Le 26/11/2012 09:06, Pierre Labastie a écrit : > First, I confirm that without any flag, everything went well. Actually not: I had forgotten to remove LDFLAGS=-lpthread from the configure command, which I had added for testing.
So the error is still there. I think I have found the reason. After gcc-pass2, using the dummy.c as in the book, try: gcc -v -Wl,--verbose dummy.c -lrt 2>&1 | grep '\( \|usr\)/lib' I get: found libpthread.so.0 at /lib/x86_64-linux-gnu/libpthread.so.0 (see 'at /lib/...' instead of 'at /tools/lib/...') I think people who have a recent enough version of libpthread on the host won't notice it. But libpthread on Debian is part of glibc, which is eglibc-2.13, and it seems that __pthread_get_minstack@GLIBC_PRIVATE has been added later. That's why I get the error: /mnt/lfs/tools/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.7.2/../../../../lib64/librt.so: undefined reference to `__pthread_get_minstack@GLIBC_PRIVATE' Note that without the syntax error in putenv.c in the 'check-0.9.9' source, I would not have noticed that either... I have tried to investigate slightly more: Looking at ld/config.status in the binutils-build tree (pass2), I found: sys_lib_search_path_spec='/mnt/lfs/tools/lib/gcc/x86_64-lfs-linux-gnu/4.7.2 /mnt /lfs/tools/lib/gcc /mnt/lfs/tools/lib64 /mnt/lfs/tools/x86_64-lfs-linux-gnu/lib ' sys_lib_dlsearch_path_spec='/lib /usr/lib /usr/lib/atlas /lib/i386-linux-gnu /usr/lib/i386-linux-gnu /lib/i486-linux-gnu /usr/lib/i486-linux-gnu /usr/local/lib /lib/x86_64-linux-gnu /usr/lib/x86_64-linux-gnu /lib32 /usr/lib32 ' So I think that the search path for libraries is OK, except when a library is (d)loaded from an another one (libpthread from librt in this case). However, I browsed the configure script, and it seems that '/lib /usr/lib' is hardcoded in sys_lib_dlsearch_path_spec. Maybe there is a way to avoid that, but that I have not found. Anyway, I think that makes the toolchain not completely independant from the host and that it is an issue which should be somehow addressed in the book. Regards Pierre -- http://linuxfromscratch.org/mailman/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
