[pkgsrc/trunk]: pkgsrc/mk mk: add c++20 and gnu++20

[wiz <wiz%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/613eebced622
branches:  trunk
changeset: 770565:613eebced622
user:      wiz <wiz%pkgsrc.org@localhost>
date:      Fri Dec 03 07:40:26 2021 +0000

description:
mk: add c++20 and gnu++20

diffstat:

 mk/compiler.mk |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (30 lines):

diff -r 04443cb9c77e -r 613eebced622 mk/compiler.mk
--- a/mk/compiler.mk    Fri Dec 03 01:05:29 2021 +0000
+++ b/mk/compiler.mk    Fri Dec 03 07:40:26 2021 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: compiler.mk,v 1.95 2020/06/02 06:58:13 rillig Exp $
+# $NetBSD: compiler.mk,v 1.96 2021/12/03 07:40:26 wiz Exp $
 #
 # This Makefile fragment implements handling for supported C/C++/Fortran
 # compilers.
@@ -49,8 +49,9 @@
 #      visible to the build environment, installing them if
 #      necessary.  Flags such as -std=c++99 are also added.
 #      Valid values are: c, c99, c++, c++03, gnu++03, c++0x, gnu++0x,
-#      c++11, gnu++11, c++14, gnu++14, c++17, gnu++17, fortran,
-#      fortran77, java, objc, obj-c++, and ada.  The default is "c".
+#      c++11, gnu++11, c++14, gnu++14, c++17, gnu++17, c++20, gnu++20,
+#      fortran, fortran77, java, objc, obj-c++, and ada.
+#      The default is "c".
 #
 #       The above is partly aspirational.  As an example c++11 does
 #       not force a new enough version of gcc.
@@ -87,7 +88,7 @@
 USE_LANGUAGES+=        c
 .endif
 
-_CXX_STD_VERSIONS=     gnu++17 c++17 gnu++14 c++14 gnu++11 c++11 gnu++0x c++0x gnu++03 c++03
+_CXX_STD_VERSIONS=     gnu++20 c++20 gnu++17 c++17 gnu++14 c++14 gnu++11 c++11 gnu++0x c++0x gnu++03 c++03
 .for _version_ in ${_CXX_STD_VERSIONS}
 .  if !empty(USE_LANGUAGES:M${_version_})
 USE_LANGUAGES+=                c++