Date: Tue, 28 Oct 2008 19:13:35 +0100 From: Alexander Leidinger <Alexander@Leidinger.net> To: "Daniel O'Connor" <doconnor@gsoft.com.au> Cc: pisymbol@gmail.com, olli@lurza.secnetix.de, freebsd-hackers@freebsd.org, wojtek@wojtek.tensor.gdynia.pl, freebsd-questions@freebsd.org, "M. Warner Losh" <imp@bsdimp.com> Subject: RTLD changes for non-native system (was: Re: Why does adding /usr/lib32 to LD_LIBRARY_PATH break 64-bit ?binaries?) Message-ID: <20081028191335.26152gicr4ni54ys@webmail.leidinger.net> In-Reply-To: <200810281018.18786.doconnor@gsoft.com.au> References: <freebsd-hackers.79409.1224892331.200810250958.15130.doconnor@gsoft.com.au> <200810271411.m9REB6te015188@lurza.secnetix.de> <20081027.090116.-1827344390.imp@bsdimp.com> <200810281018.18786.doconnor@gsoft.com.au>
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Quoting Daniel O'Connor <doconnor@gsoft.com.au> (from Tue, 28 Oct 2008 =20 10:18:10 +1030): > On Tuesday 28 October 2008 01:31:16 M. Warner Losh wrote: >> In message: <200810271411.m9REB6te015188@lurza.secnetix.de> >> >> Oliver Fromme <olli@lurza.secnetix.de> writes: >> : Daniel O'Connor wrote: >> : > On Friday 24 October 2008 23:20:59 Peter Jeremy wrote: >> : > > > this will make system trying to bind 32-bit libs to 64-bit >> : > > > program. it can't work >> : > > >> : > > rtld shouldn't attempt to bind 32-bit libs to 64-bit programs. >> : > >> : > The same problem happens with the Linux run time linker - it merrily >> : > tries to link FreeBSD libraries to Linux binaries with predictable >> : > results.. >> : >> : You *can* link Linux libraries with FreeBSD binaries (and >> : vice versa), if the library does not perform any syscalls, >> : e.g. it is a pure computation library or similar. >> : >> : > That said it would be really nice if it ignored incompatible librari= es >> : > :) >> : >> : No. Please don't put such pseudo-cleverness into rtld. >> : It wouldn't be an improvement, in fact it might break some >> : working configurations. >> >> Yes. I have a bunch of printer drivers that I've used that link in >> linux shared libraries... They are in ports... > > Good point.. > The problem is really the Linux linker - it will find a FreeBSD library an= d > try and use it ahead of a Linux one later in the search path - this preven= ts > stuff working :) > > I have this exact problem with libfontconfig and Xilinx ISE. > > Perhaps instead of ignore, use last.. But then it doesn't really matter fo= r > the FreeBSD linker - I imagine I would have to convince Linux folks it's a > good idea. Please ignore for a moment that we are not talking about changing the =20 FreeBSD RTLD anymore: Would it make sense (for us and/or for GNU) to first search for libs =20 for the current system and if none are found to try the others? Bye, Alexander. --=20 There is hardly a thing in the world that some man can not make a little worse and sell a little cheaper. http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID =3D B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID =3D 72077137
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