将BPL与在其他BPL中实现的组件一起安装

Question

I am using C++ Builder 10 Seattle and i am trying to install a component package which registers components that are implemented in a different bpl.

Technically i have done this:

I created two packages. One is defined as runtime only (comps.bpl), the other is for design time (compsIDE.bpl). All components I implemented my self are contained in the runtime lib. In the package for design time I included the fcomps.bpi and add a Unit called compsreg.cpp. In the Unit I use the following code to install components from comps.lib:

#include "MyComponent.h"

namespace comps
{
    void __fastcall PACKAGE Register()
    {
        TComponentClass classes[1] = {__classid(TMyComponent)};
        RegisterComponents("MyComponents", classes, 0);
    }
}

The problem is that the components doesn't get installed. I use the same technique for Delphi units, which are also included in the comps.bpl and they get installed.

Has anybody an idea why the Register method don't register the components? I think the only reason can be that the method never gets called for C++ but for Delphi...

Hoping for your help... Kerem

Answer 1

add a Unit called compsreg.cpp

This is the root of the problem. The namespace in the file MUST match the filename, otherwise the IDE will not be able to find the exported Register() function correctly. You need to change namespace comps to namespace compsreg instead.