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Status Not under consideration
Workspace C/C++ and Fortran Compilers
Categories Fortran
Created by Guest
Created on Feb 10, 2019

RELATED IDEAS

XLF: request support for -shared flag consistent with the XLC usage

See this idea on ideas.ibm.com

The XLC compiler accepts the "-shared" flag as an alias to "-qmkshrobj" to create shared object (.so) files, but the XLF compiler does not.

The XLF option -shared is not documented but is not identified as invalid when it is used. Using -shared does not produce a shared object (readelf -h a.out | grep Type:) but produces an executable file that seems to be missing some symbol table info that would be included in a normal executable.

When building applications from multiple source languages (C and Fortran) the common build process (configure/make) may pass common flags to both compilers.

Is there a reason why XLC accepts -shared while XLF does not?
Please consider providing the -shared flag as an alias to -qmkshrobj for XLF that is consistent with the XLC compiler.
If there is a need for a unique implementation of -shared for XLF, could you please provide documentation for its use?

Idea priority Low
  • Guest
    Reply
    |     Apr 20, 2020

    Hi Roy,

    Apologies for the delay in our response.

    As you mentioned, -shared is not documented in the XL Fortran Linux guide as it was not implemented in XL Fortran.

    The -shared object was likely introduced in XLC only for gcc porting compatibility.

    For XL Fortran, we would like clients to use -qmkshrobj.
    There would be a significant effort to get -shared working with XLF; and considering there's already a documented option, we will be canceling this RFE.

    Feel free to let us know if you have any further concerns.

  • Guest
    Reply
    |     Mar 24, 2020

    Its now been 13 months since this RFE was created. I would think that an evaluation wouldn't take that long. End users are expecting -shared to work and it gets interpreted as -s -h -a -r -e -d which does bad things (-s is strip all symbols)!

  • Guest
    Reply
    |     Jul 16, 2019

    It's been 5 months since this RFE was created and there have been no updates. Can you please provide an update on the evaluation of this RFE?

  • Guest
    Reply
    |     Apr 8, 2019

    This RFE is being investigated further.

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