Profiling a build

[Benny Siegert <bsiegert%netbsd.org@localhost>]

Hi!

I would like to profile a build that takes about 2-3 hours on my Raspberry 
Pi. The build does not use Make.

The questions I would like to answer are:

1. How much time is spent waiting for I/O?
2. How much time is spent in the various processes? i.e. compiler, linker, 
test binaries.

Should I be looking at dtrace for that? Or is there something simpler?

--
Benny