# DP: Backport LTO jobserver support (documentation).

--- a/src/gcc/doc/invoke.texi
+++ b/src/gcc/doc/invoke.texi
@@ -10327,7 +10327,7 @@ If you specify the optional @var{n}, the
 generation done at link time is executed in parallel using @var{n}
 parallel jobs by utilizing an installed @command{make} program.  The
 environment variable @env{MAKE} may be used to override the program
-used.  The default value for @var{n} is 1.
+used.
 
 You can also specify @option{-flto=jobserver} to use GNU make's
 job server mode to determine the number of parallel jobs. This
@@ -10336,6 +10336,10 @@ You must prepend a @samp{+} to the comma
 for this to work.  This option likely only works if @env{MAKE} is
 GNU make.
 
+Use @option{-flto=auto} to use GNU make's job server, if available,
+or otherwise fall back to autodetection of the number of CPU threads
+present in your system.
+
 @item -flto-partition=@var{alg}
 @opindex flto-partition
 Specify the partitioning algorithm used by the link-time optimizer.