xref: /openbsd-src/gnu/llvm/compiler-rt/cmake/Modules/BuiltinTests.cmake (revision 810390e339a5425391477d5d41c78d7cab2424ac)
13cab2bb3Spatrickinclude(CMakeCheckCompilerFlagCommonPatterns)
23cab2bb3Spatrick
33cab2bb3Spatrick# Test compiler can compile simple C/C++/Objective-C program without invoking
43cab2bb3Spatrick# the linker.
53cab2bb3Spatrick#
63cab2bb3Spatrick# try_compile_only(
73cab2bb3Spatrick#   OUTPUT_VAR
83cab2bb3Spatrick#   [SOURCE source_text]
93cab2bb3Spatrick#   [FLAGS flag_0 [ flag_1 ]]
103cab2bb3Spatrick# )
113cab2bb3Spatrick#
123cab2bb3Spatrick# OUTPUT_VAR - The variable name to store the result. The result is a boolean
133cab2bb3Spatrick#              `True` or `False`.
143cab2bb3Spatrick#
153cab2bb3Spatrick# SOURCE     - Optional. If specified use source the source text string
163cab2bb3Spatrick#              specified. If not specified source code will be used that is C,
173cab2bb3Spatrick#              C++, and Objective-C compatible.
183cab2bb3Spatrick#
193cab2bb3Spatrick# FLAGS      - Optional. If specified pass the one or more specified flags to
203cab2bb3Spatrick#              the compiler.
213cab2bb3Spatrick#
223cab2bb3Spatrick# EXAMPLES:
233cab2bb3Spatrick#
243cab2bb3Spatrick# try_compile_only(HAS_F_NO_RTTI FLAGS "-fno-rtti")
253cab2bb3Spatrick#
263cab2bb3Spatrick# try_compile_only(HAS_CXX_AUTO_TYPE_DECL
273cab2bb3Spatrick#   SOURCE "int foo(int x) { auto y = x + 1; return y;}"
283cab2bb3Spatrick#   FLAGS "-x" "c++" "-std=c++11" "-Werror=c++11-extensions"
293cab2bb3Spatrick# )
303cab2bb3Spatrick#
313cab2bb3Spatrickfunction(try_compile_only output)
323cab2bb3Spatrick  # NOTE: `SOURCE` needs to be a multi-argument because source code
333cab2bb3Spatrick  # often contains semicolons which happens to be CMake's list separator
343cab2bb3Spatrick  # which confuses `cmake_parse_arguments()`.
353cab2bb3Spatrick  cmake_parse_arguments(ARG "" "" "SOURCE;FLAGS" ${ARGN})
363cab2bb3Spatrick  if (ARG_UNPARSED_ARGUMENTS)
373cab2bb3Spatrick    message(FATAL_ERROR "Unexpected arguments \"${ARG_UNPARSED_ARGUMENTS}\"")
383cab2bb3Spatrick  endif()
393cab2bb3Spatrick  if(NOT ARG_SOURCE)
403cab2bb3Spatrick    set(ARG_SOURCE "int foo(int x, int y) { return x + y; }\n")
413cab2bb3Spatrick  endif()
423cab2bb3Spatrick  set(SIMPLE_C ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.c)
433cab2bb3Spatrick  file(WRITE ${SIMPLE_C} "${ARG_SOURCE}\n")
443cab2bb3Spatrick  string(REGEX MATCHALL "<[A-Za-z0-9_]*>" substitutions
453cab2bb3Spatrick         ${CMAKE_C_COMPILE_OBJECT})
463cab2bb3Spatrick
473cab2bb3Spatrick  set(TRY_COMPILE_FLAGS "${ARG_FLAGS}")
483cab2bb3Spatrick  if(CMAKE_C_COMPILER_ID MATCHES Clang AND CMAKE_C_COMPILER_TARGET)
49*810390e3Srobert    list(APPEND TRY_COMPILE_FLAGS "--target=${CMAKE_C_COMPILER_TARGET}")
503cab2bb3Spatrick  endif()
513cab2bb3Spatrick
523cab2bb3Spatrick  string(REPLACE ";" " " extra_flags "${TRY_COMPILE_FLAGS}")
533cab2bb3Spatrick
543cab2bb3Spatrick  set(test_compile_command "${CMAKE_C_COMPILE_OBJECT}")
553cab2bb3Spatrick  foreach(substitution ${substitutions})
563cab2bb3Spatrick    if(substitution STREQUAL "<CMAKE_C_COMPILER>")
573cab2bb3Spatrick      string(REPLACE "<CMAKE_C_COMPILER>"
583cab2bb3Spatrick             "${CMAKE_C_COMPILER}" test_compile_command ${test_compile_command})
593cab2bb3Spatrick    elseif(substitution STREQUAL "<OBJECT>")
603cab2bb3Spatrick      string(REPLACE "<OBJECT>"
613cab2bb3Spatrick             "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/test.o"
623cab2bb3Spatrick             test_compile_command ${test_compile_command})
633cab2bb3Spatrick    elseif(substitution STREQUAL "<SOURCE>")
643cab2bb3Spatrick      string(REPLACE "<SOURCE>" "${SIMPLE_C}" test_compile_command
653cab2bb3Spatrick             ${test_compile_command})
663cab2bb3Spatrick    elseif(substitution STREQUAL "<FLAGS>")
673cab2bb3Spatrick      string(REPLACE "<FLAGS>" "${CMAKE_C_FLAGS} ${extra_flags}"
683cab2bb3Spatrick             test_compile_command ${test_compile_command})
693cab2bb3Spatrick    else()
703cab2bb3Spatrick      string(REPLACE "${substitution}" "" test_compile_command
713cab2bb3Spatrick             ${test_compile_command})
723cab2bb3Spatrick    endif()
733cab2bb3Spatrick  endforeach()
743cab2bb3Spatrick
753cab2bb3Spatrick  # Strip quotes from the compile command, as the compiler is not expecting
763cab2bb3Spatrick  # quoted arguments (see discussion on D62063 for when this can come up). If
77*810390e3Srobert  # the quotes were there for arguments with spaces in them, the quotes were
783cab2bb3Spatrick  # not going to help since the string gets split on spaces below.
