Simplify Solaris port

This should avoid some configuration confusion as exemplified
by Jeffrey Walton’s recent bug report (Bug#42675).
* configure.ac (opsys): Simplify Solaris configuration by
not worrying about Solaris 9 and earlier, as they are no
longer supported by the Solaris developers.  This should
support Walton’s ‘./configure --build=x86_64-sun-solaris’.
Instead of bothering with ‘opsys=sol2-6’ and ‘opsys=sol2-10’,
just use ‘opsys=solaris’.  All uses changed.
(emacs_check_sunpro_c): Remove unused var.
* doc/misc/tramp.texi (Remote programs):
* etc/MACHINES, etc/PROBLEMS:
Modernize PATH for Oracle Developer Studio.
* etc/PROBLEMS: Move Solaris-related problems to legacy area,
except those that are still relevant.

5 files changed, 110 insertions, 132 deletions

diff --git a/configure.ac b/configure.ac
index 4ee4517e11c..c9aa076eb3b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -748,44 +748,21 @@ case "${canonical}" in
     opsys=aix4-2
   ;;
 
-  ## Suns
-  *-sun-solaris* \
-    | i[3456]86-*-solaris2* | i[3456]86-*-sunos5* \
-    | x86_64-*-solaris2*    | x86_64-*-sunos5*)
+  ## Solaris
+  *-*-solaris* | *-*-sunos*)
     case "${canonical}" in
       i[3456]86-*-* )   ;;
       amd64-*-*|x86_64-*-*) ;;
       sparc* )		;;
       * )		unported=yes ;;
     esac
-    case "${canonical}" in
-      *-sunos5.[1-9][0-9]* | *-solaris2.[1-9][0-9]* )
-		opsys=sol2-10
-		emacs_check_sunpro_c=yes
-		;;
-      *-sunos5.[1-5]* | *-solaris2.[1-5]* ) unported=yes ;;
-      ## Note that Emacs 23.1's NEWS said the following would be dropped.
-      *-sunos5.6* | *-solaris2.6* )
-		opsys=sol2-6
-		RANLIB="ar -ts"
-		;;
-      ## 5.7 EOL Aug 2008, 5.8 EOL Mar 2012.
-      *-sunos5.[7-9]* | *-solaris2.[7-9]* )
-		opsys=sol2-6
-		emacs_check_sunpro_c=yes
-		;;
-    esac
+    opsys=solaris
     ## Watch out for a compiler that we know will not work.
-    case "${canonical}" in
-     *-solaris* | *-sunos5* )
-		if [ "x$CC" = x/usr/ucb/cc ]; then
-		  ## /usr/ucb/cc doesn't work;
-		  ## we should find some other compiler that does work.
-		  unset CC
-		fi
-		;;
-      *) ;;
-    esac
+    if [ "$CC" = /usr/ucb/cc ]; then
+      ## /usr/ucb/cc doesn't work;
+      ## we should find some other compiler that does work.
+      unset CC
+    fi
   ;;
 
   ## QNX Neutrino
@@ -1476,14 +1453,11 @@ case "$opsys" in
   mingw32)
    UNEXEC_OBJ=unexw32.o
    ;;
-  sol2-10)
+  solaris)
    # Use the Solaris dldump() function, called from unexsol.c, to dump
    # emacs, instead of the generic ELF dump code found in unexelf.c.
    # The resulting binary has a complete symbol table, and is better
    # for debugging and other observability tools (debuggers, pstack, etc).
-   #
-   # It is likely that dldump() works with older Solaris too, but this has
-   # not been tested, so for now this change is for Solaris 10 or newer.
    UNEXEC_OBJ=unexsol.o
    ;;
   *)
@@ -1586,7 +1560,7 @@ case "$opsys" in
 
   qnxnto) LIBS_SYSTEM="-lsocket" ;;
 
-  sol2*) LIBS_SYSTEM="-lsocket -lnsl" ;;
+  solaris) LIBS_SYSTEM="-lsocket -lnsl" ;;
 
   ## Motif needs -lgen.
   unixware) LIBS_SYSTEM="-lsocket -lnsl -lelf -lgen" ;;
@@ -1647,7 +1621,7 @@ case $opsys in
     SYSTEM_TYPE=berkeley-unix
     ;;
 
-  sol2* | unixware )
+  solaris | unixware )
     SYSTEM_TYPE=usg-unix-v
     ;;
 
