Re: [MacPerl-Modules] Building module : one step further

[Arved Sandstrom <Arved_37@chebucto.ns.ca>]

At 07:07 PM 3/8/00 +0100, Fran=E7ois LETELLIER wrote:

>I read the tutorials about building a perl module embedding C code... and
>went a step further.
>
>BTW, the tutotial (mpxstut) is not accurate on a couple of points :
>1/ I found no way to use h2xs_app.plx to actually process a .h file. It's
>OK to get a skeleton, but otherwise ???
>2/ h2xs_app.plx needs to find mac_h2xs in @INC.
>3/ xsubpp has to be extensively edited to modify the paths it contains
>($xsubpp, @options to find the typemaps, ...)

I'd have to review the tutorial, but I do recall that there is no explicit=
=20
or implicit encouragement for the use of the h2xs feature that allows for=
=20
parsing of C source and header files. This relies on C::Scan, which has not=
=20
been ported to MacOS (and is a bit of a pain). In general, use of h2xs to=
=20
get skeletons is the currently supported option on MacOS.

As far as point #2, well, yes. I think this is mentioned.

I'd have to check, but there should be a version of xsubpp with the=20
distribution that already has all these edits made.

>Well, after struggling with the above, I eventually went to *compiling* th=
e
>C code generated by xsubpp. CodeWarrior reports 100 errors (my C code is 3
>lines long), due to dupplicate definitions of #defines or typedefs.
>Obviously, some .h files are included twice or - what is worse - some of
>them define the same things, but don't have compliant "include guards".
>
>Looks like CW includes files as <cstdio> in place of <stdio.h> for instanc=
e.
>
>Does anyone know how to overcome this nightmare, without editing all the .=
h
>files to place proper include guards ??

What are you trying to XS? And as I suggested, don't use h2xs to run over=
=20
existing headers - prepare the initial XS by hand.

Arved

P.S. I intend to review the tutorial and distribution with respect to these=
=20
points; if nothing else they are not discussed in a clear enough manner.



=3D=3D=3D=3D Want to unsubscribe from this list?
=3D=3D=3D=3D Send mail with body "unsubscribe" to macperl-modules-request@m=
acperl.org