* doc/install.texi (*-ibm-aix*): Additional information for AIX 7.1.

From-SVN: r229263

gcc/ChangeLog

+2015-10-23  David Edelsohn  <dje.gcc@gmail.com>
+
+	* doc/install.texi (*-ibm-aix*): Additional information for AIX 7.1.
+
 2015-10-23  Steve Ellcey  <sellcey@imgtec.com>
 	    Andrew Pinski  <apinski@cavium.com>
 

gcc/doc/install.texi

@@ -1862,7 +1862,7 @@ a cross compiler, they will not be used to configure target libraries.
 @item --with-stage1-ldflags=@var{flags}
 This option may be used to set linker flags to be used when linking
 stage 1 of GCC.  These are also used when linking GCC if configured with
-@option{--disable-bootstrap}.  If @option{–with-stage1-libs} is not set to a
+@option{--disable-bootstrap}.  If @option{--with-stage1-libs} is not set to a
 value, then the default is @samp{-static-libstdc++ -static-libgcc}, if
 supported.
 
@@ -3950,6 +3950,10 @@ Support for AIX version 4.2 and older was discontinued in GCC 4.5.
 process resource limits (ulimit).  Hard limits are configured in the
 @file{/etc/security/limits} system configuration file.
 
+GCC 4.9 and above require a C++ compiler for bootstrap.  IBM VAC++ / xlC
+cannot bootstrap GCC.  xlc can bootstrap an older version of GCC and
+G++ can bootstrap recent releases of GCC.
+
 GCC can bootstrap with recent versions of IBM XLC, but bootstrapping
 with an earlier release of GCC is recommended.  Bootstrapping with XLC
 requires a larger data segment, which can be enabled through the
@@ -3998,6 +4002,12 @@ Binutils version 2.20 is the minimum level that supports bootstrap on
 AIX 5@.  The GNU Assembler has not been updated to support AIX 6@ or
 AIX 7.  The native AIX tools do interoperate with GCC@.
 
+AIX 7.1 added partial support for DWARF debugging, but full support
+requires AIX 7.1 TL03 SP7 that supports additional DWARF sections and
+fixes a bug in the assembler.  AIX 7.1 TL03 SP5 distributed a version
+of libm.a missing important symbols; a fix for IV77796 will be
+included in SP6.
+
 AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX
 assembler change that sometimes produces corrupt assembly files
 causing AIX linker errors.  The bug breaks GCC bootstrap on AIX and