On Tue, 2010-08-17 at 15:06 +0200, Gilles Chanteperdrix wrote: > Krzysztof Błaszkowski wrote: > > On Tue, 2010-08-17 at 14:40 +0200, Gilles Chanteperdrix wrote: > >> No. As witnessed by the message: > >> ./xeno-shmem-fork: relocation error: ./xeno-shmem-fork: symbol getpid, > >> version GLIBC_2.0 not defined in file libc.so.6 with link time reference > > > > > > have you seen that main process started ? and linker didn't complain > > about wrong symbol version. This happened only in child process after > > line 88, have you seen output from line 89 ? > > > > furthermore you can find commented out line in makefile which compiles > > userland without linking with xenomai libraries. > > > > this executable works as expected. > > As I said since we went from libc5 to libc6, all libcs have been > backward ABI compatible. So, it makes perfect sense that the binary works. > > Since you are calling getpid() after fork, it is normal that the error > is not signalled before, symbols are only resolved at run-time, when > they are use.
indeed so i think you should ask yourself how it was possible that main process could resolve it but child couldn't. > > > these libcs are same and i wonder whats wrong with you. > > How many times do i need to make you sure that these libcs are binary > > same ? > > As long as you are comparing the wrong binaries. What I ask you to > compare is libc.so.6 with the result of gcc -print-file-name=libc.so > gcc being the exact compiler use for compilation of the test program. > > If these libraries are the same, then I will look at your test program, > otherwise I will not waste more time on this issue. so at the box i compile code gcc gives: CHroot linux-e9um:/lib # gcc -print-file-name=libc.so /usr/lib/gcc/i586-suse-linux/4.3/../../../libc.so and i do not have gcc installed at target box (atest). i also double checked if there could be "libc.so" file in whole rootfs which is abt 258M long and i did not found it. also /usr/lib/gcc/i586-suse-linux/4.3/../../../libc.so ie /usr/lib/libc.so is just a linker script of 238 bytes. ld-linux.so.2 are binary same on these two boxes too. > -- Krzysztof Blaszkowski _______________________________________________ Xenomai-core mailing list Xenomaifirstname.lastname@example.org https://mail.gna.org/listinfo/xenomai-core