Dear PPL developer,

Following the instructions in the config.log from configuring PPL-0.11 for updating gcc on a linux machine running Redhat Linux OS version 5.4, I am reporting that there were warnings on the following five header files:

(1) fenv.h

(2) getopt.h

(3) signal.h

(4) sys/resource.h

(5) sys/time.h

The warning messages were: “present but cannot be compiled\n check for missing prerequisite headers?\n see the Autoconf documentation\n section "Present But Cannot Be Compiled"\n proceeding with the compiler's result\n”

Your attention will be appreciated.

Sincerely,

Paul

Dr. Paul Livingstone

Staff Air Pollution Specialist

California Air Resources Board

Sacramento, CA 95812

Phone: (916) 327-8543