Merge pull request #26253 from dra27/no-windows-ctypes

ctypes prior to 0.4.0 doesn't support Windows

Author: mseri

packages/ctypes/ctypes.0.1.1/opam

@@ -5,6 +5,7 @@ bug-reports: "http://github.com/yallop/ocaml-ctypes/issues"
 license: "MIT"
 build: make
 remove: [["ocamlfind" "remove" "ctypes"]]
+available: os != "win32"
 depends: [
   "ocaml" {>= "4.00.0" & < "4.03.0"}
   "ocamlfind"

packages/ctypes/ctypes.0.2.3/opam

@@ -7,6 +7,7 @@ build: make
 remove: [
   ["ocamlfind" "remove" "ctypes"]
 ]
+available: os != "win32"
 depends: [
   "ocaml" {>= "4.00.0" & < "4.03.0"}
   "ocamlfind"

packages/ctypes/ctypes.0.3.4/opam

@@ -7,6 +7,7 @@ build: make
 remove: [
   ["ocamlfind" "remove" "ctypes"]
 ]
+available: os != "win32"
 depends: [
   "ocaml" {>= "4.00.0" & < "4.03.0"}
   "base-bytes"