On 29-Jan-06, at 9:56 AM, Christian wrote:

Hello

Speaking of compiler warnings: I'm sometimes getting:

foo.c:7033: Warnung: use of cast expressions as lvalues is deprecated

in cases like:

(c-declare "....... struct sigqueue * global_queue;") .... (define global-queue (c-lambda () sigqueue "___result= global_queue;"))

Is there a more correct way to assign something to the result?

Yes. Whenever you are returning a pointer, you have to assign it to ___result_voidstar (which is a variable of type void*). So your code should read:

(define global-queue (c-lambda () sigqueue "___result_voidstar = global_queue;"))

Gambit uses this approach to avoid some problems with C++ handling of pointers.

Marc