ocaml/opam — pull request #1523 by AltGr (2014-07-16 13:08:07+00:00)
Title: Handle build, test and doc flags in depends and depopts

To be documented.
Ref: #1231
Syntax is for example:

depends: [ "a" {>= "3"}
"b" {build}
"c" {build & test & < "4"} ]

The keywords need to be leading.