Merge branch 'master' of https://github.com/emacs-mirror/emacs into pgtk

Author: Yuuki Harano

configure.ac

@@ -1767,7 +1767,7 @@ AC_CHECK_HEADERS_ONCE(
   sys/sysinfo.h
   coff.h pty.h
   sys/resource.h
-  sys/utsname.h pwd.h utmp.h util.h sys/prctl.h)
+  sys/utsname.h pwd.h utmp.h util.h)
 
 AC_CACHE_CHECK([for ADDR_NO_RANDOMIZE],
   [emacs_cv_personality_addr_no_randomize],
@@ -4261,9 +4261,26 @@ pthread_sigmask strsignal setitimer timer_getoverrun \
 sendto recvfrom getsockname getifaddrs freeifaddrs \
 gai_strerror sync \
 getpwent endpwent getgrent endgrent \
-cfmakeraw cfsetspeed __executable_start log2 prctl)
+cfmakeraw cfsetspeed __executable_start log2 pthread_setname_np)
 LIBS=$OLD_LIBS
 
+if test "$ac_cv_func_pthread_setname_np" = "yes"; then
+  AC_CACHE_CHECK(
+   [whether pthread_setname_np takes a single argument],
+   [emacs_cv_pthread_setname_np_1arg],
+   [AC_COMPILE_IFELSE(
+     [AC_LANG_PROGRAM(
+       [[#include <pthread.h>]],
+       [[pthread_setname_np ("a");]])],
+     [emacs_cv_pthread_setname_np_1arg=yes],
+     [emacs_cv_pthread_setname_np_1arg=no])])
+  if test "$emacs_cv_pthread_setname_np_1arg" = "yes"; then
+    AC_DEFINE(
+      HAVE_PTHREAD_SETNAME_NP_1ARG, 1,
+      [Define to 1 if pthread_setname_np takes a single argument.])
+  fi
+fi
+
 dnl No need to check for posix_memalign if aligned_alloc works.
 AC_CHECK_FUNCS([aligned_alloc posix_memalign], [break])
 AC_CHECK_DECLS([aligned_alloc], [], [], [[#include <stdlib.h>]])

doc/lispref/frames.texi

@@ -2192,10 +2192,11 @@ it and see if it works.)
 @vindex ns-appearance@r{, a frame parameter}
 @item ns-appearance
 Only available on macOS, if set to @code{dark} draw this frame's
-window-system window using the ``vibrant dark'' theme, otherwise use
-the system default.  The ``vibrant dark'' theme can be used to set the
-toolbar and scrollbars to a dark appearance when using an Emacs theme
-with a dark background.
+window-system window using the ``vibrant dark'' theme, and if set to
+@code{light} use the ``aqua'' theme, otherwise use the system default.
+The ``vibrant dark'' theme can be used to set the toolbar and
+scrollbars to a dark appearance when using an Emacs theme with a dark
+background.
 
 @vindex ns-transparent-titlebar@r{, a frame parameter}
 @item ns-transparent-titlebar

doc/lispref/objects.texi

@@ -2336,8 +2336,12 @@ same sequence of character codes and all these codes are in the range
 @end group
 @end example
 
-However, two distinct buffers are never considered @code{equal}, even if
-their textual contents are the same.
+The @code{equal} function recursively compares the contents of objects
+if they are integers, strings, markers, vectors, bool-vectors,
+byte-code function objects, char-tables, records, or font objects.
+Other objects are considered @code{equal} only if they are @code{eq}.
+For example, two distinct buffers are never considered @code{equal},
+even if their textual contents are the same.
 @end defun
 
   For @code{equal}, equality is defined recursively; for example, given

doc/lispref/windows.texi

@@ -5915,10 +5915,6 @@ This function compares two window configurations as regards the
 structure of windows, but ignores the values of point and the
 saved scrolling positions---it can return @code{t} even if those
 aspects differ.
-
-The function @code{equal} can also compare two window configurations; it
-regards configurations as unequal if they differ in any respect, even a
-saved point.
 @end defun
 
 @defun window-configuration-frame config

etc/NEWS

@@ -42,6 +42,14 @@ applies, and please also update docstrings as needed.
 
 * Incompatible Lisp Changes in Emacs 28.1
 
+** 'equal' no longer examines some contents of window configurations.
+Instead, it considers window configurations to be equal only if they
+are 'eq'.  To compare contents, use 'compare-window-configurations'
+instead.  This change helps fix a bug in 'sxhash-equal', which returned
+incorrect hashes for window configurations and some other objects.
+
+** The obsolete function 'thread-alive-p' has been removed.
+
 
 * Lisp Changes in Emacs 28.1