| # Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| # file Copyright.txt or https://cmake.org/licensing for details. |
| |
| #.rst: |
| # WriteCompilerDetectionHeader |
| # ---------------------------- |
| # |
| # This module provides the function write_compiler_detection_header(). |
| # |
| # The ``WRITE_COMPILER_DETECTION_HEADER`` function can be used to generate |
| # a file suitable for preprocessor inclusion which contains macros to be |
| # used in source code:: |
| # |
| # write_compiler_detection_header( |
| # FILE <file> |
| # PREFIX <prefix> |
| # [OUTPUT_FILES_VAR <output_files_var> OUTPUT_DIR <output_dir>] |
| # COMPILERS <compiler> [...] |
| # FEATURES <feature> [...] |
| # [VERSION <version>] |
| # [PROLOG <prolog>] |
| # [EPILOG <epilog>] |
| # [ALLOW_UNKNOWN_COMPILERS] |
| # [ALLOW_UNKNOWN_COMPILER_VERSIONS] |
| # ) |
| # |
| # The ``write_compiler_detection_header`` function generates the |
| # file ``<file>`` with macros which all have the prefix ``<prefix>``. |
| # |
| # By default, all content is written directly to the ``<file>``. The |
| # ``OUTPUT_FILES_VAR`` may be specified to cause the compiler-specific |
| # content to be written to separate files. The separate files are then |
| # available in the ``<output_files_var>`` and may be consumed by the caller |
| # for installation for example. The ``OUTPUT_DIR`` specifies a relative |
| # path from the main ``<file>`` to the compiler-specific files. For example: |
| # |
| # .. code-block:: cmake |
| # |
| # write_compiler_detection_header( |
| # FILE climbingstats_compiler_detection.h |
| # PREFIX ClimbingStats |
| # OUTPUT_FILES_VAR support_files |
| # OUTPUT_DIR compilers |
| # COMPILERS GNU Clang MSVC Intel |
| # FEATURES cxx_variadic_templates |
| # ) |
| # install(FILES |
| # ${CMAKE_CURRENT_BINARY_DIR}/climbingstats_compiler_detection.h |
| # DESTINATION include |
| # ) |
| # install(FILES |
| # ${support_files} |
| # DESTINATION include/compilers |
| # ) |
| # |
| # |
| # ``VERSION`` may be used to specify the API version to be generated. |
| # Future versions of CMake may introduce alternative APIs. A given |
| # API is selected by any ``<version>`` value greater than or equal |
| # to the version of CMake that introduced the given API and less |
| # than the version of CMake that introduced its succeeding API. |
| # The value of the :variable:`CMAKE_MINIMUM_REQUIRED_VERSION` |
| # variable is used if no explicit version is specified. |
| # (As of CMake version |release| there is only one API version.) |
| # |
| # ``PROLOG`` may be specified as text content to write at the start of the |
| # header. ``EPILOG`` may be specified as text content to write at the end |
| # of the header |
| # |
| # At least one ``<compiler>`` and one ``<feature>`` must be listed. Compilers |
| # which are known to CMake, but not specified are detected and a preprocessor |
| # ``#error`` is generated for them. A preprocessor macro matching |
| # ``<PREFIX>_COMPILER_IS_<compiler>`` is generated for each compiler |
| # known to CMake to contain the value ``0`` or ``1``. |
| # |
| # Possible compiler identifiers are documented with the |
