Hi,
In http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Black_Hole it says Make sure you put the blackhole-libs into a directory called "std" in ~~/ lib/modules I find this sentence unclear. Not being a regular Gambit user yet, I don't know where ~~ is.
Gambit automatically expands "~~lib" to the libdir where it was installed, so you should It's a mechanism for improved portability. On my computer (and probably most of those running FreeBSD), it expands to "/usr/local/lib/gambit-c/" For example:
(path-expand "~~lib") => "/usr/local/lib/gambit-c/"
I, however, believe that the slash between "~~" and "lib" on the blackhole page you linked is a mistake (either a documentation mistake, or a design mistake, for I reckon it should be "~~lib/modules"
Cheers,
P!