Bug fix: would not work if ROLLCOMPILER was unspecified.
Bug fix: failed if ROLLCOMPILER was unspecified.
Clean up.
Correct module path.
Make consistent with other rolls.
Get rid of leftover reference to src/build-
Match only first occurrence when searching for module file--avoids spurious
failure if /etc/profile.d/modules.sh is invoked twice.
Avoid warning message from find.
Fix syntax error.
Generalize for different/multiple compilers.