Support (locale-info 'paper) on MS-Windows

* src/w32proc.c (LOCALE_IPAPERSIZE): Define if undefined.
(nl_langinfo): Support _NL_PAPER_WIDTH and _NL_PAPER_HEIGHT
like glibc does.
* src/fns.c (Flocale_info): Update the doc string.

* nt/inc/langinfo.h: Add _NL_PAPER_WIDTH and _NL_PAPER_HEIGHT
to the enumeration.
(_NL_PAPER_WIDTH, _NL_PAPER_HEIGHT): Define namesake macros.
* nt/mingw-cfg.site (emacs_cv_langinfo__nl_paper_width): Set
to 'yes'.

* doc/lispref/nonascii.texi (Locales): Update the
documentation of 'locale-info' for the argument of 'paper'.

* etc/NEWS: Update the locale-info entry.

1 files changed, 5 insertions, 3 deletions

diff --git a/etc/NEWS b/etc/NEWS
index bbfc3285ee6..a9c009e9d21 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1533,12 +1533,14 @@ systems, the XRender extension to X11 is required for this to be
 available; the configure script will test for it and, if found, enable
 scaling.)
 
-+++
-** (locale-info 'paper) now returns the paper size on GNUish hosts.
-
 The new function 'image-scaling-p' can be used to test whether any
 given frame supports resizing.
 
++++
+** (locale-info 'paper) now returns the paper size on systems that support it.
+This is currently supported on GNUish hosts and on modern versions of
+MS-Windows.
+
 
 * Changes in Emacs 27.1 on Non-Free Operating Systems