Comment author: administrator

I would like to be able to specify the root directory for compiler
output. The compiler output for files specified with a relative
pathname would be based from the specified root directory. Absolute
pathnames would still resolve normally. This feature will be useful
for: (a) maintaining separate directories for debug and release
builds and (b) compiling code on a networked resource (nfs, network
appliance) to a local machine.

Current behavior:

$ cd /usr/home/charles
$ ocamlc -o foo one/foo.ml

/usr/home/charles/one/foo.cmi
/usr/home/charles/one/foo.cmo
/usr/home/charles/foo

Behavior with the feature wish:

$ cd /usr/home/charles
$ ocamlc -o foo -O other one/foo.ml

/usr/home/charles/other/one/foo.cmi
/usr/home/charles/other/one/foo.cmo
/usr/home/charles/other/foo

Starting with release 3.08, the -o option for single-file compiles
indicates where to put the generated files. So, you can get the
desired behavior by

ocamlc -c -o other/one/foo.cmo one/foo.ml
ocamlc -o other/foo other/one/foo.cmo

• Xavier Leroy

Comment author: administrator

Equivalent effect can be achieved with -o option a la gcc.