GNU autotools configure autoreconf

I have a question when working with autotools, specifically when working with generating configure scripts by running autoreconf -fi I'll get these warnings: libtoolize: putting auxiliary files in '.'. libtoolize: copying file './ltmain.sh' libtoolize: Consider adding 'AC_CONFIG_MACRO_DIRS([m4])' to configure.ac, libtoolize: and rerunning libtoolize and aclocal. libtoolize: Consider adding '-I m4' to ACLOCAL_AMFLAGS in Makefile.am. configure.ac:12: installing './compile' configure.ac:15: installing './config.guess' configure.ac:15: installing './config.sub' configure.ac:6: installing './install-sh' configure.ac:6: installing './missing' Makefile.am: installing './INSTALL' src/Makefile.am:5: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS') src/Makefile.am: installing './depcomp' src/filteropt/Makefile.am:3: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS') src/memory/Makefile.am:3: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS') src/pagemanager/Makefile.am:3: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS') src/raster/Makefile.am:5: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS') src/raster/blendSource/Makefile.am:3: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS') After this I can manually go through and change INCLUDES to AM_CPPFLAGS as well as adding -I m4 but shouldn't I be able to update the configure files so that I do not get these warnings? Where would I make those edits so that I can avoid these warnings?