I have generated, HPP and OBJ, Gtfrxportintf unit(.pas). but I try to use in the CPP, I got this error.

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I have generated, HPP and OBJ, Gtfrxportintf unit(.pas). but I try to use in the CPP, I got this error.

[ILINK32 Error] Error: Unresolved external '__fastcall Gtfrxportintf::TgtFRExportInterface::RenderDocument(Frxclass::TfrxReport *, bool, bool)' referenced from C:\USERS\MANIKATA\DOCUMENTS\EMBARCADERO\STUDIO\PROJECTS\WIN32\DEBUG\UNIT1.OBJ

Please advise.

Comments

  1. David MillingtonMarch 8, 2016 at 4:09 AM

    This is a reporting library of some sort (FastReports?)? Have you contacted their support? They will have people using C++Builder.

    Things to try:
    * Check that a method with that signature (in Pascal) exists in the TgtFRExportInterface source code (i.e., check that the HPP and the .pas align correctly.)
    * Run tdump over the library BPL, and grep the results for that method. Compare the signatures. Are they different in a way that the linker will identify them as different methods?
    * Do you need a #pragma  link in order to link the library in?

    Questions:
    * What library is this?
    * What Delphi and C++ version is this?
    * Unit1 implies you can reproduce this easily. Can you give instructions for a simple reproducing project?
    * Are you linking statically or dynamically, and do you have the right packages set up?

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  2. David MillingtonMarch 8, 2016 at 4:12 AM

    By the way, there is a C++Builder Developers community too. It's not as active as the Delphi one, but it could be worth posting there - you may find more people who are familiar with C++.

    https://plus.google.com/communities/118315259185736124693

    This kind of issue is usually resolved by making sure you have the right things to link to, either packages in the project options, or a manual pragma link.

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