d9e2928f02
Implement run_configure and autoconf overrides run_configure is a new platform specific way to do the configure step of the build. It was implemented to allow the use of the ac_overrides variable to easily override autoconf settings which is needed on Irix. run_configure will also run an automatic scan (using an external script check_ac) of config.log for suspicious ac_cv_lib definitions. The contents of ac_overrides will be added in the Configure part of the relnotes. Fixed the FIXME's regarding perl in auto_rel by replacing perl with awk. Thanks to Laura Fairhead who posted that awk trick on usenet in 2001.