config.gcc: Obsolete alpha*-dec-osf5.1, mips-sgi-irix6.5.

	* config.gcc: Obsolete alpha*-dec-osf5.1, mips-sgi-irix6.5.
	* doc/install.texi (Specific, alpha*-dec-osf5.1): Document it.
	(Specific, mips-sgi-irix6): Likewise.

From-SVN: r175751

gcc/ChangeLog

 2011-07-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
+	* config.gcc: Obsolete alpha*-dec-osf5.1, mips-sgi-irix6.5.
+	* doc/install.texi (Specific, alpha*-dec-osf5.1): Document it.
+	(Specific, mips-sgi-irix6): Likewise.
+
+2011-07-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
 	PR libmudflap/49549
 	* doc/sourcebuild.texi (Effective-Target Keywords): Document gld.
 

gcc/config.gcc

@@ -245,7 +245,9 @@ md_file=
 
 # Obsolete configurations.
 case ${target} in
-   i[34567]86-*-interix3*		\
+   alpha*-dec-osf5.1*			\
+ | i[34567]86-*-interix3*		\
+ | mips-sgi-irix6.5			\
  | mips*-*-openbsd*			\
  | score-*				\
  | *-*-solaris2.8*			\

gcc/doc/install.texi

@@ -3105,10 +3105,12 @@ Systems using processors that implement the DEC Alpha architecture and
 are running the DEC/Compaq/HP Unix (DEC OSF/1, Digital UNIX, or Compaq/HP
 Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
 
-As of GCC 3.2, versions before @code{alpha*-dec-osf4} are no longer
-supported.  (These are the versions which identify themselves as DEC
-OSF/1.)  As of GCC 4.6, support for Tru64 UNIX V4.0 and V5.0 has been
-removed.
+Support for Tru64 UNIX V5.1 has been obsoleted in GCC 4.7, but can still
+be enabled by configuring with @option{--enable-obsolete}.  Support will
+be removed in GCC 4.8.  As of GCC 4.6, support for Tru64 UNIX V4.0 and
+V5.0 has been removed.  As of GCC 3.2, versions before
+@code{alpha*-dec-osf4} are no longer supported.  (These are the versions
+which identify themselves as DEC OSF/1.)
 
 On Tru64 UNIX, virtual memory exhausted bootstrap failures
 may be fixed by reconfiguring Kernel Virtual Memory and Swap parameters
@@ -3887,11 +3889,13 @@ Support for IRIX 5 has been removed in GCC 4.6.
 @end html
 @heading @anchor{mips-sgi-irix6}mips-sgi-irix6
 
-Support for IRIX 6 releases before 6.5 has been removed in GCC 4.6, as
-well as support for
-the O32 ABI.  It is @emph{strongly} recommended to upgrade to at least
-IRIX 6.5.18.  This release introduced full ISO C99 support, though for
-the N32 and N64 ABIs only.
+Support for IRIX 6.5 has been obsoleted in GCC 4.7, but can still be
+enabled by configuring with @option{--enable-obsolete}.  Support will be
+removed in GCC 4.8.  Support for IRIX 6 releases before 6.5 has been
+removed in GCC 4.6, as well as support for the O32 ABI.  It is
+@emph{strongly} recommended to upgrade to at least IRIX 6.5.18.  This
+release introduced full ISO C99 support, though for the N32 and N64 ABIs
+only.
 
 To build and use GCC on IRIX 6.5, you need the IRIX Development Foundation
 (IDF) and IRIX Development Libraries (IDL).  They are included with the