| # :variable:`CMAKE_<LANG>_COMPILER_ID` variable. |
| # Available features in this version of CMake are listed in the |
| # :prop_gbl:`CMAKE_C_KNOWN_FEATURES` and |
| # :prop_gbl:`CMAKE_CXX_KNOWN_FEATURES` global properties. |
| # The ``{c,cxx}_std_*`` meta-features are ignored if requested. |
| # |
| # See the :manual:`cmake-compile-features(7)` manual for information on |
| # compile features. |
| # |
| # ``ALLOW_UNKNOWN_COMPILERS`` and ``ALLOW_UNKNOWN_COMPILER_VERSIONS`` cause |
| # the module to generate conditions that treat unknown compilers as simply |
| # lacking all features. Without these options the default behavior is to |
| # generate a ``#error`` for unknown compilers. |
| # |
| # Feature Test Macros |
| # =================== |
| # |
| # For each compiler, a preprocessor macro is generated matching |
| # ``<PREFIX>_COMPILER_IS_<compiler>`` which has the content either ``0`` |
| # or ``1``, depending on the compiler in use. Preprocessor macros for |
| # compiler version components are generated matching |
| # ``<PREFIX>_COMPILER_VERSION_MAJOR`` ``<PREFIX>_COMPILER_VERSION_MINOR`` |
| # and ``<PREFIX>_COMPILER_VERSION_PATCH`` containing decimal values |
| # for the corresponding compiler version components, if defined. |
| # |
| # A preprocessor test is generated based on the compiler version |
| # denoting whether each feature is enabled. A preprocessor macro |
| # matching ``<PREFIX>_COMPILER_<FEATURE>``, where ``<FEATURE>`` is the |
| # upper-case ``<feature>`` name, is generated to contain the value |
| # ``0`` or ``1`` depending on whether the compiler in use supports the |
| # feature: |
| # |
| # .. code-block:: cmake |
| # |
| # write_compiler_detection_header( |
| # FILE climbingstats_compiler_detection.h |
| # PREFIX ClimbingStats |
| # COMPILERS GNU Clang AppleClang MSVC Intel |
| # FEATURES cxx_variadic_templates |
| # ) |
| # |
| # .. code-block:: c++ |
| # |
| # #if ClimbingStats_COMPILER_CXX_VARIADIC_TEMPLATES |
| # template<typename... T> |
| # void someInterface(T t...) { /* ... */ } |
| # #else |
| # // Compatibility versions |
| # template<typename T1> |
| # void someInterface(T1 t1) { /* ... */ } |
| # template<typename T1, typename T2> |
| # void someInterface(T1 t1, T2 t2) { /* ... */ } |
| # template<typename T1, typename T2, typename T3> |
| # void someInterface(T1 t1, T2 t2, T3 t3) { /* ... */ } |
| # #endif |
| # |
| # Symbol Macros |
| # ============= |
| # |
| # Some additional symbol-defines are created for particular features for |
| # use as symbols which may be conditionally defined empty: |
| # |
| # .. code-block:: c++ |
| # |
| # class MyClass ClimbingStats_FINAL |
| # { |
| # ClimbingStats_CONSTEXPR int someInterface() { return 42; } |
| # }; |
| # |
| # The ``ClimbingStats_FINAL`` macro will expand to ``final`` if the |
| # compiler (and its flags) support the ``cxx_final`` feature, and the |
| # ``ClimbingStats_CONSTEXPR`` macro will expand to ``constexpr`` |
| # if ``cxx_constexpr`` is supported. |
| # |
| # The following features generate corresponding symbol defines: |
| # |
