strncat: Update doc regarding Solaris 11.4

[Bruno Haible]

On Solaris 11.4/SPARC (cfarm106.cfarm.net): I see this in
config.log:

configure:52008: checking whether strncat works
configure:52101: gcc -m64 -O2 -o conftest -g -O2 
-I/export/home/haible/prefix-sparc64/include -Wall -D_REENTRANT 
-L/opt/csw/lib/64 -L/export/home/haible/prefix-sparc64/lib conftest.c  >&5
configure:52101: $? = 0
configure:52101: ./conftest
../configure[6316]: eval: line 1: 5027: Memory fault(coredump)
configure:52101: $? = 267
configure: program exited with status 267

This means, they still haven't fixed their strncat function, in
umpteen years...


2023-06-25  Bruno Haible  <bruno@clisp.org>

        strncat: Update doc regarding Solaris 11.4.
        * doc/posix-functions/strncat.texi: Mention that the bug still exists on
        Solaris 11.4.
        * m4/strncat.m4 (gl_FUNC_STRNCAT): Update comments.

diff --git a/doc/posix-functions/strncat.texi b/doc/posix-functions/strncat.texi
index 365c37ee65..4926f28c9d 100644
--- a/doc/posix-functions/strncat.texi
+++ b/doc/posix-functions/strncat.texi
@@ -10,7 +10,7 @@
 @itemize
 @item
 This function dereferences too much memory on some platforms:
-Solaris 10 on SPARC, Solaris 11.0 on x86.
+Solaris 11.4 on SPARC, Solaris 11.0 on x86.
 @item
 This function cannot be called from plain inline or extern inline functions
 on some platforms:
diff --git a/m4/strncat.m4 b/m4/strncat.m4
index d8101457f8..1cef7aade0 100644
--- a/m4/strncat.m4
+++ b/m4/strncat.m4
@@ -1,4 +1,4 @@
-# strncat.m4 serial 6
+# strncat.m4 serial 7
 dnl Copyright (C) 2002-2004, 2009-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -15,7 +15,7 @@ AC_DEFUN_ONCE([gl_FUNC_STRNCAT]
   AC_CHECK_HEADERS_ONCE([sys/mman.h])
   AC_CHECK_FUNCS_ONCE([mprotect])
 
-  dnl Detect bug in Solaris 8..10 on SPARC and Solaris 11.0 on x86:
+  dnl Detect bug in Solaris 8..11.4 on SPARC and Solaris 11.0 on x86:
   dnl strncat should not dereference more than n bytes, but always dereferences
   dnl n+1 bytes if the first n bytes don't contain a NUL byte.
   dnl Assume that strncat works on platforms that lack mprotect.