Re: [ptxdist] libgcrypt fails with arm-1136jfs-linux-gnueabihf-gcc from OSELAS.Toolchain-2012.12.0

[Michael Olbrich <m.olbrich@pengutronix.de>]

Hi,

On Wed, Jan 23, 2013 at 10:33:52AM +0100, Tim Sander wrote:
> > file:
> > > file libgpg-error.so.0.5.0: ELF 32-bit LSB shared object, ARM, version 1
> > > (SYSV), dynamically linked, not stripped
> > > 
> > > The same stuff works with a OSELAS.Toolchain-2011.03.1/arm-1136jfs-
> > > linux-gnueabi toolchain. And yes i double
> > > checked that i have cleaned the working ptxdist project.
> > 
> > [build output snipped]
> > 
> > "Me, too!"
> > 
> > I had the exact same problem building with a current Xilinx-supplied
> > toolchain,
> > which is a CodeSourcery Lite 2011.09-50 toolchain for armv7 based on GCC
> > 4.6.1,
> > with ptxdist-2013.01.0. Since I didn't need that package, I simply made a
> > note
> > to try the current OSELAS toolchain later to see if it's reproducable.
> > 
> > "Good to hear" that this would likely not have helped, and there's
> > possibly an
> > issue with the package itself. My best guess right now would be a mixed up
> > order
> > of (or missing) libraries in the linking stage, but I didn't bother diving
> > into
> > the Makefile as of yet.
> I first thought it would be a hardfloat toolchain problem. But this problem also 
> occurs with the arm-1136jfs-linux-gnueabi toolchain same version. So yep it 
> seems to be a problem of the packet.

This is a bug in libgcrypt that is exposed by a change in binutils:

ac-schemes.o: undefined reference to symbol 'gpg_err_code_from_errno'

ac-schemes uses gpg_err_code_from_errno() but only links to libgcrypt.so
explicitly.
The old bahaviour was like this: libgcrypt.so links to libgpg-error.so.0,
so libgpg-error.so.0 is also used if needed.
With the new behaviour only explicitly specified libs are used, resulting
in this error.
The old behaviour can be restored by adding "-WL,--copy-dt-needed-entries"
to the ldflags (PTXCONF_TARGET_EXTRA_LDFLAGS in the platformconfig).

Michael

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