1# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
2# file Copyright.txt or https://cmake.org/licensing for details.
3
4
5if(CMAKE_OBJC_COMPILER_FORCED)
6  # The compiler configuration was forced by the user.
7  # Assume the user has configured all compiler information.
8  set(CMAKE_OBJC_COMPILER_WORKS TRUE)
9  return()
10endif()
11
12include(CMakeTestCompilerCommon)
13
14# work around enforced code signing and / or missing executable target type
15set(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
16if(_CMAKE_FEATURE_DETECTION_TARGET_TYPE)
17  set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_CMAKE_FEATURE_DETECTION_TARGET_TYPE})
18endif()
19
20# Remove any cached result from an older CMake version.
21# We now store this in CMakeCCompiler.cmake.
22unset(CMAKE_OBJC_COMPILER_WORKS CACHE)
23
24# Try to identify the ABI and configure it into CMakeOBJCCompiler.cmake
25include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
26CMAKE_DETERMINE_COMPILER_ABI(OBJC ${CMAKE_ROOT}/Modules/CMakeOBJCCompilerABI.m)
27if(CMAKE_OBJC_ABI_COMPILED)
28  # The compiler worked so skip dedicated test below.
29  set(CMAKE_OBJC_COMPILER_WORKS TRUE)
30  message(STATUS "Check for working OBJC compiler: ${CMAKE_OBJC_COMPILER} - skipped")
31endif()
32
33# This file is used by EnableLanguage in cmGlobalGenerator to
34# determine that that 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.
38if(NOT CMAKE_OBJC_COMPILER_WORKS)
39  PrintTestCompilerStatus("OBJC")
40  __TestCompiler_setTryCompileTargetType()
41  file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testOBJCCompiler.m
42    "#ifdef __cplusplus\n"
43    "# error \"The CMAKE_OBJC_COMPILER is set to a C++ compiler\"\n"
44    "#endif\n"
45    "#ifndef __OBJC__\n"
46    "# error \"The CMAKE_OBJC_COMPILER is not an Objective-C compiler\"\n"
47    "#endif\n"
48    "int main(int argc, char* argv[])\n"
49    "{ (void)argv; return argc-1;}\n")
50  # Clear result from normal variable.
51  unset(CMAKE_OBJC_COMPILER_WORKS)
52  # Puts test result in cache variable.
53  try_compile(CMAKE_OBJC_COMPILER_WORKS ${CMAKE_BINARY_DIR}
54    ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testOBJCCompiler.m
55    OUTPUT_VARIABLE __CMAKE_OBJC_COMPILER_OUTPUT)
56  # Move result from cache to normal variable.
57  set(CMAKE_OBJC_COMPILER_WORKS ${CMAKE_OBJC_COMPILER_WORKS})
58  unset(CMAKE_OBJC_COMPILER_WORKS CACHE)
59  __TestCompiler_restoreTryCompileTargetType()
60  if(NOT CMAKE_OBJC_COMPILER_WORKS)
61    PrintTestCompilerResult(CHECK_FAIL "broken")
62    file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
63      "Determining if the Objective-C compiler works failed with "
64      "the following output:\n${__CMAKE_OBJC_COMPILER_OUTPUT}\n\n")
65    string(REPLACE "\n" "\n  " _output "${__CMAKE_OBJC_COMPILER_OUTPUT}")
66    message(FATAL_ERROR "The Objective-C compiler\n  \"${CMAKE_OBJC_COMPILER}\"\n"
67      "is not able to compile a simple test program.\nIt fails "
68      "with the following output:\n  ${_output}\n\n"
69      "CMake will not be able to correctly generate this project.")
70  endif()
71  PrintTestCompilerResult(CHECK_PASS "works")
72  file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
73    "Determining if the Objective-C compiler works passed with "
74    "the following output:\n${__CMAKE_OBJC_COMPILER_OUTPUT}\n\n")
75endif()
76
77# Try to identify the compiler features
78include(${CMAKE_ROOT}/Modules/CMakeDetermineCompileFeatures.cmake)
79CMAKE_DETERMINE_COMPILE_FEATURES(OBJC)
80
81# Re-configure to save learned information.
82configure_file(
83  ${CMAKE_ROOT}/Modules/CMakeOBJCCompiler.cmake.in
84  ${CMAKE_PLATFORM_INFO_DIR}/CMakeOBJCCompiler.cmake
85  @ONLY
86  )
87include(${CMAKE_PLATFORM_INFO_DIR}/CMakeOBJCCompiler.cmake)
88
89if(CMAKE_OBJC_SIZEOF_DATA_PTR)
90  foreach(f ${CMAKE_OBJC_ABI_FILES})
91    include(${f})
92  endforeach()
93  unset(CMAKE_OBJC_ABI_FILES)
94endif()
95
96set(CMAKE_TRY_COMPILE_TARGET_TYPE ${__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE})
97unset(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE)
98unset(__CMAKE_OBJC_COMPILER_OUTPUT)
99