[ft] [ftjam] SharedLibrary rule problem

[meh. I don't care]

JAM can't find the compiler, I guess there's a variable that has to be
set but I don't know.

Actually I have:

SharedLibrary System$(SUFSHR) : src/lib/System/System.c ;

That results in:

Cc src/lib/System/System.lo 
/bin/sh: line 1: -c: command not found

 -c -o src/lib/System/System.lo -DXP_UNIX 
-D__LJS_LIBRARY_PATH__=\"/usr/lib/lulzjs/\" -fpic -O src/lib/System/System.c

 ...failed Cc src/lib/System/System.lo ...

The other files get compiled without any problem so I guess it's just
something with the SharedLibrary rule but I'm still new to JAM so
probably I'm wrong.

Any idea about what it is?