On Fri, 2013-04-26 at 08:40 -0600, Zach wrote: > Thanks Martin, that's just what I'll do. > However, isn't the entire point of a groveler to build a little C > program that gathers information like this for later use?
The groveler can only deal with compile-time constants. What Martin means, I suppose, is that HUGE_VAL could be defined as a function call to a compiler intrinsic, for instance. See http://cvsweb.netbsd.org/bsdweb.cgi/src/include/math.h?rev=1.62 > If one were to write a general purpose way to do this, wouldn't the > logical place to put that code be in cffi-groveler? To do what exactly ? > Is the main hurdle here the fact that HUGE_VAL doesn't necessarily > have a representation as a Lisp integer or double-float, the only two > types that cvar allows? That too is an issue. There's another ASDF component in cffi-grovel, named wrapper-file, that can help with automatically generating a shared library that contains functions that wrap values which cannot be portably grovelled, so your best choice might be to generate a wrapper that returns an uint64_t which you then pass to nlopt_set_lower_bounds(), completely avoiding the use of Lisp floats. -- Stelian Ionescu a.k.a. fe[nl]ix Quidquid latine dictum sit, altum videtur. http://common-lisp.net/project/iolib
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