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Loading third party shared libraries needed by custom C-code function used in Verilog-A with CDS_VA_DPI

Herge

Description of the problem

  • A verilog-A block calls a custom C-code function through the CDS_VA_DPI interface.
  • The C-code function relies on third-party shared libraries to perform calculations.
  • The custom code with the function referenced in VerilogA is compiled w/o errors using the mmsim_genplugin.sh script.
  • After compilation by mmsim_genpluging.sh, several symbols still remain "undefined" because I am relying on the third party libraries to provide them.

Question

  • How can I get Spectre to load the third-party libraries and have the corresponding symbols available to my custom C-code function that will be called by my VerilogA module  ?
  • Should I use the cmiConfig scripts to set the search path for third party libraries and load them ? Or is this interface only for libraries complying to the CMI  API (i.e. providing certain specific functions which are target entry points, instead of having all public symbols loaded) ?
  • Should I use the Spectre netlist statement "ahdl_include <third_party_library_path> -cds_va_dpi" ?
  • Is there a difference between the effect of loading libraries through cmiConfig or using the CDS_VA_DPI mechanism ?

Thanks.

 

  • Andrew Beckett

    Wild guess without having actually tried the - I would expect you just need to have the directory containing the shared libraries in $LD_LIBRARY_PATH. Does that work?

    Andrew

  • Herge
    in reply to Andrew Beckett

    OK, I cared to have all the lib paths defined in the GNUMakefile generated by mmsim_genplugin.sh, but did not check that it was passed to Spectre.

  • Andrew Beckett
    in reply to Herge
    Herge said:
    OK, I cared to have all the lib paths defined in the GNUMakefile generated by mmsim_genplugin.sh, but did not check that it was passed to Spectre.

    Are you saying it worked if you set $LD_LIBRARY_PATH before running Spectre?

    Regards,

    Andrew

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