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Diffstat (limited to 'Modules/WriteCompilerDetectionHeader.cmake')
| -rw-r--r-- | Modules/WriteCompilerDetectionHeader.cmake | 632 |
1 files changed, 632 insertions, 0 deletions
diff --git a/Modules/WriteCompilerDetectionHeader.cmake b/Modules/WriteCompilerDetectionHeader.cmake new file mode 100644 index 000000000..e7f991249 --- /dev/null +++ b/Modules/WriteCompilerDetectionHeader.cmake @@ -0,0 +1,632 @@ +# 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() |