![](/images/backgrounds/286549/hp-sunsoft-pascal-4-0-users-manual-549395111x1.png)
5
The module unit, ext_mod.p
The include file, extern.h
The commands to compile and execute ext_prog.p and ext_mod.p
module ext_mod;
define
global, proc;
%include "extern.h";
procedure proc;
begin
writeln('From PROC : ',global); global := global + 1;
end; { proc }
var
global : extern integer;
procedure proc; extern;
hostname% pc
ext_mod.p: Linking: hostname% a.out
From MAIN, before PROC: 1
From PROC : 1
From MAIN, after PROC: 2
Sharing Declarations in Multiple Units
Using extern and external directives for procedure and function declarations, you can optionally specify the source language of a separately compiled procedure or function. For example, extern fortran directs the compiler to generate calling sequences compatible with the FORTRAN compiler from SunSoft. Then, external c directs the compiler to generate calling sequences compatible with SunSoft C compiler.
Separate Compilation | 87 |