Optimization across translation units

[Brian Budge]

On Wed, Apr 27, 2011 at 7:34 PM, richard Cavell <richardcavell@mail.com> wrote:
> Hi everyone.
>
> For manageability, I have broken up one source file that was 1500 lines long into several that are each a couple of hundred lines long.  Now my executable is bigger.  In order to make it work I had to take some functions that were static and make them non-static (and extern them in a .h file).  It is obvious that the compiler is no longer able to optimize as much.
>
> Does anyone have any ideas on how to get decent optimization where a function is calling a function in a different translation unit?
>
> Richard
>


You should look into link-time optimization (LTO).  I think this is
supported in the more recent versions of gcc.

  Brian