How to apply gprof on gcc?

[Ben Elliston]

James E Wilson <wilson@specifixinc.com> writes:

> You could try doing a gcov profile instead of a gmon profile.  gcov
> has some support for merging together info from multiple runs.
> Hence you may get more useful info this way.

You don't need to override BOOT_CFLAGS or anything special to make
this work.  I recently discovered gcc's configure option:

  --enable-coverage=LEVEL
                          enable compiler's code coverage collection.
                          Use to measure compiler performance and locate
                          unused parts of the compiler. With LEVEL, specify
                          optimization. Values are opt, noopt,
                          default is noopt

Ben