@@ -2291,7 +2265,7 @@ system_malloc=yes
 test $with_unexec = yes &&
 case "$opsys" in
   ## darwin ld insists on the use of malloc routines in the System framework.
-  darwin | mingw32 | nacl | sol2-10) ;;
+  darwin | mingw32 | nacl | solaris) ;;
   cygwin | qnxnto | freebsd)
 	  hybrid_malloc=yes
           system_malloc= ;;
@@ -2427,7 +2401,7 @@ if test "$ac_cv_header_pthread_h" && test "$opsys" != "mingw32"; then
     # need special flags to disable these optimizations. For example, the
     # definition of 'errno' in <errno.h>.
     case $opsys in
-      hpux* | sol*)
+      hpux* | solaris)
 	AC_DEFINE([_REENTRANT], 1,
 	  [Define to 1 if your system requires this in multithreaded code.]);;
       aix4-2)
@@ -2557,7 +2531,7 @@ fail;
     ## inoue@ainet.or.jp says Solaris has a bug related to X11R6-style
     ## XIM support.
     case "$opsys" in
-      sol2-*) : ;;
+      solaris) : ;;
       *) AC_DEFINE(HAVE_X11R6_XIM, 1,
            [Define if you have usable X11R6-style XIM support.])
          ;;
@@ -4692,7 +4666,7 @@ if test "$USE_X_TOOLKIT" != "none"; then
 fi
 
 case $opsys in
-  sol2* | unixware )
+  solaris | unixware )
     dnl Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
     dnl instead, there's a system variable _sys_nsig.  Unfortunately, we
     dnl need the constant to dimension an array.  So wire in the appropriate
@@ -4705,7 +4679,7 @@ emacs_broken_SIGIO=no
 
 case $opsys in
   dnl SIGIO exists, but the feature doesn't work in the way Emacs needs.
-  hpux* | nacl | openbsd | sol2* | unixware )
+  hpux* | nacl | openbsd | solaris | unixware )
     emacs_broken_SIGIO=yes
     ;;
 
@@ -4754,7 +4728,7 @@ case $opsys in
 esac
 
 case $opsys in
-  gnu-* | sol2-10 )
+  gnu-* | solaris )
     dnl FIXME Can't we test if this exists (eg /proc/$$)?
     AC_DEFINE(HAVE_PROCFS, 1, [Define if you have the /proc filesystem.])
   ;;
@@ -4883,7 +4857,7 @@ case $opsys in
     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [sprintf (pty_name, "/dev/pty/tty%c%x", c, i);])
     ;;
 
-  sol2* )
+  solaris )
     dnl On SysVr4, grantpt(3) forks a subprocess, so do not use
     dnl O_CLOEXEC when opening the pty, and keep the SIGCHLD handler
     dnl from intercepting that death.  If any child but grantpt's should die
@@ -4893,7 +4867,7 @@ case $opsys in
     ;;
 
   unixware )
-    dnl Comments are as per sol2*.
+    dnl Comments are as per solaris.
     AC_DEFINE(PTY_OPEN, [fd = open (pty_name, O_RDWR | O_NONBLOCK)])
     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [{ char *ptsname (int), *ptyname; int grantpt_result; sigset_t blocked; sigemptyset (&blocked); sigaddset (&blocked, SIGCHLD); pthread_sigmask (SIG_BLOCK, &blocked, 0); grantpt_result = grantpt (fd); pthread_sigmask (SIG_UNBLOCK, &blocked, 0); if (grantpt_result == -1) fatal("could not grant slave pty"); if (unlockpt(fd) == -1) fatal("could not unlock slave pty"); if (!(ptyname = ptsname(fd))) fatal ("could not enable slave pty"); snprintf (pty_name, PTY_NAME_SIZE, "%s", ptyname); }])
     ;;
@@ -4901,7 +4875,7 @@ esac
 
 
 case $opsys in
-  sol2* | unixware )
+  solaris | unixware )
     dnl This change means that we don't loop through allocate_pty too
     dnl many times in the (rare) event of a failure.
     AC_DEFINE(FIRST_PTY_LETTER, ['z'])
@@ -4996,7 +4970,7 @@ if test x$GCC = xyes; then
    AC_DEFINE(GC_SETJMP_WORKS, 1)
 else
   case $opsys in
-    aix* | dragonfly | freebsd | netbsd | openbsd | sol2* )
+    aix* | dragonfly | freebsd | netbsd | openbsd | solaris )
       AC_DEFINE(GC_SETJMP_WORKS, 1)
       ;;
   esac
@@ -5043,7 +5017,7 @@ case $emacs_cv_func_sigsetjmp,$emacs_cv_alternate_stack,$opsys in
 esac
 
