Sorry for the Ada content herein but I have to cross-bother *someone*. 8^) I'm trying to get a simple Ada program to access simple Pascal code-- see bottom of this post. (I also want to call Ada code from Pascal, but I haven't tried that yet.) I've read "6.11.2 Exporting GPC Libraries to Other Languages" from the GPC docs and "2.10.1 Interfacing to C" in the GNAT docs. I _think_ that I can prepare the Pascal code and call it from Ada assuming C calling conventions; at least, that's what I'm trying. The command lines that I am using, with the working directory the one containing all the source files, are: gpc -c mypascalunit.pas -o mypascalunit.o gnatmake adacallspascal.adb -largs mypascalunit.o /Developer/Pascal/ gpc344d2/lib/gcc/powerpc-apple-darwin8/3.4.4/libgpc.a (the gnatmake command is all one line) This causes the following output (sorry if there are any impolite line breaks): gcc -c adacallspascal.adb gnatbind -x adacallspascal.ali gnatlink mypascalunit.o /Developer/Pascal/gpc344d2/lib/gcc/powerpc- apple-darwin8/3.4.4/libgpc.a adacallspascal.ali ld: Undefined symbols: _frommypascalunit gnatlink: cannot call /usr/bin/gcc gnatmake: *** link failed. I'm linking libgpc.a because I think that is the GPC runtime library and prevents complaints about undefined symbols such as __p_Write_String. Question: Why doesn't the linker see _frommypascalunit??? Here are the two programs, Ada main and Pascal unit. with Ada.Text_IO; use Ada.Text_IO; procedure adacallspascal is procedure frommypascalunit; pragma Import(C, Frommypascalunit); begin Put_Line("Hello from adacallspascal."); frommypascalunit; end adacallspascal; unit mypascalunit; interface procedure frommypascalunit; implementation procedure frommypascalunit; begin writeln('Hello from frommypascalunit.'); end; end. Thanks for any comments at all. I've never tried anything like this. Jerry