> > pcap builds and runs fine on amd64 but there is a problem when building > > with SUBARCH=i386: it uses the wrong version of libpcap.a: > > ld -r -dp -o arch/um/drivers/pcap.o arch/um/drivers/pcap_kern.o > > arch/um/drivers/pcap_user.o -m elf_i386 > > -r /usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/../../../libpcap.a > > > Whereas the one it needs to link against is here: > > /emul/linux/x86/usr/lib/libpcap.a > > This is IMHO a Gentoo bug - I'll ask the gentoo devs, for the time being I can copy this library manually to /usr/lib32 (which is the standard location for 32-bit libs on amd64)
But the problem remains, the linker should use: -r /usr/lib32/libpcap.a and not ../../../libpcap.a which ends up as /usr/lib (which points to /usr/lib64 on standard distros) But only when building with SUBARCH=i386. So I added this statement to the Makefile (patch attached) and now all is well: +ifeq ($(SUBARCH),i386) +LDFLAGS_pcap.o := -r /usr/lib32/libpcap.a +else > Good thing, libnss_* is probably good - but don't forget /etc/nsswitch.conf > and /etc/pam.d/* - /etc/pam.conf Yep, they're all there... see: http://uml.nagafix.co.uk/SELinux/chroot/ This chroot example is here for SELinux but it applies just as well to others. I think I'll rebuild it with compartment and build su without pam to trim it down even more. > > (also lib/security so I can get into the chroot) > That's for su, right? There are some tools (including "compartment") to > combine chroot + su together. Yep, it's a shame compartment does not ship with all distros. chroot without su is pointless (since you can use 'chroot-again' to escape) changing uid/guid should really be included in chroot. > Also, I see you're using SeLinux. I don't know anything about its library > handling, and possibly it's going to make the story more difficult. It can do that... but the good thing is that it can be disabled. > However, > strace/ltrace as suggested above should diagnose any problem. Cool - I'll try that and report back. Many thanks Antoine
--- linux-2.6.15-rc6-x86-broken/arch/um/drivers/Makefile 2005-12-19 18:07:17.000000000 +0000 +++ linux-2.6.15-rc6-x86/arch/um/drivers/Makefile 2005-12-19 18:11:11.000000000 +0000 @@ -17,7 +17,11 @@ port-objs := port_kern.o port_user.o harddog-objs := harddog_kern.o harddog_user.o +ifeq ($(SUBARCH),i386) +LDFLAGS_pcap.o := -r /usr/lib32/libpcap.a +else LDFLAGS_pcap.o := -r $(shell $(CC) $(CFLAGS) -print-file-name=libpcap.a) +endif targets := pcap_kern.o pcap_user.o
