*grin* true...
have rebuilt the system about 10 times over the weekend with different params each time (and in each case checking gcc and all bintills compilers etc present)
silly boy me never actually bothered logging any of this!
error was something along the lines of warning: changing search order for directory "/usr/local/include" as it has already been specified as a non-system directory
tried to set the environment variable so it's included there, but that didn't seem to have any effect at all (in fact it displayed as
./(v.v. long compiler path)/../../../../../usr/local/include
btw... thanks - think I might stick around!