3

I have two ocaml projects being compiled with ocaml 4.02.1. Is there a way to create separate opam installations for each project instead of having both projects install their dependencies in the global 4.02.1 opam switch?

hugomg
  • 68,213
  • 24
  • 160
  • 246

1 Answers1

7

In opam you can have several installations of the same compiler:

opam switch -A 4.02.1 proj1
opam switch -A 4.02.1 proj2

will create two separate independent stacks for each project. You may also find these commands useful: 

opam switch export
opam switch import
hugomg
  • 68,213
  • 24
  • 160
  • 246
ivg
  • 34,431
  • 2
  • 35
  • 63
  • 2
    If you alias the `system` compiler, OPAM also does a "fast switch" that doesn't require reinstalling everything. So you could do `opam switch -A system proj1`, assuming that your system compiler is 4.01.0 – Anil Madhavapeddy Jan 23 '15 at 16:30
  • The `-A` option was removed in `opam` 2.1 . For now, we should use the following command to create a switch: `opam switch create `. – jubnzv Jul 15 '22 at 07:55