[plt-scheme] scheme_check_threads gives Bus error on OS X

>I recommend using mzc to compile and link your C code. It uses the
>right flags and libraries for an extension.
>
>  
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Does mzc handle objective-c? The library Im using has some of its source 
written in objective-c which gcc handles ok. At first mzc complained 
that the .m files werent C files due to the suffix but after renaming 
them it gave syntax errors.