 case $opsys in
-  sol2* | unixware )
+  solaris | unixware )
     dnl TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
     dnl subprocesses the usual way.  But TIOCSIGNAL does work for PTYs,
     dnl and this is all we need.
@@ -5053,7 +5027,7 @@ esac
 
 
 case $opsys in
-  hpux* | sol2* )
+  hpux* | solaris )
     dnl Used in xfaces.c.
     AC_DEFINE(XOS_NEEDS_TIME_H, 1, [Compensate for a bug in Xos.h on
       some systems, where it requires time.h.])
@@ -5108,7 +5082,7 @@ case $opsys in
     fi
     ;;
 
-  sol2*)
+  solaris)
     AC_DEFINE(USG, [])
     AC_DEFINE(USG5_4, [])
     AC_DEFINE(SOLARIS2, [], [Define if the system is Solaris.])
@@ -5173,7 +5147,7 @@ case $opsys in
       reopen it in the child.])
     ;;
 
-  sol2-10)
+  solaris)
     AC_DEFINE(_STRUCTURED_PROC, 1, [Needed for system_process_attributes
       on Solaris.])
     ;;
diff --git a/doc/misc/tramp.texi b/doc/misc/tramp.texi
index 91b1e996f45..56cd220e20e 100644
--- a/doc/misc/tramp.texi
+++ b/doc/misc/tramp.texi
@@ -2105,7 +2105,7 @@ To improve performance and accuracy of remote file access,
 @file{/usr/bin}, which are reasonable for most hosts.  To accommodate
 differences in hosts and paths, for example, @file{/bin:/usr/bin} on
 Debian GNU/Linux or
-@file{/usr/xpg4/bin:/usr/ccs/bin:/usr/bin:/opt/SUNWspro/bin} on
+@file{/usr/xpg4/bin:/usr/ccs/bin:/usr/bin:/opt/developerstudio12.6/bin} on
 Solaris, @value{tramp} queries the remote host with @command{getconf
 PATH} and updates the symbol @code{tramp-default-remote-path}.
 
diff --git a/etc/MACHINES b/etc/MACHINES
index 1bb244b49b0..78e9cef0fd7 100644
--- a/etc/MACHINES
+++ b/etc/MACHINES
@@ -81,25 +81,26 @@ the list at the end of this file.
 
 ** Solaris
 
-  On Solaris it is also possible to use either GCC or Solaris Studio
-  to build Emacs, by pointing ./configure to the right compiler:
+  On Solaris it is also possible to use either GCC or Oracle Developer
+  Studio to build Emacs, by pointing ./configure to the right compiler:
 
-    ./configure CC='/usr/sfw/bin/gcc'  # GCC
-    ./configure CC='cc'                # Solaris Studio
+    ./configure                # Defaults to 'gcc' if available.
+    ./configure CC='cc'        # Oracle Developer Studio
 
-  On Solaris, do not use /usr/ucb/cc.  Use /opt/SUNWspro/bin/cc.  Make
-  sure that /usr/ccs/bin and /opt/SUNWspro/bin are in your PATH before
-  /usr/ucb.  (Most free software packages have the same requirement on
-  Solaris.)  With this compiler, use '/opt/SUNWspro/bin/cc -E' as the
+  On Solaris, do not use /usr/ucb/cc.  Use Oracle Developer Studio.
+  Make sure that /usr/ccs/bin and the Oracle Developer Studio bin
+  directory (e.g., /opt/developerstudio12.6/bin) are in your PATH
+  before /usr/ucb.  (Most free software packages have the same
+  requirement on Solaris.)  With this compiler, use 'cc -E' as the
   preprocessor.  If this inserts extra whitespace into its output (see
-  the PROBLEMS file) then add the option '-Xs'.
+  the PROBLEMS file), add the option '-Xs'.
 