| # ========================== =================================== ================= |
| # Feature Define Symbol |
| # ========================== =================================== ================= |
| # ``c_restrict`` ``<PREFIX>_RESTRICT`` ``restrict`` |
| # ``cxx_constexpr`` ``<PREFIX>_CONSTEXPR`` ``constexpr`` |
| # ``cxx_deleted_functions`` ``<PREFIX>_DELETED_FUNCTION`` ``= delete`` |
| # ``cxx_extern_templates`` ``<PREFIX>_EXTERN_TEMPLATE`` ``extern`` |
| # ``cxx_final`` ``<PREFIX>_FINAL`` ``final`` |
| # ``cxx_noexcept`` ``<PREFIX>_NOEXCEPT`` ``noexcept`` |
| # ``cxx_noexcept`` ``<PREFIX>_NOEXCEPT_EXPR(X)`` ``noexcept(X)`` |
| # ``cxx_override`` ``<PREFIX>_OVERRIDE`` ``override`` |
| # ========================== =================================== ================= |
| # |
| # Compatibility Implementation Macros |
| # =================================== |
| # |
| # Some features are suitable for wrapping in a macro with a backward |
| # compatibility implementation if the compiler does not support the feature. |
| # |
| # When the ``cxx_static_assert`` feature is not provided by the compiler, |
| # a compatibility implementation is available via the |
| # ``<PREFIX>_STATIC_ASSERT(COND)`` and |
| # ``<PREFIX>_STATIC_ASSERT_MSG(COND, MSG)`` function-like macros. The macros |
| # expand to ``static_assert`` where that compiler feature is available, and |
| # to a compatibility implementation otherwise. In the first form, the |
| # condition is stringified in the message field of ``static_assert``. In |
| # the second form, the message ``MSG`` is passed to the message field of |
| # ``static_assert``, or ignored if using the backward compatibility |
| # implementation. |
| # |
| # The ``cxx_attribute_deprecated`` feature provides a macro definition |
| # ``<PREFIX>_DEPRECATED``, which expands to either the standard |
| # ``[[deprecated]]`` attribute or a compiler-specific decorator such |
| # as ``__attribute__((__deprecated__))`` used by GNU compilers. |
| # |
| # The ``cxx_alignas`` feature provides a macro definition |
| # ``<PREFIX>_ALIGNAS`` which expands to either the standard ``alignas`` |
| # decorator or a compiler-specific decorator such as |
| # ``__attribute__ ((__aligned__))`` used by GNU compilers. |
| # |
| # The ``cxx_alignof`` feature provides a macro definition |
| # ``<PREFIX>_ALIGNOF`` which expands to either the standard ``alignof`` |
| # decorator or a compiler-specific decorator such as ``__alignof__`` |
| # used by GNU compilers. |
| # |
| # ============================= ================================ ===================== |
| # Feature Define Symbol |
| # ============================= ================================ ===================== |
| # ``cxx_alignas`` ``<PREFIX>_ALIGNAS`` ``alignas`` |
| # ``cxx_alignof`` ``<PREFIX>_ALIGNOF`` ``alignof`` |
| # ``cxx_nullptr`` ``<PREFIX>_NULLPTR`` ``nullptr`` |
| # ``cxx_static_assert`` ``<PREFIX>_STATIC_ASSERT`` ``static_assert`` |
| # ``cxx_static_assert`` ``<PREFIX>_STATIC_ASSERT_MSG`` ``static_assert`` |
| # ``cxx_attribute_deprecated`` ``<PREFIX>_DEPRECATED`` ``[[deprecated]]`` |
