revive base-flambda package for malfuncttion dependencies

Author: hannesm

packages/base-flambda/base-flambda.base/opam

@@ -0,0 +1,43 @@
+opam-version: "2.0"
+maintainer: "[email protected]"
+build: [["ocaml" "check_flambda.ml"]]
+depends: [
+  "ocaml"
+  "ocaml-variants"
+    {= "4.03.0+beta1+flambda" | = "4.03.0+beta2+flambda" | = "4.03.0+flambda" |
+     = "4.03.0+fp+flambda" |
+     = "4.03.0+trunk+flambda" |
+     = "4.03.0+trunk+fp+flambda" |
+     = "4.04.0+beta1+flambda" |
+     = "4.04.0+beta2+flambda" |
+     = "4.04.0+flambda" |
+     = "4.04.0+fp+flambda" |
+     = "4.04.0+trunk+forced_lto" |
+     = "4.04.1+flambda" |
+     = "4.04.1+fp+flambda" |
+     = "4.04.2+flambda" |
+     = "4.04.2+fp+flambda" |
+     = "4.05.0+beta1+flambda" |
+     = "4.05.0+beta2+flambda" |
+     = "4.05.0+flambda" |
+     = "4.05.0+musl+static+flambda" |
+     = "4.05.0+rc1+flambda" |
+     = "4.05.0+trunk+flambda" |
+     = "4.05.0+trunk+fp+flambda" |
+     = "4.05.0+trunk+lto" |
+     = "4.06.0+trunk+flambda" |
+     = "4.06.0+trunk+fp+flambda"}
+  "ocamlfind" {build}
+]
+synopsis: "Virtual package relying on Flambda."
+description:
+  "This package can only install if the OCaml compiler supports Flambda."
+extra-source "check_flambda.ml" {
+  src:
+    "https://raw.githubusercontent.com/ocaml/opam-source-archives/main/patches/base-flambda/check_flambda.ml"
+  checksum: [
+    "sha256=5a3c1a9346031b49c8c927635f3804533ed96c0e7bfd3aeefeb6922f25311647"
+    "md5=5520d6c3cafc445ae54bd6de491fc17f"
+  ]
+}
+available: false # got removed in 56efaa4b46a42eae0b463c1dfc2c3f02362cf633