linking error under ubuntu 12

[Daniel Graczer]

thanks, it worked

On Friday, 15 July 2016, Dmitry V. Levin <ldv at altlinux.org> wrote:

> On Fri, Jul 15, 2016 at 10:43:02AM +0800, Daniel Graczer wrote:
> > hi, I am trying to compile strace under Ubuntu 12, and it succeeds
> > initially. However if I define the USE_LIBINWIND macro in config.h.in
>
> The only supported way of enabling -k option is configure --with-libunwind.
>
> If you are editing config.h* manually, it's up to you to ensure
> correctness of your changes.
>
> > (I want to use the -k option for stack trace) the linking fails. I tried
> to
> > manually link against the libunwind library, but that library doesn't
> have
> > the functions strace is complaining about.
>
> If you manually link strace, you are doing it on your own risk.
>
> > gcc -Wall -Wwrite-strings -Wsign-compare  -g -O2   -o strace
> > strace-access.o strace-affinity.o strace-aio.o strace-alpha.o
> strace-bjm.o
> > strace-block.o strace-bpf.o strace-btrfs.o strace-cacheflush.o
> > strace-capability.o strace-chdir.o strace-chmod.o strace-clone.o
> > strace-copy_file_range.o strace-count.o strace-desc.o strace-dirent.o
> > strace-dirent64.o strace-epoll.o strace-evdev.o strace-eventfd.o
> > strace-execve.o strace-exit.o strace-fadvise.o strace-fallocate.o
> > strace-fanotify.o strace-fchownat.o strace-fcntl.o
> > strace-fetch_seccomp_fprog.o strace-fetch_struct_flock.o
> > strace-fetch_struct_statfs.o strace-file.o strace-file_handle.o
> > strace-file_ioctl.o strace-fs_x_ioctl.o strace-flock.o strace-futex.o
> > strace-get_robust_list.o strace-getcpu.o strace-getcwd.o
> strace-getrandom.o
> > strace-hdio.o strace-hostname.o strace-inotify.o strace-io.o
> strace-ioctl.o
> > strace-ioperm.o strace-iopl.o strace-ioprio.o strace-ipc_msg.o
> > strace-ipc_msgctl.o strace-ipc_sem.o strace-ipc_shm.o strace-ipc_shmctl.o
> > strace-kcmp.o strace-kexec.o strace-keyctl.o strace-ldt.o strace-link.o
> > strace-lookup_dcookie.o strace-loop.o strace-lseek.o strace-mem.o
> > strace-membarrier.o strace-memfd_create.o strace-mknod.o strace-mount.o
> > strace-mq.o strace-mtd.o strace-net.o strace-numa.o strace-open.o
> > strace-or1k_atomic.o strace-pathtrace.o strace-perf.o
> strace-personality.o
> > strace-poll.o strace-prctl.o strace-print_mq_attr.o strace-print_msgbuf.o
> > strace-print_sigevent.o strace-print_statfs.o strace-print_time.o
> > strace-print_timex.o strace-printmode.o strace-printrusage.o
> > strace-printsiginfo.o strace-process.o strace-process_vm.o strace-ptp.o
> > strace-quota.o strace-readahead.o strace-readlink.o strace-reboot.o
> > strace-renameat.o strace-resource.o strace-rtc.o strace-sched.o
> > strace-scsi.o strace-seccomp.o strace-sendfile.o strace-sigaltstack.o
> > strace-signal.o strace-signalfd.o strace-sigreturn.o strace-sock.o
> > strace-socketutils.o strace-sram_alloc.o strace-statfs.o strace-strace.o
> > strace-swapon.o strace-syscall.o strace-sysctl.o strace-sysinfo.o
> > strace-syslog.o strace-sysmips.o strace-term.o strace-time.o
> strace-times.o
> > strace-truncate.o strace-ubi.o strace-uid.o strace-uid16.o strace-umask.o
> > strace-umount.o strace-uname.o strace-userfaultfd.o strace-util.o
> > strace-utime.o strace-utimes.o strace-v4l2.o strace-vsprintf.o
> > strace-wait.o strace-xattr.o strace-xmalloc.o -L/var/tmp/libunwind/lib/
> > -lunwind libstrace.a
>
> It's obvious that the link command is wrong, your libunwind related
> changes are out of place.  I strongly encourage you to avoid linking
> strace manually and use traditional "configure && make" idiom.
> You can specify a directory containing libunwind headers and libraries
> using --with-libunwind=path-to-libunwind-directory syntax.
>
> A word to others reading this.  I understand the bug in this manually
> formed link command is trivial, but please don't fix it.  If users abandon
> supported interfaces and start issuing link commands manually,
> it's up to them to learn various features of GNU ld like --as-needed
> and how they affect linking.
>
>
> --
> ldv
>
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