update build instructions

.travis.yml

@@ -21,7 +21,6 @@ install:
   - export PATH="$HOME/.evm/bin:$PATH"
   - evm install $EVM_EMACS --use
 script:
-  - autoreconf -i
-  - ./configure
+  - ./autogen.sh
   - make
   - make check

configure.ac

@@ -14,7 +14,7 @@
 ## along with this program; if not, write to the Free Software Foundation,
 ## Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
-AC_PREREQ([2.69])
+AC_PREREQ([2.68])
 AC_INIT([mu],[0.9.19],[https://github.com/djcb/mu/issues],[mu])
 AC_COPYRIGHT([Copyright (C) 2008-2016 Dirk-Jan C. Binnema])
 AC_CONFIG_HEADERS([config.h])
@@ -24,6 +24,9 @@ AC_CONFIG_SRCDIR([mu/mu.cc])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_AUX_DIR([xua]) # Win/DOS don't like 'aux'
 
+m4_ifdef([AX_COMPILER_FLAGS], [],
+    AC_MSG_ERROR([Please install autoconf-archive]))
+
 AX_IS_RELEASE([git-directory])
 AX_CHECK_ENABLE_DEBUG([yes])
 

mu4e/mu4e.texi

@@ -298,7 +298,7 @@ $ sudo yum install webkitgtk3-devel
 @anchor{Building from a release tarball}
 
 Using a release-tarball (as available from
-GoogleCode@footnote{@url{http://code.google.com/p/mu0/downloads/list}},
+GoogleCode@footnote{@url{https://github.com/djcb/mu/releases}},
 installation follows the typical steps:
 
 @example
@@ -314,17 +314,17 @@ Xapian, GMime and their dependencies must be installed.
 @subsection Building from git
 @anchor{Building from git}
 
-Alternatively, if you build from the git repository or use a tarball like the
-ones that @t{github} produces, the instructions are slightly different, and
-require you to have @t{autotools} (Autoconf, Automake, Libtool, and friends)
-installed:
+Alternatively, if you build from the git repository or use a tarball
+like the ones that @t{github} produces, the instructions are slightly
+different, and require you to have @t{autotools} (@t{autoconf},
+@t{autoconf-archive}, @t{automake}, @t{libtool}, and friends) installed:
 
 @example
 # get from git (alternatively, use a github tarball)
 $ git clone git://github.com/djcb/mu.git
 
 $ cd mu
-$ autoreconf -i && ./configure && make
+$ ./autogen.sh && ./configure && make
 # On the BSDs: use gmake instead of make
 $ sudo make install
 @end example