install.texi (Building): Correct and improve statement about parallel builds.

	* doc/install.texi (Building): Correct and improve statement
	about parallel builds.

Co-Authored-By: Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>

From-SVN: r68257

gcc/ChangeLog

+2003-06-20  Daniel Egger  <degger@fhm.edu>
+            Gerald Pfeifer  <pfeifer@dbai.tuwien.ac.at>
+
+	* doc/install.texi (Building): Correct and improve statement
+	about parallel builds.
+
 2003-06-20  Andreas Jaeger  <aj@suse.de>
 
 	* c-common.c: Change _Bool to bool reverting part of the last

gcc/doc/install.texi

@@ -1318,12 +1318,13 @@ Note that if an error occurs in any step the make process will exit.
 
 @section Building in parallel
 
-If you have a multiprocessor system you can use @samp{make bootstrap
-MAKE="make -j 2" -j 2} or just @samp{make -j 2 bootstrap}
-for GNU Make 3.79 and above instead of just @samp{make bootstrap}
-when building GCC@.  You can use a bigger number instead of two if
-you like.  In most cases, it won't help to use a number bigger than
-the number of processors in your machine.
+You can use @samp{make bootstrap MAKE="make -j 2" -j 2}, or just
+@samp{make -j 2 bootstrap} for GNU Make 3.79 and above, instead of
+@samp{make bootstrap} to build GCC in parallel.
+You can also specify a bigger number, and in most cases using a value
+greater than the number of processors in your machine will result in
+fewer and shorter I/O latency hits, thus improving overall throughput;
+this is especially true for slow drives and network filesystems.
 
 @section Building the Ada compiler