| # ``cxx_attribute_deprecated`` ``<PREFIX>_DEPRECATED_MSG`` ``[[deprecated]]`` |
| # ``cxx_thread_local`` ``<PREFIX>_THREAD_LOCAL`` ``thread_local`` |
| # ============================= ================================ ===================== |
| # |
| # A use-case which arises with such deprecation macros is the deprecation |
| # of an entire library. In that case, all public API in the library may |
| # be decorated with the ``<PREFIX>_DEPRECATED`` macro. This results in |
| # very noisy build output when building the library itself, so the macro |
| # may be may be defined to empty in that case when building the deprecated |
| # library: |
| # |
| # .. code-block:: cmake |
| # |
| # add_library(compat_support ${srcs}) |
| # target_compile_definitions(compat_support |
| # PRIVATE |
| # CompatSupport_DEPRECATED= |
| # ) |
| |
| include(${CMAKE_CURRENT_LIST_DIR}/CMakeCompilerIdDetection.cmake) |
| |
| function(_load_compiler_variables CompilerId lang) |
| include("${CMAKE_ROOT}/Modules/Compiler/${CompilerId}-${lang}-FeatureTests.cmake" OPTIONAL) |
| set(_cmake_oldestSupported_${CompilerId} ${_cmake_oldestSupported} PARENT_SCOPE) |
| foreach(feature ${ARGN}) |
| set(_cmake_feature_test_${CompilerId}_${feature} ${_cmake_feature_test_${feature}} PARENT_SCOPE) |
| endforeach() |
| include("${CMAKE_ROOT}/Modules/Compiler/${CompilerId}-${lang}-DetermineCompiler.cmake" OPTIONAL |
| RESULT_VARIABLE determinedCompiler) |
| if (NOT determinedCompiler) |
| include("${CMAKE_ROOT}/Modules/Compiler/${CompilerId}-DetermineCompiler.cmake" OPTIONAL) |
| endif() |
| set(_compiler_id_version_compute_${CompilerId} ${_compiler_id_version_compute} PARENT_SCOPE) |
| endfunction() |
| |
| macro(_simpledefine FEATURE_NAME FEATURE_TESTNAME FEATURE_STRING FEATURE_DEFAULT_STRING) |
| if (feature STREQUAL "${FEATURE_NAME}") |
| set(def_value "${prefix_arg}_${FEATURE_TESTNAME}") |
| string(APPEND file_content " |
| # if defined(${def_name}) && ${def_name} |
| # define ${def_value} ${FEATURE_STRING} |
| # else |
| # define ${def_value} ${FEATURE_DEFAULT_STRING} |
| # endif |
| \n") |
| endif() |
| endmacro() |
| |
| function(write_compiler_detection_header |
| file_keyword file_arg |
| prefix_keyword prefix_arg |
| ) |
| if (NOT "x${file_keyword}" STREQUAL "xFILE") |
| message(FATAL_ERROR "write_compiler_detection_header: FILE parameter missing.") |
| endif() |
| if (NOT "x${prefix_keyword}" STREQUAL "xPREFIX") |
| message(FATAL_ERROR "write_compiler_detection_header: PREFIX parameter missing.") |
| endif() |
| set(options ALLOW_UNKNOWN_COMPILERS ALLOW_UNKNOWN_COMPILER_VERSIONS) |
| set(oneValueArgs VERSION EPILOG PROLOG OUTPUT_FILES_VAR OUTPUT_DIR) |
| set(multiValueArgs COMPILERS FEATURES) |
| cmake_parse_arguments(_WCD "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN}) |
| |
| if (NOT _WCD_COMPILERS) |
| message(FATAL_ERROR "Invalid arguments. write_compiler_detection_header requires at least one compiler.") |
| endif() |
| if (NOT _WCD_FEATURES) |
| message(FATAL_ERROR "Invalid arguments. write_compiler_detection_header requires at least one feature.") |
| endif() |
| |
| if(_WCD_UNPARSED_ARGUMENTS) |
