Calling RPGILE program from C++

Hi, folks.
There was a similar discussion recently, but for C.
I know how to call an RPG program from my C program.
I write
....
#pragma map(RetrSC, "RSC10R")
#pragma linkage(RetrSC, OS)
void RetrSC (char *, char *, scpf *, char *) ;

main()
{
...
RetrSC(Key, "CHAIN", &Account, &Ind).

}

works fine.

Decided to experiment with C++
Manual says that #pragma linkage is not supported.
In an example I found that it should look like this:

#pragma map(RetrSC, "RSC10R")
extern "RPG" void RetrSC (char *, char *, scpf *, char *) ;

main()
{
...
RetrSC(Key, "CHAIN", &Account, &Ind).

}

RSC10R is not a service program, just a *PGM object.
Create module works fine, however CRTPGM generates CPD5D02:
No definition was found for reference RSC10R in *MODULE

What should I do to be able to call an RPG program from C++ the same
way I do it from C?

I believe that it should be pretty simple, but I've already spent 3
hours searching in the manuals and googling....

TIA,

Jevgeni.