2015-12-04 18:31, Adrien Mazarguil: > On Fri, Dec 04, 2015 at 06:11:03PM +0100, David Marchand wrote: > > The initial problem has been seen while building mlx4 pmd as a shared > > library > > on Ubuntu 14.04 (gcc 4.8.4-2ubuntu1~14.04). > > > > Resulting .so will lack the DT_NEEDED entry for libibverbs: > > > > marchand at ubuntu1404:~/dpdk$ ldd ./build/lib/librte_pmd_mlx4.so > > linux-vdso.so.1 => (0x00007fff87ebb000) > > libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f2ced21a000) > > /lib64/ld-linux-x86-64.so.2 (0x00007f2ced821000) > > > > And trying to load it in testpmd triggers this error: > > > > [...] > > EAL: librte_pmd_mlx4.so: undefined symbol: ibv_query_port > > [...] > > > > After some strace, the problem comes from the --as-needed option passed to > > the > > linker. > > > > It is safer to specify libraries we depend on after the objects we are > > linking > > into a shared library, especially when the linker is invoked with options > > like > > --as-needed. > > > > Fixes: bef06a8a0655 ("mk: set library dependencies in shared object file") > > > > Signed-off-by: David Marchand <david.marchand at 6wind.com> > > --- > > > > Changes since v1: > > - added some details in commitlog since Thomas does not like "safer" > > argument :-)
Yes, that's better justified with these details :) > Obvious issue that did not show up in our tests under Debian. > > Acked-by: Adrien Mazarguil <adrien.mazarguil at 6wind.com> Applied, thanks