| message(FATAL_ERROR "Unparsed arguments: ${_WCD_UNPARSED_ARGUMENTS}") |
| endif() |
| |
| if (prefix_arg STREQUAL "") |
| message(FATAL_ERROR "A prefix must be specified") |
| endif() |
| string(MAKE_C_IDENTIFIER ${prefix_arg} cleaned_prefix) |
| if (NOT prefix_arg STREQUAL cleaned_prefix) |
| message(FATAL_ERROR "The prefix must be a valid C identifier.") |
| endif() |
| |
| if(NOT _WCD_VERSION) |
| set(_WCD_VERSION ${CMAKE_MINIMUM_REQUIRED_VERSION}) |
| endif() |
| set(_min_version 3.1.0) # Version which introduced this function |
| if (_WCD_VERSION VERSION_LESS _min_version) |
| set(err "VERSION compatibility for write_compiler_detection_header is set to ${_WCD_VERSION}, which is too low.") |
| string(APPEND err " It must be set to at least ${_min_version}. ") |
| string(APPEND err " Either set the VERSION parameter to the write_compiler_detection_header function, or update") |
| string(APPEND err " your minimum required CMake version with the cmake_minimum_required command.") |
| message(FATAL_ERROR "${err}") |
| endif() |
| |
| if(_WCD_OUTPUT_FILES_VAR) |
| if(NOT _WCD_OUTPUT_DIR) |
| message(FATAL_ERROR "If OUTPUT_FILES_VAR is specified, then OUTPUT_DIR must also be specified.") |
| endif() |
| endif() |
| if(_WCD_OUTPUT_DIR) |
| if(NOT _WCD_OUTPUT_FILES_VAR) |
| message(FATAL_ERROR "If OUTPUT_DIR is specified, then OUTPUT_FILES_VAR must also be specified.") |
| endif() |
| get_filename_component(main_file_dir ${file_arg} DIRECTORY) |
| if (NOT IS_ABSOLUTE ${main_file_dir}) |
| set(main_file_dir "${CMAKE_CURRENT_BINARY_DIR}/${main_file_dir}") |
| endif() |
| if (NOT IS_ABSOLUTE ${_WCD_OUTPUT_DIR}) |
| set(_WCD_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/${_WCD_OUTPUT_DIR}") |
| endif() |
| get_filename_component(out_file_dir ${_WCD_OUTPUT_DIR} ABSOLUTE) |
| string(FIND ${out_file_dir} ${main_file_dir} idx) |
| if (NOT idx EQUAL 0) |
| message(FATAL_ERROR "The compiler-specific output directory must be within the same directory as the main file.") |
| endif() |
| |
| if (main_file_dir STREQUAL out_file_dir) |
| unset(_WCD_OUTPUT_DIR) |
| else() |
| string(REPLACE "${main_file_dir}/" "" _WCD_OUTPUT_DIR "${out_file_dir}/") |
| endif() |
| endif() |
| |
| set(compilers |
| GNU |
| Clang |
| AppleClang |
| MSVC |
| SunPro |
| Intel |
| ) |
| |
| set(_hex_compilers ADSP Borland Embarcadero SunPro) |
| |
| foreach(_comp ${_WCD_COMPILERS}) |
| list(FIND compilers ${_comp} idx) |
| if (idx EQUAL -1) |
| message(FATAL_ERROR "Unsupported compiler ${_comp}.") |
| endif() |
| if (NOT _need_hex_conversion) |
| list(FIND _hex_compilers ${_comp} idx) |
| if (NOT idx EQUAL -1) |
| set(_need_hex_conversion TRUE) |
| endif() |
| endif() |
| endforeach() |
| |
| set(file_content " |
| // This is a generated file. Do not edit! |
| |
| #ifndef ${prefix_arg}_COMPILER_DETECTION_H |
| #define ${prefix_arg}_COMPILER_DETECTION_H |
| ") |
| |
| if (_WCD_PROLOG) |
| string(APPEND file_content "\n${_WCD_PROLOG}\n") |
| endif() |
| |
| if (_need_hex_conversion) |
| string(APPEND file_content " |
| #define ${prefix_arg}_DEC(X) (X) |
| #define ${prefix_arg}_HEX(X) ( \\ |
| ((X)>>28 & 0xF) * 10000000 + \\ |
