install.texi (*-ibm-aix*): Document use of Bash to speed up configuration.

        * doc/install.texi (*-ibm-aix*): Document use of Bash to speed up
        configuration.

From-SVN: r78883

gcc/ChangeLog

+2004-03-04  David Edelsohn  <edelsohn@gnu.org>
+
+	* doc/install.texi (*-ibm-aix*): Document use of Bash to speed up
+	configuration.
+
 2004-03-03  Ian Lance Taylor  <ian@wasabisystems.com>
 
 	* ggc-zone.c (ggc_pch_write_object): Don't align file pointer.

gcc/doc/install.texi

@@ -2875,6 +2875,18 @@ Support for AIX version 3 and older was discontinued in GCC 3.4.
 AIX Make frequently has problems with GCC makefiles.  GNU Make 3.79.1 or
 newer is recommended to build on this platform.
 
+To speed up the configuration phases of bootstrapping and installing GCC,
+one may use GNU Bash instead of AIX @command{/bin/sh}, e.g.,
+
+@smallexample
+   % CONFIG_SHELL=/opt/freeware/bin/bash
+   % export CONFIG_SHELL
+@end smallexample
+
+and then proceed as described in @uref{build.html,,the build instructions},
+where we strongly recommend using GNU make and specifying an absolute path
+to invoke @var{srcdir}/configure.
+
 Errors involving @code{alloca} when building GCC generally are due
 to an incorrect definition of @code{CC} in the Makefile or mixing files
 compiled with the native C compiler and GCC@.  During the stage1 phase of