PATCH: Support LD_SYMBOLIC and LD_SYMBOLIC_FUNCTIONS
H. J. Lu
hjl@lucon.org
Tue Jan 30 15:59:00 GMT 2007
On Tue, Jan 30, 2007 at 03:08:04PM +0000, Nick Clifton wrote:
> Hi H.J.
>
> >>I tried it and gave up. With an environment variable, I just need
> >>to do
> >>
> >># LD_SYMBOLIC_FUNCTIONS=1 rpmbuild --rebuild
> >>openoffice.org-2.0.4-5.5.10.src.rpm
>
> But you do not have -Bsymbolic-functions in your spec file, so if you
> forget this trick in the future and rebuild the openoffice.org binaries
> again you will miss out on the optimization. With this new feature
> restricted to the -Bsymbolic-functions command line switch users that
> want it are forced to do the right thing and add it to the spec file.
>
> >>With an environment variable, you can add
> >>
> >>export LD_SYMBOLIC_FUNCTIONS=1
> >>
> >>to openoffice.org.spec and you just need to do
> >>
> >># rpmbuild -ba openoffice.org.spec
> >>
> >>You don't have to change sources of Open Office.
>
> Right, but then adding a new command line switch does not require that
> the sources be changed either.
>
Then you need a linker wrapper. I don't see it any better than
an environment variable.
Can you try to build binutils itself with -Bsymbolic-functions? I
just add
export LD_SYMBOLIC_FUNCTIONS=1
in binutils.spec and I am done. It will use the new feature if
your linker supports it. If your linker doesn't, no harm is done.
The best of all is I don't have to change anything in binutils.
H.J.
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