--gc-sections on x86

[Gabriel Linder]

Brian Dessent wrote:
> This testcase may not be actually showing you what you want.  You have
> to balance the extra overhead of having a section for each function
> against the savings, and in this case the function being removed is
> completely trivial.  When you're looking at a 2800 byte ELF file the
> noise (headers, padding, etc) is going to overwhelm everything.  Try a
> more realistic testcase.
Well, that was a trivial testcase, as you said. In real life I have a 
lot of .c files with generic functions, but not all of them are used by 
all binaries I build. So I search for a way to clean out unused 
functions between modules, if possible.

The --gc-sections trick was found after some search, I found also a "set 
inline function size to 0 and enable inlining" hint (on RedHat lists, if 
I remember correctly) but none of them works.