autoconf264: fix build.

This version is needed to generate gcc configure files.

sys-devel/autoconf/autoconf264-2.64.recipe

@@ -10,10 +10,11 @@ COPYRIGHT="1992-2010 Free Software Foundation, Inc."
 LICENSE="
 	GNU GPL v2
 	GNU GPL v3"
-REVISION="2"
+REVISION="3"
 SOURCE_URI="http://ftp.gnu.org/gnu/autoconf/autoconf-$portVersion.tar.bz2"
 CHECKSUM_SHA256="872f4cadf12e7e7c8a2414e047fdff26b517c7f1a977d72433c124d0d3acaa85"
 SOURCE_DIR="autoconf-$portVersion"
+PATCHES="autoconf-$portVersion.patchset"
 BUILD_PACKAGE_ACTIVATION_PHASE="INSTALL"
 
 ARCHITECTURES="x86_gcc2 x86 x86_64"

sys-devel/autoconf/patches/autoconf264-2.64.patchset

@@ -0,0 +1,32 @@
+From d241bf0b11dca7eb523c18fb8ab5a630423bffb5 Mon Sep 17 00:00:00 2001
+From: Adrien Destugues <pulkomandy@pulkomandy.tk>
+Date: Sat, 13 Oct 2018 20:21:40 +0200
+Subject: Fix build
+
+Apply patch from
+http://gnu-autoconf.7623.n7.nabble.com/attachment/18842/0/autoconf.texi.2.65.patch
+to fix build.
+
+diff --git a/doc/autoconf.texi b/doc/autoconf.texi
+index 4f046c0..215a5bf 100644
+--- a/doc/autoconf.texi
++++ b/doc/autoconf.texi
+@@ -15,7 +15,6 @@
+ @c The ARG is an optional argument.  To be used for macro arguments in
+ @c their documentation (@defmac).
+ @macro ovar{varname}
+-@r{[}@var{\varname\}@r{]}@c
+ @end macro
+ 
+ @c @dvar(ARG, DEFAULT)
+@@ -23,7 +22,6 @@
+ @c The ARG is an optional argument, defaulting to DEFAULT.  To be used
+ @c for macro arguments in their documentation (@defmac).
+ @macro dvar{varname, default}
+-@r{[}@var{\varname\} = @samp{\default\}@r{]}@c
+ @end macro
+ 
+ @c Handling the indexes with Texinfo yields several different problems.
+-- 
+2.16.4
+