   To build a 64-bit Emacs (with larger maximum buffer size) on a
-  Solaris system which supports 64-bit executables, specify the -m64
+  Solaris system that defaults to 32-bit executables, specify the -m64
   compiler option.  For example:
 
-    ./configure CC='/usr/sfw/bin/gcc -m64'  # GCC
-    ./configure CC='cc -m64'                # Solaris Studio
+    ./configure CC='gcc -m64'  # GCC
+    ./configure CC='cc -m64'   # Oracle Developer Studio
 
 
 * Obsolete platforms
diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index 4ce738d9a54..598a79f978a 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -2222,6 +2222,7 @@ We list bugs in current versions here.  See also the section on legacy
 systems.
 
 *** On Solaris 10, Emacs crashes during the build process.
+(This applies only with './configure --with-unexec=yes', which is rare.)
 This was reported for Emacs 25.2 on i386-pc-solaris2.10 with Sun
 Studio 12 (Sun C 5.9) and with Oracle Developer Studio 12.6 (Sun C
 5.15), and intermittently for sparc-sun-solaris2.10 with Oracle
@@ -2239,66 +2240,6 @@ Solaris.  See Bug#26638.
 This is a Solaris feature (at least on Intel x86 cpus).  Type C-r
 C-r C-t, to toggle whether C-x gets through to Emacs.
 
-*** Problem with remote X server on Suns.
-
-On a Sun, running Emacs on one machine with the X server on another
-may not work if you have used the unshared system libraries.  This
-is because the unshared libraries fail to use YP for host name lookup.
-As a result, the host name you specify may not be recognized.
-
-*** Solaris 2.6: Emacs crashes with SIGBUS or SIGSEGV on Solaris after you delete a frame.
-
-We suspect that this is a bug in the X libraries provided by
-Sun.  There is a report that one of these patches fixes the bug and
-makes the problem stop:
-
-105216-01 105393-01 105518-01 105621-01 105665-01 105615-02 105216-02
-105667-01 105401-08 105615-03 105621-02 105686-02 105736-01 105755-03
-106033-01 105379-01 105786-01 105181-04 105379-03 105786-04 105845-01
-105284-05 105669-02 105837-01 105837-02 105558-01 106125-02 105407-01
-
-Another person using a newer system (kernel patch level Generic_105181-06)
-suspects that the bug was fixed by one of these more recent patches:
-
-106040-07  SunOS 5.6: X Input & Output Method patch
-106222-01  OpenWindows 3.6: filemgr (ff.core) fixes
-105284-12  Motif 1.2.7: sparc Runtime library patch
-
-*** Solaris 7 or 8: Emacs reports a BadAtom error (from X)
-
-This happens when Emacs was built on some other version of Solaris.
-Rebuild it on Solaris 8.
-
-*** When using M-x dbx with the SparcWorks debugger, the 'up' and 'down'
-commands do not move the arrow in Emacs.
-
-You can fix this by adding the following line to '~/.dbxinit':
-
- dbxenv output_short_file_name off
-
-*** On Solaris, CTRL-t is ignored by Emacs when you use
-the fr.ISO-8859-15 locale (and maybe other related locales).
-
-You can fix this by editing the file:
-
-        /usr/openwin/lib/locale/iso8859-15/Compose
-
-Near the bottom there is a line that reads:
-
-        Ctrl<t> <quotedbl> <Y>                  : "\276"        threequarters
-
-while it should read:
-
-        Ctrl<T> <quotedbl> <Y>                  : "\276"        threequarters
-
-Note the lower case <t>.  Changing this line should make C-t work.
-
-*** On Solaris, Emacs fails to set menu-bar-update-hook on startup, with error
-"Error in menu-bar-update-hook: (error Point before start of properties)".
-This seems to be a GCC optimization bug that occurs for GCC 4.1.2 (-g
-and -g -O2) and GCC 4.2.3 (-g -O and -g -O2).  You can fix this by
-compiling with GCC 4.2.3 or CC 5.7, with no optimizations.
-
 * Runtime problems specific to MS-Windows
 
 ** Emacs on Windows 9X requires UNICOWS.DLL
@@ -2733,13 +2674,13 @@ Libxpm is available for macOS as part of the XQuartz project.
 
 This indicates a mismatch between the C compiler and preprocessor that
 configure is using.  For example, on Solaris 10 trying to use
-CC=/opt/SUNWspro/bin/cc (the Sun Studio compiler) together with
-CPP=/usr/ccs/lib/cpp can result in errors of this form (you may also
-see the error '"/usr/include/sys/isa_defs.h", line 500: undefined control').
+CC=/opt/developerstudio12.6/bin/cc (the Oracle Developer Studio
+compiler) together with CPP=/usr/lib/cpp can result in errors of
+this form.
 
