Re: Libtool does not generate shared libraries when cross compiling x86/64 -> sparc64 using fujitsu compiler

[Harald Servat]

On 02/04/2016 03:08 PM, Christian Rössel wrote:
> On 2016-02-03 18:33, Mike Frysinger wrote:
> > On 03 Feb 2016 14:30, Harald Servat wrote:
> > >     we have found that
> > >
> > >    ./configure --prefix=/tmp/test CC=fccpx --build=x86_64-linux-gnu
> > > --host=sparc64-linux-gnu
> > >
> > >     did not work. See:
> > >
> > > ...
> > > checking whether the fccpx linker (/usr/bin/ld -m elf64_sparc) supports
> > > shared libraries... no
> > > checking dynamic linker characteristics... GNU/Linux ld.so
> > > checking how to hardcode library paths into programs... unsupported
> > > checking for shl_load... no
> > > checking for shl_load in -ldld... no
> > > checking for dlopen... yes
> > > checking whether a program can dlopen itself... cross
> > > checking whether stripping libraries is possible... yes
> > > checking if libtool supports shared libraries... no
> > >
> > >     However, the system support suggested to add the flag -Xg into the
> > > Fujitsu compiler and we found that the following configure did work.
> > >
> > > ./configure --prefix=/tmp/test CC=fccpx --host=x86-linux CFLAGS="-Xg"
> > >
> > > checking whether the fccpx linker (/usr/bin/ld) supports shared
> > > libraries... yes
> > > checking whether -lc should be explicitly linked in... no
> > > checking dynamic linker characteristics... fccpx: warning:
> > > -print-search-dirs is unrecognized option. This option is passed to the
> > > linker.
> > > usage: fccpx [options] files.
> > > GNU/Linux ld.so
> > > checking how to hardcode library paths into programs... immediate
> > > checking for shl_load... no
> > > checking for shl_load in -ldld... no
> > > checking for dlopen... yes
> > > checking whether a program can dlopen itself... cross
> > > checking whether stripping libraries is possible... yes
> > > checking if libtool supports shared libraries... yes
> > >
> > >     So that works for the small test example I generated. However, when
> > > passing the same flags to the application we want to build, then the
> > > libtool still claims it does not support shared libraries. So there are
> > > couple of questions then: any idea on why this larger case the addition
> > > of CFLAGS and --host does allow libtool to generate shared libraries?
> > > And, I don't have direct access to the system, but can I do something to
> > > improve the support on this system?
> >
> > i don't know what "fccpx" is, but i'd guess that libtool just doesn't
> > understand how it works.  please attach the config.log file from that
> > run.
>
> fccpx/fcc are the Fujitsu C compiler commands: "There  are two types of
> compile commands, one is the cross compile command that is fccpx, and
> the other is the own compile command  that  is fcc."
>
> I got in contact with them on Fujitsu supercomputer like K Computer and
> FX10 systems. With fccpx you cross-compile on a x86_64 login node for
> sparc64 compute nodes. fcc generates code for the x86_64 login node.
>
> You are right, libtool doesn't understand neither fccpx nor fcc nor the
> C++ and Fortran variants. I talked to Fujitsu but they are not eager to
> contribute to libtool.

Thank you for the information Christian. We're running these experiments 
in K computer. Since Mike requested the config.log, I'm adding the 
config.log for the bfd/ subdir within the binutils 2.24 package.

I'm unsure on how to interpret the libtool related information because 
it is very simplistic

configure:11699: checking if libtool supports shared libraries
configure:11701: result: no

however, at some point earlier, the following test might be related

configure:8998: checking whether the fccpx linker (sparc64-linux-ld -m 
elf64_sparc) supports shared libraries
configure:10069: result: no

Can we provide some additional info or run additional tests to improve 
libtool on this system?

Best,

> Christian
>
> > -mike
> >
> >
> >
> > _______________________________________________
> > https://lists.gnu.org/mailman/listinfo/libtool


WARNING / LEGAL TEXT: This message is intended only for the use of the
individual or entity to which it is addressed and may contain
information which is privileged, confidential, proprietary, or exempt
from disclosure under applicable law. If you are not the intended
recipient or the person responsible for delivering the message to the
intended recipient, you are strictly prohibited from disclosing,
distributing, copying, or in any way using this message. If you have
received this communication in error, please notify the sender and
destroy and delete any copies you may have received.

http://www.bsc.es/disclaimer

binutils-bfd-config.log
Description: Text Data