[arch-general] Prelink/Preload

[Nick Stepa]

On Tue, Feb 02, 2010 at 09:30:47AM +0530, Nilesh Govindarajan wrote:
> On 02/01/2010 05:41 PM, Allan McRae wrote:
> >On 01/02/10 21:57, Shridhar Daithankar wrote:
> >>On Monday 01 February 2010 16:09:08 solsTiCe d'Hiver wrote:
> >>>prelink modifies binary and library to ... prelink ;-) them. during the
> >>>days of kde 3 I noticed a significant improvement in loading time of
> >>>applications. I have dropped its use (prelink ... and kde3) because some
> >>>recent binutils(or gcc or i don't remember) feature is supposed to do
> >>>almost the same thing [ref. needed]
> >>
> >>A long time back(seems like eternity) I wrote a small post describing GNU
> >>hash options in linker at http://dhoomketu.net.in/node/34.
> >>
> >>I cannot find the spec file in the arch GCC package anymore but the
> >>binaries
> >>do contain GNU hash section. Just run readelf on any binary, like
> >>/bin/ls and
> >>look for .gnu.hash.
> >>
> >>If the gcc package forces linker option to be GNU hash style only(I
> >>don't know
> >>how to verify this on arch), it could achieve the speed improvement
> >>and reduce
> >>the binary size somewhat as well.
> >>
> >>I guess most of that is already used by now except for forcing the GNU
> >>hash-
> >>style only.
> >
> >The gcc package uses --hash-style=both by default, but the default
> >LDFLAGS for makepkg overrides this with --hash-style=gnu
> >
> >Allan
> >
> 
> Well, I'm bumping this thread, but I have a doubt. When we run
> prelink, prelinking is permanent or has to be done at every boot ?
> 
> -- 
> Nilesh Govindarajan
> Site & Server Adminstrator
> www.itech7.com


I think, prelink is permanent.