 The solution is to tell configure to use the correct C preprocessor
-for your C compiler (CPP="/opt/SUNWspro/bin/cc -E" in the above
-example).
+for your C compiler (CPP="/opt/developerstudio12.6/bin/cc -E" in the
+above example).
 
 ** Compilation
 
@@ -3110,7 +3051,69 @@ This section covers bugs reported on very old hardware or software.
 If you are using hardware and an operating system shipped after 2000,
 it is unlikely you will see any of these.
 
-*** Solaris 2.x
+** Solaris
+
+*** Problem with remote X server on Suns.
+
+On a Sun, running Emacs on one machine with the X server on another
+may not work if you have used the unshared system libraries.  This
+is because the unshared libraries fail to use YP for host name lookup.
+As a result, the host name you specify may not be recognized.
+
+*** Solaris 2.6: Emacs crashes with SIGBUS or SIGSEGV on Solaris after you delete a frame.
+
+We suspect that this is a bug in the X libraries provided by
+Sun.  There is a report that one of these patches fixes the bug and
+makes the problem stop:
+
+105216-01 105393-01 105518-01 105621-01 105665-01 105615-02 105216-02
+105667-01 105401-08 105615-03 105621-02 105686-02 105736-01 105755-03
+106033-01 105379-01 105786-01 105181-04 105379-03 105786-04 105845-01
+105284-05 105669-02 105837-01 105837-02 105558-01 106125-02 105407-01
+
+Another person using a newer system (kernel patch level Generic_105181-06)
+suspects that the bug was fixed by one of these more recent patches:
+
+106040-07  SunOS 5.6: X Input & Output Method patch
+106222-01  OpenWindows 3.6: filemgr (ff.core) fixes
+105284-12  Motif 1.2.7: sparc Runtime library patch
+
+*** Solaris 7 or 8: Emacs reports a BadAtom error (from X)
+
+This happens when Emacs was built on some other version of Solaris.
+Rebuild it on Solaris 8.
+
+*** When using M-x dbx with the SparcWorks debugger, the 'up' and 'down'
+commands do not move the arrow in Emacs.
+
+You can fix this by adding the following line to '~/.dbxinit':
+
+ dbxenv output_short_file_name off
+
+*** On Solaris, CTRL-t is ignored by Emacs when you use
+the fr.ISO-8859-15 locale (and maybe other related locales).
+
+You can fix this by editing the file:
+
+        /usr/openwin/lib/locale/iso8859-15/Compose
+
+Near the bottom there is a line that reads:
+
+        Ctrl<t> <quotedbl> <Y>                  : "\276"        threequarters
+
+while it should read:
+
+        Ctrl<T> <quotedbl> <Y>                  : "\276"        threequarters
+
+Note the lower case <t>.  Changing this line should make C-t work.
+
+*** On Solaris, Emacs fails to set menu-bar-update-hook on startup, with error
+"Error in menu-bar-update-hook: (error Point before start of properties)".
+This seems to be a GCC optimization bug that occurs for GCC 4.1.2 (-g
+and -g -O2) and GCC 4.2.3 (-g -O and -g -O2).  You can fix this by
+compiling with GCC 4.2.3 or CC 5.7, with no optimizations.
+
+*** Other legacy Solaris problems
 
 **** Strange results from format %d in a few cases, on a Sun.
 
diff --git a/lisp/dired-aux.el b/lisp/dired-aux.el
index 806a3955e4d..777df79a6ef 100644
--- a/lisp/dired-aux.el
+++ b/lisp/dired-aux.el
@@ -1014,8 +1014,8 @@ To undo the killing, the undo command can be used as normally."
 (defvar dired-compress-file-suffixes
   '(
     ;; "tar -zxf" isn't used because it's not available on the
-    ;; Solaris10 version of tar. Solaris10 becomes obsolete in 2021.
-    ;; Same thing on AIX 7.1.
+    ;; Solaris 10 version of tar (obsolete in 2024?).
+    ;; Same thing on AIX 7.1 (obsolete 2023?) and 7.2 (obsolete 2022?).
     ("\\.tar\\.gz\\'" "" "gzip -dc %i | tar -xf -")
     ("\\.tgz\\'" "" "gzip -dc %i | tar -xf -")
     ("\\.gz\\'" "" "gunzip")