| ((X)>>24 & 0xF) * 1000000 + \\ |
| ((X)>>20 & 0xF) * 100000 + \\ |
| ((X)>>16 & 0xF) * 10000 + \\ |
| ((X)>>12 & 0xF) * 1000 + \\ |
| ((X)>>8 & 0xF) * 100 + \\ |
| ((X)>>4 & 0xF) * 10 + \\ |
| ((X) & 0xF) \\ |
| )\n") |
| endif() |
| |
| foreach(feature ${_WCD_FEATURES}) |
| if (feature MATCHES "^c_std_") |
| # ignored |
| elseif (feature MATCHES "^cxx_std_") |
| # ignored |
| elseif (feature MATCHES "^cxx_") |
| list(APPEND _langs CXX) |
| list(APPEND CXX_features ${feature}) |
| elseif (feature MATCHES "^c_") |
| list(APPEND _langs C) |
| list(APPEND C_features ${feature}) |
| else() |
| message(FATAL_ERROR "Unsupported feature ${feature}.") |
| endif() |
| endforeach() |
| list(REMOVE_DUPLICATES _langs) |
| |
| if(_WCD_OUTPUT_FILES_VAR) |
| get_filename_component(main_file_name ${file_arg} NAME) |
| set(compiler_file_content_ |
| "#ifndef ${prefix_arg}_COMPILER_DETECTION_H |
| # error This file may only be included from ${main_file_name} |
| #endif\n") |
| endif() |
| |
| foreach(_lang ${_langs}) |
| set(target_compilers) |
| foreach(compiler ${_WCD_COMPILERS}) |
| _load_compiler_variables(${compiler} ${_lang} ${${_lang}_features}) |
| if(_cmake_oldestSupported_${compiler}) |
| list(APPEND target_compilers ${compiler}) |
| endif() |
| endforeach() |
| |
| get_property(known_features GLOBAL PROPERTY CMAKE_${_lang}_KNOWN_FEATURES) |
| foreach(feature ${${_lang}_features}) |
| list(FIND known_features ${feature} idx) |
| if (idx EQUAL -1) |
| message(FATAL_ERROR "Unsupported feature ${feature}.") |
| endif() |
| endforeach() |
| |
| if(_lang STREQUAL CXX) |
| string(APPEND file_content "\n#ifdef __cplusplus\n") |
| else() |
| string(APPEND file_content "\n#ifndef __cplusplus\n") |
| endif() |
| |
| compiler_id_detection(ID_CONTENT ${_lang} PREFIX ${prefix_arg}_ |
| ID_DEFINE |
| ) |
| |
| string(APPEND file_content "${ID_CONTENT}\n") |
| |
| set(pp_if "if") |
| foreach(compiler ${target_compilers}) |
| string(APPEND file_content "\n# ${pp_if} ${prefix_arg}_COMPILER_IS_${compiler}\n") |
| |
| if(_WCD_OUTPUT_FILES_VAR) |
| set(compile_file_name "${_WCD_OUTPUT_DIR}${prefix_arg}_COMPILER_INFO_${compiler}_${_lang}.h") |
| string(APPEND file_content "\n# include \"${compile_file_name}\"\n") |
| endif() |
| |
| if(_WCD_OUTPUT_FILES_VAR) |
| set(compiler_file_content compiler_file_content_${compiler}_${_lang}) |
| else() |
| set(compiler_file_content file_content) |
| endif() |
| |
| if(NOT _WCD_ALLOW_UNKNOWN_COMPILER_VERSIONS) |
| string(APPEND ${compiler_file_content} " |
| # if !(${_cmake_oldestSupported_${compiler}}) |
| # error Unsupported compiler version |
| # endif\n") |
| endif() |
| |
| set(PREFIX ${prefix_arg}_) |
| if (_need_hex_conversion) |
| set(MACRO_DEC ${prefix_arg}_DEC) |
| set(MACRO_HEX ${prefix_arg}_HEX) |
| else() |
| set(MACRO_DEC) |
| set(MACRO_HEX) |
| endif() |
| string(CONFIGURE "${_compiler_id_version_compute_${compiler}}" VERSION_BLOCK @ONLY) |
| string(APPEND ${compiler_file_content} "${VERSION_BLOCK}\n") |
| set(PREFIX) |
| set(MACRO_DEC) |
| set(MACRO_HEX) |
| |
| set(pp_if "elif") |
| foreach(feature ${${_lang}_features}) |
