re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of…

re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl)

2017-11-16  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR bootstrap/82856
	* doc/install.texi: Document incompatibility of Perl >=5.6.26
	with the required version of automake 1.11.6.

From-SVN: r254845

gcc/ChangeLog

+2017-11-16  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	PR bootstrap/82856
+	* doc/install.texi: Document incompatibility of Perl >=5.6.26
+	with the required version of automake 1.11.6.
+
 2017-11-16  Pat Haugen  <pthaugen@us.ibm.com>
 
 	* rs6000/power9.md (power9fpdiv): New automaton and cpu_unit defined

gcc/doc/install.texi

@@ -324,7 +324,7 @@ Necessary (only on some platforms) to untar the source code.  Many
 systems' @command{tar} programs will also work, only try GNU
 @command{tar} if you have problems.
 
-@item Perl version 5.6.1 (or later)
+@item Perl version between 5.6.1 and 5.6.24
 
 Necessary when targeting Darwin, building @samp{libstdc++},
 and not using @option{--disable-symvers}.
@@ -338,6 +338,8 @@ Necessary when generating manpages from Texinfo manuals.
 Used by various scripts to generate some files included in SVN (mainly
 Unicode-related and rarely changing) from source tables.
 
+Used by @command{automake}.
+
 @end table
 
 Several support libraries are necessary to build GCC, some are required,
@@ -420,6 +422,9 @@ the 1.11 series, which is currently 1.11.6.  When regenerating a directory
 to a newer version, please update all the directories using an older 1.11
 to the latest released version.
 
+Note that @command{automake} 1.11.6 is incompatible with
+@command{perl} version 5.6.26.
+
 @item gettext version 0.14.5 (or later)
 
 Needed to regenerate @file{gcc.pot}.