793cab2bb3Spatrick  string(REPLACE "\"" "" test_compile_command "${test_compile_command}")
803cab2bb3Spatrick
813cab2bb3Spatrick  string(REPLACE " " ";" test_compile_command "${test_compile_command}")
823cab2bb3Spatrick
833cab2bb3Spatrick  execute_process(
843cab2bb3Spatrick    COMMAND ${test_compile_command}
853cab2bb3Spatrick    RESULT_VARIABLE result
863cab2bb3Spatrick    OUTPUT_VARIABLE TEST_OUTPUT
873cab2bb3Spatrick    ERROR_VARIABLE TEST_ERROR
883cab2bb3Spatrick  )
893cab2bb3Spatrick
903cab2bb3Spatrick  CHECK_COMPILER_FLAG_COMMON_PATTERNS(_CheckCCompilerFlag_COMMON_PATTERNS)
913cab2bb3Spatrick  set(ERRORS_FOUND OFF)
923cab2bb3Spatrick  foreach(var ${_CheckCCompilerFlag_COMMON_PATTERNS})
933cab2bb3Spatrick    if("${var}" STREQUAL "FAIL_REGEX")
943cab2bb3Spatrick      continue()
953cab2bb3Spatrick    endif()
963cab2bb3Spatrick    if("${TEST_ERROR}" MATCHES "${var}" OR "${TEST_OUTPUT}" MATCHES "${var}")
973cab2bb3Spatrick      set(ERRORS_FOUND ON)
983cab2bb3Spatrick    endif()
993cab2bb3Spatrick  endforeach()
1003cab2bb3Spatrick
1013cab2bb3Spatrick  if(result EQUAL 0 AND NOT ERRORS_FOUND)
1023cab2bb3Spatrick    set(${output} True PARENT_SCOPE)
1033cab2bb3Spatrick  else()
1043cab2bb3Spatrick    file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
1053cab2bb3Spatrick        "Testing compiler for supporting " ${ARGN} ":\n"
1063cab2bb3Spatrick        "Command: ${test_compile_command}\n"
1073cab2bb3Spatrick        "${TEST_OUTPUT}\n${TEST_ERROR}\n${result}\n")
1083cab2bb3Spatrick    set(${output} False PARENT_SCOPE)
1093cab2bb3Spatrick  endif()
1103cab2bb3Spatrickendfunction()
1113cab2bb3Spatrick
1123cab2bb3Spatrickfunction(builtin_check_c_compiler_flag flag output)
1133cab2bb3Spatrick  if(NOT DEFINED ${output})
1143cab2bb3Spatrick    message(STATUS "Performing Test ${output}")
1153cab2bb3Spatrick    try_compile_only(result FLAGS ${flag})
1163cab2bb3Spatrick    set(${output} ${result} CACHE INTERNAL "Compiler supports ${flag}")
1173cab2bb3Spatrick    if(${result})
1183cab2bb3Spatrick      message(STATUS "Performing Test ${output} - Success")
1193cab2bb3Spatrick    else()
1203cab2bb3Spatrick      message(STATUS "Performing Test ${output} - Failed")
1213cab2bb3Spatrick    endif()
1223cab2bb3Spatrick  endif()
1233cab2bb3Spatrickendfunction()
1243cab2bb3Spatrick
1253cab2bb3Spatrickfunction(builtin_check_c_compiler_source output source)
1263cab2bb3Spatrick  if(NOT DEFINED ${output})
1273cab2bb3Spatrick    message(STATUS "Performing Test ${output}")
1283cab2bb3Spatrick    try_compile_only(result SOURCE ${source})
1293cab2bb3Spatrick    set(${output} ${result} CACHE INTERNAL "Compiler supports ${flag}")
1303cab2bb3Spatrick    if(${result})
1313cab2bb3Spatrick      message(STATUS "Performing Test ${output} - Success")
1323cab2bb3Spatrick    else()
1333cab2bb3Spatrick      message(STATUS "Performing Test ${output} - Failed")
1343cab2bb3Spatrick    endif()
1353cab2bb3Spatrick  endif()
1363cab2bb3Spatrickendfunction()
137