[gcc r13-4766] build: doc: Obsolete Solaris 11.3 support

[gcc r13-4766] build: doc: Obsolete Solaris 11.3 support

[Rainer Orth]

https://gcc.gnu.org/g:fd69977febf399d1992bbf8d66ae9170e0a4dc9f

commit r13-4766-gfd69977febf399d1992bbf8d66ae9170e0a4dc9f
Author: Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
Date:   Sun Dec 18 20:39:14 2022 +0100

    build: doc: Obsolete Solaris 11.3 support
    
    This patch implements the Solaris 11.[0-3] obsoletion just announced in
    
            https://gcc.gnu.org/pipermail/gcc/2022-December/240322.html
    
    Bootstrapped without regressions on Solaris 11.3 (i386-pc-solaris2.11,
    sparc-sun-solaris2.11 without and with --enable-obsolete) and 11.4.
    
    2022-12-09  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
    
            gcc:
            * config.gcc: Determine Solaris minor version.
            Obsolete *-*-solaris2.11.[0-3]*.
            * doc/install.texi (Specific, *-*-solaris2*): Document it.

Diff:
---
 gcc/config.gcc       | 21 ++++++++++++++++-----
 gcc/doc/install.texi |  2 ++
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 95190233820..85ec1d88d16 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -246,14 +246,25 @@ target_type_format_char='@'
 xm_file=
 md_file=
 
+# Determine Solaris minor version
+case ${target}:`uname -v` in
+  # Only do this on Solaris.  Illumos uses illumos-* instead.
+  *-*-solaris2.11*:11.*)
+    # Restrict to native configurations.
+    if test x$host = x$target; then
+      uname_version="`uname -v`"
+      # Prepend dot as needed below.
+      target_min=".`expr "$uname_version" : '11\.\([0-9]*\)'`"
+    fi
+    ;;
+esac
+
 # Obsolete configurations.
-case ${target} in
-  *)
-  ;;
-  obsoleted-target \
+case ${target}${target_min} in
+    *-*-solaris2.11.[0-3]*		\
  )
     if test "x$enable_obsolete" != xyes; then
-      echo "*** Configuration ${target} is obsolete." >&2
+      echo "*** Configuration ${target}${target_min} is obsolete." >&2
       echo "*** Specify --enable-obsolete to build it anyway." >&2
       echo "*** Support will be REMOVED in the next major release of GCC," >&2
       echo "*** unless a maintainer comes forward." >&2
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 6884a74936b..ec31f0ac43e 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -4867,6 +4867,8 @@ supported as cross-compilation target only.
 @c alone is too unspecific and must be avoided.
 @anchor{x-x-solaris2}
 @heading *-*-solaris2*
+Support for Solaris 11.3 and earlier has been obsoleted in GCC 13, but
+can still be enabled by configuring with @option{--enable-obsolete}.
 Support for Solaris 10 has been removed in GCC 10.  Support for Solaris
 9 has been removed in GCC 5.  Support for Solaris 8 has been removed in
 GCC 4.8.  Support for Solaris 7 has been removed in GCC 4.6.