maint: update the instructions for building prerequisites

* README-prereq: Update as per the latest required versions
in bootstrap.conf.  Also add a missing cd command.
Reported by Aaron Davies
Fixes http://bugs.gnu.org/15612

diff --git a/README-prereq b/README-prereq
index 66688dcf7c90d92d8854c86cc0c250e4005625ac..0232d9c967cce85057cef47d6bda80fa5924eddd 100644 (file)
--- a/README-prereq
+++ b/README-prereq
@@ -29,9 +29,12 @@ set correctly by running this command:
 
 * autoconf *
 
-  # Note Autoconf 2.62 or newer is needed to build automake-1.11.1
+  # Note Autoconf 2.62 or newer is needed to build automake-1.11.2
+  # but we specify 2.64 here as that's what coreutils requires.
+  # Please use the latest stable release version as indicated by git tags.
   git clone --depth=1 git://git.sv.gnu.org/autoconf.git
-  git checkout v2.62
+  cd autoconf
+  git checkout v2.64
   autoreconf -vi
   ./configure --prefix=$prefix
   make install
@@ -41,7 +44,7 @@ set correctly by running this command:
   # Note help2man is required to build automake fully
   git clone git://git.sv.gnu.org/automake.git
   cd automake
-  git checkout v1.11.1
+  git checkout v1.11.2
   ./bootstrap
   ./configure --prefix=$prefix
   make install