F_CLOEXEC should be set with F_SETFD, not F_SETFL.
Fixes http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=696249
Merge branch 'master' of github.com:cooperative-computing-lab/cctools

* 'master' of github.com:cooperative-computing-lab/cctools:
  Fix if/then in configure for debian.