Macintosh:lablgtk-2.10.0 marknewland$ ./configure && make world && make install
checking for ocamlc... ocamlc
ocaml version is 3.10.0
ocaml library path is /usr/local/lib/ocaml
Default install dirs are : /usr/local/lib/ocaml/lablgtk2 and /usr/local/lib/ocaml/stublibs
Compile with ocamlc -I +lablgtk2
checking for ocamlopt... ocamlopt
checking ocamlopt version... ok
checking for ocamlc.opt... ocamlc.opt
checking ocamlc.opt version... ok
checking for ocamlopt.opt... ocamlopt.opt
checking ocamlc.opt version... ok
checking for ocamlrun... ocamlrun
checking for ocamldep... ocamldep
checking for ocamldoc... ocamldoc
checking for ocamllex... ocamllex
checking for ocamlyacc... ocamlyacc
checking for ocamlmktop... ocamlmktop
checking for ocamlmklib... ocamlmklib
checking for camlp4o... camlp4o
checking for ocaml threads... use system threads
checking for ocaml dll support... yes
checking for ranlib... ranlib
OCaml uses gcc to compile C files
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking platform... Unix
checking for pkg-config... /opt/local/bin/pkg-config
checking for GTK+ - version >= 2.0.0... no
*** Could not run GTK+ test program, checking why...
*** The test program failed to compile or link. See the file config.log for the
*** exact error that occured. This usually means GTK+ is incorrectly installed.
configure: error: GTK+ is required