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Re: --gc-sections on x86
On Dec 5, 2006, at 4:13 AM, Gabriel Linder wrote:
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.
It seems like if you had to, you could analyze the output of nm of
the object files -- maybe even the final compiled program. nm will
tell you where symbols are defined and reference.
Perry Smith ( pedz@easesoftware.com )
Ease Software, Inc. ( http://www.easesoftware.com )
Low cost SATA Disk Systems for IBMs p5, pSeries, and RS/6000 AIX systems