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My basic test case "jsub php5 -v" doesn't work in tools project.

johang@tools-dev:~$ cat php5.err 
libgcc_s.so.1 must be installed for pthread_cancel to work

Yet, "php5 -v" runs fine when I log in to an exec instance and run it manually.

"libgcc_s.so.1 must be installed for pthread_cancel to work" is an (obscure) indication that the job runs out of memory on start-up (cf. [[wikitech:Nova Resource:Tools/Help#Why am I getting errors about libgcc_s.so.1 must be installed for pthread_cancel to work?]]).  You need to request more memory with the "-mem" option, e. g. "jsub -mem 350m php5 -v".