| string(TOUPPER ${feature} feature_upper) |
| set(feature_PP "COMPILER_${feature_upper}") |
| set(_define_item "\n# define ${prefix_arg}_${feature_PP} 0\n") |
| if (_cmake_feature_test_${compiler}_${feature} STREQUAL "1") |
| set(_define_item "\n# define ${prefix_arg}_${feature_PP} 1\n") |
| elseif (_cmake_feature_test_${compiler}_${feature}) |
| set(_define_item "\n# define ${prefix_arg}_${feature_PP} 0\n") |
| set(_define_item "\n# if ${_cmake_feature_test_${compiler}_${feature}}\n# define ${prefix_arg}_${feature_PP} 1\n# else${_define_item}# endif\n") |
| endif() |
| string(APPEND ${compiler_file_content} "${_define_item}") |
| endforeach() |
| endforeach() |
| if(pp_if STREQUAL "elif") |
| if(_WCD_ALLOW_UNKNOWN_COMPILERS) |
| string(APPEND file_content " |
| # endif\n") |
| else() |
| string(APPEND file_content " |
| # else |
| # error Unsupported compiler |
| # endif\n") |
| endif() |
| endif() |
| foreach(feature ${${_lang}_features}) |
| string(TOUPPER ${feature} feature_upper) |
| set(feature_PP "COMPILER_${feature_upper}") |
| set(def_name ${prefix_arg}_${feature_PP}) |
| _simpledefine(c_restrict RESTRICT restrict "") |
| _simpledefine(cxx_constexpr CONSTEXPR constexpr "") |
| _simpledefine(cxx_final FINAL final "") |
| _simpledefine(cxx_override OVERRIDE override "") |
| if (feature STREQUAL cxx_static_assert) |
| set(def_value "${prefix_arg}_STATIC_ASSERT(X)") |
| set(def_value_msg "${prefix_arg}_STATIC_ASSERT_MSG(X, MSG)") |
| set(def_fallback "enum { ${prefix_arg}_STATIC_ASSERT_JOIN(${prefix_arg}StaticAssertEnum, __LINE__) = sizeof(${prefix_arg}StaticAssert<X>) }") |
| string(APPEND file_content "# if defined(${def_name}) && ${def_name} |
| # define ${def_value} static_assert(X, #X) |
| # define ${def_value_msg} static_assert(X, MSG) |
| # else |
| # define ${prefix_arg}_STATIC_ASSERT_JOIN(X, Y) ${prefix_arg}_STATIC_ASSERT_JOIN_IMPL(X, Y) |
| # define ${prefix_arg}_STATIC_ASSERT_JOIN_IMPL(X, Y) X##Y |
| template<bool> struct ${prefix_arg}StaticAssert; |
| template<> struct ${prefix_arg}StaticAssert<true>{}; |
| # define ${def_value} ${def_fallback} |
| # define ${def_value_msg} ${def_fallback} |
| # endif |
| \n") |
| endif() |
| if (feature STREQUAL cxx_alignas) |
| set(def_value "${prefix_arg}_ALIGNAS(X)") |
| string(APPEND file_content " |
| # if defined(${def_name}) && ${def_name} |
| # define ${def_value} alignas(X) |
| # elif ${prefix_arg}_COMPILER_IS_GNU || ${prefix_arg}_COMPILER_IS_Clang || ${prefix_arg}_COMPILER_IS_AppleClang |
| # define ${def_value} __attribute__ ((__aligned__(X))) |
| # elif ${prefix_arg}_COMPILER_IS_MSVC |
| # define ${def_value} __declspec(align(X)) |
| # else |
| # define ${def_value} |
| # endif |
| \n") |
| endif() |
| if (feature STREQUAL cxx_alignof) |
| set(def_value "${prefix_arg}_ALIGNOF(X)") |
| string(APPEND file_content " |
| # if defined(${def_name}) && ${def_name} |
| # define ${def_value} alignof(X) |
| # elif ${prefix_arg}_COMPILER_IS_GNU || ${prefix_arg}_COMPILER_IS_Clang || ${prefix_arg}_COMPILER_IS_AppleClang |
| # define ${def_value} __alignof__(X) |
| # elif ${prefix_arg}_COMPILER_IS_MSVC |
| # define ${def_value} __alignof(X) |
