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