HiI experience problems linking using "external" keyword on Mac OS X. Program with declaration like
procedure glVertex3f(x, y, z: Single); cdecl; external 'GL' name 'glVertex3f';
fails to compile with $ fpc external_decl.pas /usr/bin/ld: Undefined symbols: _glVertex3f Error: Error while linking(note the strange underscore at the beginning of reported "_glVertex3f").
Similar problems seem to arise with gtkglext unit under Mac OS X. What's interesting is that the problems are gone if I add {$linklib GL} (in case of glVertex3f example). So it seems to me that under Mac OS X
1. the name of the library specified after "external" keyword is ignored
2. I have to link to libraries using {$linklib xxx} method
This is what gtk2 unit uses, and it links OK with GTK library from
fink. Also construct like
function sem_post(__sem:Pointer): LongInt; cdecl; external 'c' name
'sem_post';
works OK in FPC's RTL, I guess that somewhere in Darwin RTL there's
included {$linklib c}.
Am I right ? Is this a known limitation of FPC for Mac OS X, or should I submit to bugtracker ?
I'm attaching the small testcase. Michalis
external_decl.pas
Description: Binary data
_______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
