There appears to be a setup bug in c30 and c31 releases that omits the proper library references from Makefile_gnu when the 'X' option is used with The symptom is a lengthy list of undefined globals, many with the letter 'x' as the first char of the name. The workaround is to edit build/gnu/Makefile_gnu, and change line 10


to include the library ref as

GLIB = -L/usr/X11R6/lib -lX11

and then re-run; the final 'link and load' step should now succeed. It is not necessary to re-compile.

A distribution fix for build/UNX/Makefile_gnu has been posted in the "Bug fix" forum.

Rick Venable
computational chemist