1*810390e3Srobertfunction(check_section_exists section output) 2*810390e3Srobert cmake_parse_arguments(ARG "" "" "SOURCE;FLAGS" ${ARGN}) 3*810390e3Srobert if(NOT ARG_SOURCE) 4*810390e3Srobert set(ARG_SOURCE "int main(void) { return 0; }\n") 5*810390e3Srobert endif() 6*810390e3Srobert 7*810390e3Srobert string(RANDOM TARGET_NAME) 8*810390e3Srobert set(TARGET_NAME "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cmTC_${TARGET_NAME}.dir") 9*810390e3Srobert file(MAKE_DIRECTORY ${TARGET_NAME}) 10*810390e3Srobert 11*810390e3Srobert file(WRITE "${TARGET_NAME}/CheckSectionExists.c" "${ARG_SOURCE}\n") 12*810390e3Srobert 13*810390e3Srobert string(REGEX MATCHALL "<[A-Za-z0-9_]*>" substitutions 14*810390e3Srobert ${CMAKE_C_COMPILE_OBJECT}) 15*810390e3Srobert 16*810390e3Srobert set(try_compile_flags "${ARG_FLAGS}") 17*810390e3Srobert if(CMAKE_C_COMPILER_ID MATCHES Clang AND CMAKE_C_COMPILER_TARGET) 18*810390e3Srobert list(APPEND try_compile_flags "-target ${CMAKE_C_COMPILER_TARGET}") 19*810390e3Srobert endif() 20*810390e3Srobert append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto try_compile_flags) 21*810390e3Srobert if(NOT COMPILER_RT_ENABLE_PGO) 22*810390e3Srobert if(LLVM_PROFDATA_FILE AND COMPILER_RT_HAS_FNO_PROFILE_INSTR_USE_FLAG) 23*810390e3Srobert list(APPEND try_compile_flags "-fno-profile-instr-use") 24*810390e3Srobert endif() 25*810390e3Srobert if(LLVM_BUILD_INSTRUMENTED MATCHES IR AND COMPILER_RT_HAS_FNO_PROFILE_GENERATE_FLAG) 26*810390e3Srobert list(APPEND try_compile_flags "-fno-profile-generate") 27*810390e3Srobert elseif((LLVM_BUILD_INSTRUMENTED OR LLVM_BUILD_INSTRUMENTED_COVERAGE) AND COMPILER_RT_HAS_FNO_PROFILE_INSTR_GENERATE_FLAG) 28*810390e3Srobert list(APPEND try_compile_flags "-fno-profile-instr-generate") 29*810390e3Srobert if(LLVM_BUILD_INSTRUMENTED_COVERAGE AND COMPILER_RT_HAS_FNO_COVERAGE_MAPPING_FLAG) 30*810390e3Srobert list(APPEND try_compile_flags "-fno-coverage-mapping") 31*810390e3Srobert endif() 32*810390e3Srobert endif() 33*810390e3Srobert endif() 34*810390e3Srobert 35*810390e3Srobert string(REPLACE ";" " " extra_flags "${try_compile_flags}") 36*810390e3Srobert 37*810390e3Srobert set(test_compile_command "${CMAKE_C_COMPILE_OBJECT}") 38*810390e3Srobert foreach(substitution ${substitutions}) 39*810390e3Srobert if(substitution STREQUAL "<CMAKE_C_COMPILER>") 40*810390e3Srobert string(REPLACE "<CMAKE_C_COMPILER>" "${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}" 41*810390e3Srobert test_compile_command ${test_compile_command}) 42*810390e3Srobert elseif(substitution STREQUAL "<OBJECT>") 43*810390e3Srobert string(REPLACE "<OBJECT>" "${TARGET_NAME}/CheckSectionExists.o" 44*810390e3Srobert test_compile_command ${test_compile_command}) 45*810390e3Srobert elseif(substitution STREQUAL "<SOURCE>") 46*810390e3Srobert string(REPLACE "<SOURCE>" "${TARGET_NAME}/CheckSectionExists.c" 47*810390e3Srobert test_compile_command ${test_compile_command}) 48*810390e3Srobert elseif(substitution STREQUAL "<FLAGS>") 49*810390e3Srobert string(REPLACE "<FLAGS>" "${CMAKE_C_FLAGS} ${extra_flags}" 50*810390e3Srobert test_compile_command ${test_compile_command}) 51*810390e3Srobert else() 52*810390e3Srobert string(REPLACE "${substitution}" "" test_compile_command 53*810390e3Srobert ${test_compile_command}) 54*810390e3Srobert endif() 55*810390e3Srobert endforeach() 56*810390e3Srobert 57*810390e3Srobert # Strip quotes from the compile command, as the compiler is not expecting 58*810390e3Srobert # quoted arguments (potential quotes added from D62063). 59*810390e3Srobert string(REPLACE "\"" "" test_compile_command "${test_compile_command}") 60*810390e3Srobert 61*810390e3Srobert string(REPLACE " " ";" test_compile_command "${test_compile_command}") 62*810390e3Srobert 63*810390e3Srobert execute_process( 64*810390e3Srobert COMMAND ${test_compile_command} 65*810390e3Srobert RESULT_VARIABLE TEST_RESULT 66*810390e3Srobert OUTPUT_VARIABLE TEST_OUTPUT 67*810390e3Srobert ERROR_VARIABLE TEST_ERROR 68*810390e3Srobert ) 69*810390e3Srobert 70*810390e3Srobert # Explicitly throw a fatal error message if test_compile_command fails. 71*810390e3Srobert if(TEST_RESULT) 72*810390e3Srobert message(FATAL_ERROR "${TEST_ERROR}") 73*810390e3Srobert return() 74*810390e3Srobert endif() 75*810390e3Srobert 76*810390e3Srobert execute_process( 77*810390e3Srobert COMMAND ${CMAKE_OBJDUMP} -h "${TARGET_NAME}/CheckSectionExists.o" 78*810390e3Srobert RESULT_VARIABLE CHECK_RESULT 79*810390e3Srobert OUTPUT_VARIABLE CHECK_OUTPUT 80*810390e3Srobert ERROR_VARIABLE CHECK_ERROR 81*810390e3Srobert ) 82*810390e3Srobert string(FIND "${CHECK_OUTPUT}" "${section}" SECTION_FOUND) 83*810390e3Srobert 84*810390e3Srobert if(NOT SECTION_FOUND EQUAL -1) 85*810390e3Srobert set(${output} TRUE PARENT_SCOPE) 86*810390e3Srobert else() 87*810390e3Srobert set(${output} FALSE PARENT_SCOPE) 88*810390e3Srobert endif() 89*810390e3Srobert 90*810390e3Srobert file(REMOVE_RECURSE ${TARGET_NAME}) 91*810390e3Srobertendfunction() 92