Hi
I've tried to automate my compiling, so I decided to write a small program.
But I can't find anything like C system() function to pass something to the
OS. How can I do it?
Thanks

"Carlos" <carlos8294@msn.com> wrote in message news:abuv1c$tn1$1@digitaldaemon.com...
> Hi
> I've tried to automate my compiling, so I decided to write a small
program.
> But I can't find anything like C system() function to pass something to
the
> OS. How can I do it?
> Thanks

Just call the C one:

    extern (C) int system(char *);

There seems to be a heavy reliance on C (and why shouldn't there be), which means a whole load of externs need to be written. It'd by nice if someone wrote a library or two with all the common ones, just to get things up an running. Or perhaps have it as an optional automatic IDE/Complier task that would recognise common C lib functions (by scanning .h files) and add them in.

I know it says in the D docos that D is speedup by not scanning header files, but perhaps a separate tool could be written that would only need to be run (by the programmer) when a new C extern function was added.  I'd be willing to have a go at that when I get some spare time (not likely), and if there's much demand for it.

I know D want's to keep separate from C, but something to help stop reduce extra so called, dirty code would be good.

PS - I'll probably get flamed for this, but adding an externs doubles the amount of code needed if you only make one call to system (or any other external function).

Me-page
www.hohums.tech.nu

"Walter" <walter@digitalmars.com> wrote in message news:abvgj4$1bob$1@digitaldaemon.com...
>
> "Carlos" <carlos8294@msn.com> wrote in message news:abuv1c$tn1$1@digitaldaemon.com...
> > Hi
> > I've tried to automate my compiling, so I decided to write a small
> program.
> > But I can't find anything like C system() function to pass something to
> the
> > OS. How can I do it?
> > Thanks
>
> Just call the C one:
>
>     extern (C) int system(char *);
>
>
>
>

"anderson" <anderson@firestar.com.au> wrote in message news:ac0463$1ud0$1@digitaldaemon.com...

> There seems to be a heavy reliance on C (and why shouldn't there be),
which
> means a whole load of externs need to be written. It'd by nice if someone wrote a library or two with all the common ones, just to get things up an running. Or perhaps have it as an optional automatic IDE/Complier task
that
> would recognise common C lib functions (by scanning .h files) and add them
> in.

I believe that all ANSI C functions are to be imported by Phobos in the appropriate modules. It's just Walter doesn't have time to do it all.

Anyhow, you have the package "c", and modules stdlib and stdio there:

    import c.stdlib;
    import c.stdio;

Those functions that aren't there, will probably be, but for now, just declare them (or, as you've suggested, write a module...).

"anderson" <anderson@firestar.com.au> wrote in message news:ac0463$1ud0$1@digitaldaemon.com...
> There seems to be a heavy reliance on C (and why shouldn't there be),
which
> means a whole load of externs need to be written. It'd by nice if someone wrote a library or two with all the common ones, just to get things up an running. Or perhaps have it as an optional automatic IDE/Complier task
that
> would recognise common C lib functions (by scanning .h files) and add them
> in.

Some of them are done, they're in the c.* packages. Writing a tool to do it turns out to be imperfect because of the heavy use of macros typical in C header files.

> PS - I'll probably get flamed for this, but adding an externs doubles the amount of code needed if you only make one call to system (or any other external function).

If you add it to the appropriate c.* import, it only has to be done once.

Thanks,

"Pavel Minayev" <evilone@omen.ru> wrote in message news:ac0dg9$26pd$1@digitaldaemon.com...
> "anderson" <anderson@firestar.com.au> wrote in message news:ac0463$1ud0$1@digitaldaemon.com...
>
> > There seems to be a heavy reliance on C (and why shouldn't there be),
> which
> > means a whole load of externs need to be written. It'd by nice if
someone
> > wrote a library or two with all the common ones, just to get things up
an
> > running. Or perhaps have it as an optional automatic IDE/Complier task
> that
> > would recognise common C lib functions (by scanning .h files) and add
them
> > in.
>
> I believe that all ANSI C functions are to be imported by Phobos in the appropriate modules. It's just Walter doesn't have time to do it all.
>
> Anyhow, you have the package "c", and modules stdlib and stdio there:
>
>     import c.stdlib;
>     import c.stdio;
>
> Those functions that aren't there, will probably be, but for now, just declare them (or, as you've suggested, write a module...).
>
>
>
>