configure.ac:102: warning: AC_PROG_LEX without either yywrap or noyywrap is obsolete
./lib/autoconf/programs.m4:716: _AC_PROG_LEX is expanded from...
./lib/autoconf/programs.m4:709: AC_PROG_LEX is expanded from...
configure.ac:102: the top level
configure.ac:450: warning: The macro `AC_TYPE_SIGNAL' is obsolete.
configure.ac:450: You should run autoupdate.
./lib/autoconf/types.m4:776: AC_TYPE_SIGNAL is expanded from...
configure.ac:450: the top level