1 # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
2 # file Copyright.txt or https://cmake.org/licensing for details.
5 if(CMAKE_OBJCXX_COMPILER_FORCED)
6 # The compiler configuration was forced by the user.
7 # Assume the user has configured all compiler information.
8 set(CMAKE_OBJCXX_COMPILER_WORKS TRUE)
12 include(CMakeTestCompilerCommon)
14 # work around enforced code signing and / or missing executable target type
15 set(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
16 if(_CMAKE_FEATURE_DETECTION_TARGET_TYPE)
17 set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_CMAKE_FEATURE_DETECTION_TARGET_TYPE})
20 # Remove any cached result from an older CMake version.
21 # We now store this in CMakeOBJCXXCompiler.cmake.
22 unset(CMAKE_OBJCXX_COMPILER_WORKS CACHE)
24 # Try to identify the ABI and configure it into CMakeOBJCXXCompiler.cmake
25 include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
26 CMAKE_DETERMINE_COMPILER_ABI(OBJCXX ${CMAKE_ROOT}/Modules/CMakeOBJCXXCompilerABI.mm)
27 if(CMAKE_OBJCXX_ABI_COMPILED)
28 # The compiler worked so skip dedicated test below.
29 set(CMAKE_OBJCXX_COMPILER_WORKS TRUE)
30 message(STATUS "Check for working OBJCXX compiler: ${CMAKE_OBJCXX_COMPILER} - skipped")
33 # This file is used by EnableLanguage in cmGlobalGenerator to
34 # determine that the selected Objective-C++ compiler can actually compile
35 # and link the most basic of programs. If not, a fatal error
36 # is set and cmake stops processing commands and will not generate
37 # any makefiles or projects.
38 if(NOT CMAKE_OBJCXX_COMPILER_WORKS)
39 PrintTestCompilerStatus("OBJCXX")
40 __TestCompiler_setTryCompileTargetType()
41 string(CONCAT __TestCompiler_testObjCXXCompilerSource
42 "#ifndef __cplusplus\n"
43 "# error \"The CMAKE_OBJCXX_COMPILER is set to a C compiler\"\n"
46 "# error \"The CMAKE_OBJCXX_COMPILER is not an Objective-C++ compiler\"\n"
48 "int main(){return 0;}\n")
49 # Clear result from normal variable.
50 unset(CMAKE_OBJCXX_COMPILER_WORKS)
51 # Puts test result in cache variable.
52 try_compile(CMAKE_OBJCXX_COMPILER_WORKS
53 SOURCE_FROM_VAR testObjCXXCompiler.mm __TestCompiler_testObjCXXCompilerSource
54 OUTPUT_VARIABLE __CMAKE_OBJCXX_COMPILER_OUTPUT)
55 unset(__TestCompiler_testObjCXXCompilerSource)
56 # Move result from cache to normal variable.
57 set(CMAKE_OBJCXX_COMPILER_WORKS ${CMAKE_OBJCXX_COMPILER_WORKS})
58 unset(CMAKE_OBJCXX_COMPILER_WORKS CACHE)
59 __TestCompiler_restoreTryCompileTargetType()
60 if(NOT CMAKE_OBJCXX_COMPILER_WORKS)
61 PrintTestCompilerResult(CHECK_FAIL "broken")
62 string(REPLACE "\n" "\n " _output "${__CMAKE_OBJCXX_COMPILER_OUTPUT}")
63 message(FATAL_ERROR "The Objective-C++ compiler\n \"${CMAKE_OBJCXX_COMPILER}\"\n"
64 "is not able to compile a simple test program.\nIt fails "
65 "with the following output:\n ${_output}\n\n"
66 "CMake will not be able to correctly generate this project.")
68 PrintTestCompilerResult(CHECK_PASS "works")
71 # Try to identify the compiler features
72 include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerSupport.cmake)
73 CMAKE_DETERMINE_COMPILER_SUPPORT(OBJCXX)
75 # Re-configure to save learned information.
77 ${CMAKE_ROOT}/Modules/CMakeOBJCXXCompiler.cmake.in
78 ${CMAKE_PLATFORM_INFO_DIR}/CMakeOBJCXXCompiler.cmake
81 include(${CMAKE_PLATFORM_INFO_DIR}/CMakeOBJCXXCompiler.cmake)
83 if(CMAKE_OBJCXX_SIZEOF_DATA_PTR)
84 foreach(f ${CMAKE_OBJCXX_ABI_FILES})
87 unset(CMAKE_OBJCXX_ABI_FILES)
90 set(CMAKE_TRY_COMPILE_TARGET_TYPE ${__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE})
91 unset(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE)
92 unset(__CMAKE_OBJCXX_COMPILER_OUTPUT)