[fpc-pascal] Documentation or compiler bug?

Michael Van Canneyt michael at freepascal.org
Sat Jul 8 10:57:10 CEST 2023

On Sat, 8 Jul 2023, Hairy Pixels via fpc-pascal wrote:

> In fact I filed a bug today which was related. Notice how I didn't use cdecl in the program but another user tried to compile and had problems with cdecl also.
> https://gitlab.com/freepascal.org/fpc/source/-/issues/40342 <https://gitlab.com/freepascal.org/fpc/source/-/issues/40342#note_1462402401>
> Basically this program:
> {$mode objfpc}
> program test;
> function printf(format: PChar): Integer; external; cdecl; varargs;

You must put the cdecl (which is the calling convention) before the external:

{$linklib c}

function printf(format: PChar): Integer; cdecl; external; varargs;

   printf('%d is the answer'#10,42)

Will work and will print

42 is the answer


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