automake 1.15 gives warnings and exits with non-zero values if you .in and are using deprecated macro usage

[derekschrock]

[derekschrock]

For reference:

$ automake -a
automake-1.15: warning: autoconf input should be named 'configure.ac', not 'configure.in'
configure.in:2: warning: AM_INIT_AUTOMAKE: two- and three-arguments forms are deprecated.  For more info, see:
configure.in:2: http://www.gnu.org/software/automake/manual/automake.html#Modernize-AM_005fINIT_005fAUTOMAKE-invocation
configure.in:2: error: version mismatch.  This is Automake 1.15,
configure.in:2: but the definition used by this AM_INIT_AUTOMAKE
configure.in:2: comes from Automake 1.11.6.  You should recreate
configure.in:2: aclocal.m4 with aclocal and run automake again.
configure.in:2: warning: The 'AM_PROG_MKDIR_P' macro is deprecated, and its use is discouraged.
configure.in:2: You should use the Autoconf-provided 'AC_PROG_MKDIR_P' macro instead,
configure.in:2: and use '$(MKDIR_P)' instead of '$(mkdir_p)'in your Makefile.am files.
Makefile.am: installing './depcomp'
automake-1.15: warning: autoconf input should be named 'configure.ac', not 'configure.in'

$ aclocal
aclocal-1.15: warning: autoconf input should be named 'configure.ac', not 'configure.in'