* aclocal: warning: couldn't open directory 'm4': No such file or directory
* libtoolize: Consider adding 'AC_CONFIG_MACRO_DIRS([m4])' to configure.ac
* libtoolize: Consider adding '-I m4' to ACLOCAL_AMFLAGS in Makefile.am
* configure.ac:9: warning: 'AM_CONFIG_HEADER': this macro is obsolete
configure.ac:9: You should use the 'AC_CONFIG_HEADERS' macro instead
* configure.ac:22: warning: The macro `AC_PROG_LIBTOOL' is obsolete
* configure.ac:86: warning: AC_OUTPUT should be used without arguments
Change-Id: I3199e7de0a04b4df89d01277cdb305d33902fcc2
