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WCDH: Add compatibility defines for deprecation.

This commit is contained in:
Stephen Kelly 2014-05-14 22:10:10 +02:00 committed by Brad King
parent 8ab2d7d462
commit 62863106f0
1 changed files with 52 additions and 10 deletions
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50
Modules/WriteCompilerDetectionHeader.cmake
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@ -133,16 +133,37 @@
# ``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.
#
# ============================= ================================ =====================
# 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]]``
# ============================= ================================ =====================
#
# 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=
# )
#=============================================================================
# Copyright 2014 Stephen Kelly <steveire@gmail.com>
@ -400,6 +421,27 @@ function(write_compiler_detection_header
# else
# define ${def_value} static_cast<void*>(0)
# endif
\n")
endif()
if (feature STREQUAL cxx_attribute_deprecated)
set(def_name ${prefix_arg}_${feature_PP})
set(def_value "${prefix_arg}_DEPRECATED")
set(file_content "${file_content}
# ifndef ${def_value}
# if ${def_name}
# define ${def_value} [[deprecated]]
# define ${def_value}_MSG(MSG) [[deprecated(MSG)]]
# elif defined(__GNUC__) || defined(__clang__)
# define ${def_value} __attribute__((__deprecated__))
# define ${def_value}_MSG(MSG) __attribute__((__deprecated__(MSG)))
# elif defined(_MSC_VER)
# 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()