Bug#387464: marked as done (ftplib-dev: libftp.a can not be used on amd64)
Your message dated Sat, 16 Sep 2006 15:10:52 +0200
with message-id <20060916131051.GA13483@ouaza.com>
and subject line ftplib-dev: libftp.a can not be used on amd64
has caused the attached Bug report to be marked as done.
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If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--- Begin Message ---
Package: ftplib-dev
Version: 3.1-1-6
Severity: serious
Architecture: amd64 (x86_64)
I get error when compiling with libftp.a: (g++-4.1 -shared myftp.c -lftp -fPIC -o libmyftp.so)
/usr/bin/ld: libftp.a(ftplib.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
It makes package completely unusefull on amd64
---------------
kernel: linux-image-2.6.17-2-amd64 2.6.17-7
libc6: 2.3.6-15
---------------
Best Regards
Sergey Nivarov
--- End Message ---
--- Begin Message ---
On Thu, 14 Sep 2006, Sergey Nivarov wrote:
> Package: ftplib-dev
> Version: 3.1-1-6
> Severity: serious
> Architecture: amd64 (x86_64)
>
> I get error when compiling with libftp.a: (g++-4.1 -shared myftp.c -lftp -fPIC -o libmyftp.so)
> /usr/bin/ld: libftp.a(ftplib.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
>
> It makes package completely unusefull on amd64
I don't think that the package is at fault. The .o inside the .a are
effectively compiled without -fPIC as they should, so that one can
link them into an application.
Here you're compiling a shared library and you should not use the .a file
but rather link to the .so.
The command line above on a clean install, effectively link the package
with the so and it works well:
(sid) rhertzog@rivendell:~/tmp$ g++-4.1 -shared myftp.c -lftp -fPIC -o libmyftp.so
(sid) rhertzog@rivendell:~/tmp$ ldd libmyftp.so
linux-gate.so.1 => (0xffffe000)
libftp.so.3 => /usr/lib/libftp.so.3 (0xb7fbf000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb7ee0000)
libm.so.6 => /lib/tls/libm.so.6 (0xb7ebb000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb7eb0000)
libc.so.6 => /lib/tls/libc.so.6 (0xb7d7e000)
/lib/ld-linux.so.2 (0x80000000)
To reproduce the error message that you give one must link explicitely to
the .a:
# g++-4.1 -shared myftp.c /usr/lib/libftp.a -fPIC -o libmyftp.so
/usr/bin/ld: /usr/lib/libftp.a(ftplib.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC
(Thanks to Sam Hocevar who made the test on amd64)
It's possible to you deleted the /usr/lib/libftp.so symlink or that you
modified it by error. However the amd64 package its fine.
Thus I'm closing this bug.
Cheers,
--
Raphaël Hertzog
Premier livre français sur Debian GNU/Linux :
http://www.ouaza.com/livre/admin-debian/
--- End Message ---
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