Howdy,

When I tried to compile Guile on a QNX 6.3.0 system, it did not find
the libtool and gmp libraries or the gmp header files that I'd built
and installed under /usr/local until I set the CPPFLAGS environment
variable to -I/usr/local/include and the LDFLAGS environment variable
to -L/usr/local/lib.

-- 
Matt