Re: [gentoo-dev] LDFLAGS & KDE ebuild

[Ned Ludd]

On Tue, 2004-04-13 at 09:48, Troy Dack wrote:
> Hi peoples,
> 	I'm presently putting together an ebuild for synce-kcemirror
> (http://synce.sourceforge.net/synce/kde/pdamirror.php).
>
> For some reason the ./configure does not seem to pass on to ld that the
> kde libs are in a non-standard location, resulting in:
>
> /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.3/../../../../i686-pc-linux-gnu/bin/ld: cannot find -lkdeprint
>
> I've managed to get it to build and install, however I don't think the
> following is really the best:
>
> src_compile() {
>     cd ${S}
>     LDFLAGS="-L/usr/kde/cvs/lib" econf || die
>     LDFLAGS="-L/usr/kde/src/lib" emake || die
> }


Please never completely override LDFLAGS= like in the above example,
the hardened use makes heavy use of them.
Instead please try.

inherit flag-o-matic

src_compile() {
	append-ldflags -L/usr/kde/cvs/lib
	...
	..
	.
}

# or the likes..
Thanks.

> So, how can I:
> 	a) work out where the kde libs are installed
> 	b) pass this nicely to ./configure and make
>
> Any advice greatly appreciated.

KDE/QT really needs to be careful with linking. I've done a rather quick
audit of ELF RPATH and KDE/QT is keeps RPATH's set to /var/tmp/portage*.
This is very bad.. If say a user would do something as silly as symlink
/var/tmp and /tmp then complete control of the system could be gained by
almost any user with half a brain. So for example.. If one were to run 
this script and find anything printed to the screen then she/he can kiss
her/his sweet arse goodbye.
http://dev.gentoo.org/~solar/audit/audit.rpath 'man 1 ld' for more info

>
> Thanks
-- 
Ned Ludd <solar@g.o>
Gentoo Linux Developer