| # endif |
| \n") |
| endif() |
| _simpledefine(cxx_deleted_functions DELETED_FUNCTION "= delete" "") |
| _simpledefine(cxx_extern_templates EXTERN_TEMPLATE extern "") |
| if (feature STREQUAL cxx_noexcept) |
| set(def_value "${prefix_arg}_NOEXCEPT") |
| string(APPEND file_content " |
| # if defined(${def_name}) && ${def_name} |
| # define ${def_value} noexcept |
| # define ${def_value}_EXPR(X) noexcept(X) |
| # else |
| # define ${def_value} |
| # define ${def_value}_EXPR(X) |
| # endif |
| \n") |
| endif() |
| _simpledefine(cxx_nullptr NULLPTR nullptr 0) |
| if (feature STREQUAL cxx_thread_local) |
| set(def_value "${prefix_arg}_THREAD_LOCAL") |
| string(APPEND file_content " |
| # if defined(${def_name}) && ${def_name} |
| # define ${def_value} thread_local |
| # elif ${prefix_arg}_COMPILER_IS_GNU || ${prefix_arg}_COMPILER_IS_Clang || ${prefix_arg}_COMPILER_IS_AppleClang |
| # define ${def_value} __thread |
| # elif ${prefix_arg}_COMPILER_IS_MSVC |
| # define ${def_value} __declspec(thread) |
| # else |
| // ${def_value} not defined for this configuration. |
| # endif |
| \n") |
| endif() |
| if (feature STREQUAL cxx_attribute_deprecated) |
| set(def_name ${prefix_arg}_${feature_PP}) |
| set(def_value "${prefix_arg}_DEPRECATED") |
| string(APPEND file_content " |
| # ifndef ${def_value} |
| # if defined(${def_name}) && ${def_name} |
| # define ${def_value} [[deprecated]] |
| # define ${def_value}_MSG(MSG) [[deprecated(MSG)]] |
| # elif ${prefix_arg}_COMPILER_IS_GNU || ${prefix_arg}_COMPILER_IS_Clang |
| # define ${def_value} __attribute__((__deprecated__)) |
| # define ${def_value}_MSG(MSG) __attribute__((__deprecated__(MSG))) |
| # elif ${prefix_arg}_COMPILER_IS_MSVC |
| # define ${def_value} __declspec(deprecated) |
| # define ${def_value}_MSG(MSG) __declspec(deprecated(MSG)) |
| # else |
| # define ${def_value} |
| # define ${def_value}_MSG(MSG) |
| # endif |
| # endif |
| \n") |
| endif() |
| endforeach() |
| |
| string(APPEND file_content "#endif\n") |
| |
| endforeach() |
| |
| if(_WCD_OUTPUT_FILES_VAR) |
| foreach(compiler ${_WCD_COMPILERS}) |
| foreach(_lang ${_langs}) |
| if(compiler_file_content_${compiler}_${_lang}) |
| set(CMAKE_CONFIGURABLE_FILE_CONTENT "${compiler_file_content_}") |
| string(APPEND CMAKE_CONFIGURABLE_FILE_CONTENT "${compiler_file_content_${compiler}_${_lang}}") |
| |
| set(compile_file_name "${_WCD_OUTPUT_DIR}${prefix_arg}_COMPILER_INFO_${compiler}_${_lang}.h") |
| set(full_path "${main_file_dir}/${compile_file_name}") |
| list(APPEND ${_WCD_OUTPUT_FILES_VAR} ${full_path}) |
| configure_file("${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in" |
| "${full_path}" |
| @ONLY |
| ) |
| endif() |
| endforeach() |
| endforeach() |
| set(${_WCD_OUTPUT_FILES_VAR} ${${_WCD_OUTPUT_FILES_VAR}} PARENT_SCOPE) |
| endif() |
| |
| if (_WCD_EPILOG) |
| string(APPEND file_content "\n${_WCD_EPILOG}\n") |
| endif() |
| string(APPEND file_content "\n#endif") |
| |
| set(CMAKE_CONFIGURABLE_FILE_CONTENT ${file_content}) |
| configure_file("${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in" |
| "${file_arg}" |
| @ONLY |
| ) |
| endfunction() |
