[Running a C program from PHP]

Hi all
We need to compile a C program from PHP environment
and to execute the object file of the program.
  We used PHP system commands writing system('cc
programname.c -o objectfile') and
system('./objectfile').It works for small program(we
checked) but
in our application it was able to compile but failed
to run the objectfile.The object file when executed
should give a large(23 MB) binary file.The program is
working properly from the terminal provided we write
the command ' limit stacksize unlimited' before
running the program.The same command 'limit stacksize
unlimited' we tested in PHP but we did not get the
result.
Is it feasible in PHP or we r wrong somewhere? Can u
all please help??
                  Basab Goswami