Calling D from C

[Chris W.]

On Monday, 12 March 2012 at 15:00:31 UTC, Steven Schveighoffer 
wrote:
> On Mon, 12 Mar 2012 10:53:09 -0400, Chris W. <wendlec at cd.ie> 
> wrote:
>
>> I have a problem when calling D functions from C. While I can
>> perform simple arithmetic operations (i.e. the calculation is
>> performed in D and returned to C), I experience problems when
>> trying to perform string/char operations or call functions from
>> the D standard library (e.g. writefln()). The usual error 
>> message
>> I get is either "Bus error" or "Segmentation fault". I haven't
>> been able to find the reason for this. The programs compile and
>> link, however, when run, they terminate with "Bus error" 
>> whenever
>> a D function is performed within the D code, e.g. something 
>> like
>> char[] s2 = s.dup; (s is a char* passed from C). Any hint or 
>> help
>> would be appreciated.
>>
>> I am using Mac OS X, 10.6.7
>
> If C is running your application startup, you must initialize 
> D's runtime from your C main routine.
>
> -Steve

Yes, I am using extern (C) and in my C main function I call

gc_init();
thread_attachThis();

This works fine for primitive types such as int + int 
calculations. But anything more sophisticated renders a Bus 
error. I am sure it is just some little detail I have forgotten.