add base package, does nothing, for 4.12 and up

Author: c-cube

packages/atomic/atomic.base/files/META.atomic

@@ -0,0 +1,4 @@
+name="atomic"
+version="[distributed with OCaml 4.12 or above]"
+description="dummy backward-compatibility package for Atomic"
+requires=""

packages/atomic/atomic.base/files/atomic.install

@@ -0,0 +1,3 @@
+lib:[
+  "META.atomic" {"META"}
+]

packages/atomic/atomic.base/opam

@@ -0,0 +1,15 @@
+opam-version: "2.0"
+maintainer: " "
+authors: " "
+homepage: " "
+depends: [
+  "ocaml" {>= "4.12.0"}
+]
+dev-repo: "git+https://github.com/ocaml/ocaml.git"
+bug-reports: "https://caml.inria.fr/mantis/main_page.php"
+synopsis:
+  "Compatibility package for OCaml's Atomic module starting from 4.12"
+extra-files: [
+  ["atomic.install" "md5=07d4c6139af25547d07d3349554928fe"]
+  ["META.atomic" "md5=711dbdefd03b934132b4ac0ab39e7c98"]
+]