTRUMENTED MATCHES IR AND COMPILER_RT_HAS_FNO_PROFILE_GENERATE_FLAG) list(APPEND try_compile_flags "-fno-profile-generate") elseif((LLVM_BUILD_INSTRUMENTED OR LLVM_BUILD_INSTRUMENTED_COVERAGE) AND COMPILER_RT_HAS_FNO_PROFILE_INSTR_GENERATE_FLAG) list(APPEND try_compile_flags "-fno-profile-instr-generate") if(LLVM_BUILD_INSTRUMENTED_COVERAGE AND COMPILER_RT_HAS_FNO_COVERAGE_MAPPING_FLAG) list(APPEND try_compile_flags "-fno-coverage-mapping") endif() endif() endif() string(REPLACE ";" " " extra_flags "${try_compile_flags}") set(test_compile_command "${CMAKE_C_COMPILE_OBJECT}") foreach(substitution ${substitutions}) if(substitution STREQUAL "") string(REPLACE "" "${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}" test_compile_command ${test_compile_command}) elseif(substitution STREQUAL "") string(REPLACE "" "${TARGET_NAME}/CheckSectionExists.o" test_compile_command ${test_compile_command}) elseif(substitution STREQUAL "") string(REPLACE "" "${TARGET_NAME}/CheckSectionExists.c" test_compile_command ${test_compile_command}) elseif(substitution STREQUAL "") string(REPLACE "" "${CMAKE_C_FLAGS} ${extra_flags}" test_compile_command ${test_compile_command}) else() string(REPLACE "${substitution}" "" test_compile_command ${test_compile_command}) endif() endforeach() # Strip quotes from the compile command, as the compiler is not expecting # quoted arguments (potential quotes added from D62063). string(REPLACE "\"" "" test_compile_command "${test_compile_command}") string(REPLACE " " ";" test_compile_command "${test_compile_command}") execute_process( COMMAND ${test_compile_command} RESULT_VARIABLE TEST_RESULT OUTPUT_VARIABLE TEST_OUTPUT ERROR_VARIABLE TEST_ERROR ) # Explicitly throw a fatal error message if test_compile_command fails. if(TEST_RESULT) message(FATAL_ERROR "${TEST_ERROR}") return() endif() 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()