Update copyright years.

[thirdparty/gcc.git] / gcc / doc / standards.texi

diff --git a/gcc/doc/standards.texi b/gcc/doc/standards.texi
index 6aa793efd3a35f14916a202d9ad5549510115be1..f39d8b378f1cdecc33ec11c6d1096e679e353a4b 100644 (file)
--- a/gcc/doc/standards.texi
+++ b/gcc/doc/standards.texi
@@ -1,4 +1,4 @@
-@c Copyright (C) 2000-2017 Free Software Foundation, Inc.
+@c Copyright (C) 2000-2020 Free Software Foundation, Inc.
 @c This is part of the GCC manual.
 @c For copying conditions, see the file gcc.texi.
 
@@ -36,6 +36,10 @@ with some exceptions, and possibly with some extensions.
 @cindex C11
 @cindex ISO C1X
 @cindex C1X
+@cindex ISO C17
+@cindex C17
+@cindex ISO C2X
+@cindex C2X
 @cindex Technical Corrigenda
 @cindex TC1
 @cindex Technical Corrigendum 1
@@ -100,7 +104,16 @@ in 2011 as ISO/IEC 9899:2011.  (While in development, drafts of this
 standard version were referred to as @dfn{C1X}.)
 GCC has substantially complete support
 for this standard, enabled with @option{-std=c11} or
-@option{-std=iso9899:2011}.  
+@option{-std=iso9899:2011}.  A version with corrections integrated was
+prepared in 2017 and published in 2018 as ISO/IEC 9899:2018; it is
+known as @dfn{C17} and is supported with @option{-std=c17} or
+@option{-std=iso9899:2017}; the corrections are also applied with
+@option{-std=c11}, and the only difference between the options is the
+value of @code{__STDC_VERSION__}.
+
+A further version of the C standard, known as @dfn{C2X}, is under
+development; experimental and incomplete support for this is enabled
+with @option{-std=c2x}.
 
 By default, GCC provides some extensions to the C language that, on
 rare occasions conflict with the C standard.  @xref{C
@@ -196,24 +209,22 @@ A revised ISO C++ standard was published in 2011 as ISO/IEC
 14882:2011, and is referred to as C++11; before its publication it was
 commonly referred to as C++0x.  C++11 contains several changes to the
 C++ language, all of which have been implemented in GCC@. For details
-see @uref{https://gcc.gnu.org/projects/@/cxx0x.html}.
+see @uref{https://gcc.gnu.org/projects/@/cxx-status.html#cxx11}.
 To select this standard in GCC, use the option @option{-std=c++11}.
 
 Another revised ISO C++ standard was published in 2014 as ISO/IEC
 14882:2014, and is referred to as C++14; before its publication it was
 sometimes referred to as C++1y.  C++14 contains several further
 changes to the C++ language, all of which have been implemented in GCC@.
-For details see @uref{https://gcc.gnu.org/projects/@/cxx1y.html}.
+For details see @uref{https://gcc.gnu.org/projects/@/cxx-status.html#cxx14}.
 To select this standard in GCC, use the option @option{-std=c++14}.
 
-GCC also supports the C++ Concepts Technical Specification,
-ISO/IEC TS 19217:2015, which allows constraints to be defined for templates,
-allowing template arguments to be checked and for templates to be
-overloaded or specialized based on the constraints. Support for C++ Concepts
-is included in an experimental C++1z mode that corresponds to the next
-revision of the ISO C++ standard, expected to be published in 2017. To enable
-C++1z support in GCC, use the option @option{-std=c++17} or
-@option{-std=c++1z}.
+The C++ language was further revised in 2017 and ISO/IEC 14882:2017 was
+published.  This is referred to as C++17, and before publication was
+often referred to as C++1z.  GCC supports all the changes in the new
+specification.  For further details see
+@uref{https://gcc.gnu.org/projects/@/cxx-status.html#cxx1z}.  Use the option
+@option{-std=c++17} to select this variant of C++.
 
 More information about the C++ standards is available on the ISO C++
 committee's web site at @uref{http://www.open-std.org/@/jtc1/@/sc22/@/wg21/}.
@@ -232,7 +243,7 @@ select an extended version of the C++ language explicitly with
 @option{-std=gnu++98} (for C++98 with GNU extensions), or
 @option{-std=gnu++11} (for C++11 with GNU extensions), or
 @option{-std=gnu++14} (for C++14 with GNU extensions), or
-@option{-std=gnu++1z} (for C++1z with GNU extensions).  
+@option{-std=gnu++17} (for C++17 with GNU extensions).  
 
 The default, if
 no C++ language dialect options are given, is @option{-std=gnu++14}.
@@ -290,7 +301,7 @@ GCC has currently no support for non-fragile instance variables.
 The authoritative manual on Objective-C 2.0 is available from Apple:
 @itemize
 @item
-@uref{https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html}
+@uref{https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html}
 @end itemize
 
 For more information concerning the history of Objective-C that is
@@ -309,6 +320,12 @@ capability is typically utilized to implement the HSA runtime API's HSAIL
 finalization extension for a gcc supported processor. HSA standards are
 freely available at @uref{http://www.hsafoundation.com/standards/}.
 
+@section D language
+
+GCC supports the D 2.0 programming language.  The D language itself is
+currently defined by its reference implementation and supporting language
+specification, described at @uref{https://dlang.org/spec/spec.html}.
+
 @section References for Other Languages
 
 @xref{Top, GNAT Reference Manual, About This Guide, gnat_rm,