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Subject: [ptxdist] autogen.sh warnings
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Just encountered while using PTXDist with autoreconf (GNU Autoconf) 2.72:

   > ./autogen.sh
   configure.ac:41: warning: The macro 'AC_HEADER_STDC' is obsolete.
   configure.ac:41: You should run autoupdate.
   ./lib/autoconf/headers.m4:663: AC_HEADER_STDC is expanded from...
   configure.ac:41: the top level
   configure.ac:190: warning: AC_PROG_LEX without either yywrap or 
noyywrap is obsolete
   ./lib/autoconf/programs.m4:743: _AC_PROG_LEX is expanded from...
   ./lib/autoconf/programs.m4:736: AC_PROG_LEX is expanded from...
   configure.ac:190: the top level

Do we have to keep these for older systems or can they be improved to 
avoid the warnings without breaking older systems?

Sincerely
     Sven