Re: BORLAND C++

[Brian Gough <bjg at network-theory dot co dot uk>]

Santiago Calderon writes:
 >  In the Borland C++ compiler is the some as far as I know.
 >  When you build the dll you must define this variables as
 > __declspec(dllexport)
 >  and when you write an application that use the dll you must define
 > the variable in you include files as __declspec(dllimport)
 >  I suppose that to solve that definitively , the source of the
 > library should be modified so that the dll knows about these
 > variable to be exported using the __declspec(dllexport) and when we
 > use it in the program using the __declspec(dllimport), at least to
 > do it fully compatible with Borland compiler (and perhaps MSCV??).

There's a perl script in msvc/mkdllheaders.pl which I've been using
to add this to the headers of the Windows version.

regards
Brian


#!/usr/bin/perl

while (<>) {
    if (/^extern/ && !/^extern inline/) {
        $a = $_; $a =~ s/^extern/__declspec(dllexport)/;
        $b = $_; $b =~ s/^extern/__declspec(dllimport)/;
        print "#ifdef GSL_EXPORTS\n";
        print "$a";
        print "#elif defined(GSL_IMPORTS)\n";
        print "$b";
        print "#else\n";
        print "$_";
        print "#endif\n";
    } else {
        print;
    }
}