release 5.1.1

- remove unused primitive caml_compression_available during bootstrap

Changes

@@ -1,5 +1,5 @@
-OCaml 5.1.1
------------
+OCaml 5.1.1 (8 December 2023)
+----------------------------
 
 ### Standard library:
 

VERSION

@@ -1,4 +1,4 @@
-5.1.1+dev3-2023-12-7
+5.1.1
 
 # Starting with OCaml 4.14, although the version string that appears above is
 # still correct and this file can thus still be used to figure it out,

build-aux/ocaml_version.m4

@@ -25,7 +25,7 @@
 # The following macro, OCAML__DEVELOPMENT_VERSION, should be either
 # [true] of [false].
 
-m4_define([OCAML__DEVELOPMENT_VERSION], [true])
+m4_define([OCAML__DEVELOPMENT_VERSION], [false])
 
 # The three following components (major, minor and patch level) MUST be
 # integers. They MUST NOT be left-padded with zeros and all of them,
@@ -36,7 +36,7 @@ m4_define([OCAML__VERSION_MINOR], [1])
 m4_define([OCAML__VERSION_PATCHLEVEL], [1])
 # Note that the OCAML__VERSION_EXTRA string defined below is always empty
 # for officially-released versions of OCaml.
-m4_define([OCAML__VERSION_EXTRA], [dev3-2023-12-7])
+m4_define([OCAML__VERSION_EXTRA], [])
 
 # The OCAML__VERSION_EXTRA_PREFIX macro defined below should be a
 # single character:

ocaml-variants.opam

@@ -1,7 +1,7 @@
 opam-version: "2.0"
-version: "5.1.1+trunk"
+version: "5.1.1"
 license: "LGPL-2.1-or-later WITH OCaml-LGPL-linking-exception"
-synopsis: "OCaml development version"
+synopsis: "Official release of OCaml 5.1.1"
 depends: [
   "ocaml" {= "5.1.1" & post}
   "base-unix" {post}

runtime/intern.c

@@ -794,11 +794,6 @@ size_t (*caml_intern_decompress_input)(unsigned char *,
                                        const unsigned char *,
                                        uintnat) = NULL;
 
-CAMLprim value caml_compression_available(value vunit)
-{
-  return Val_bool(caml_intern_decompress_input != NULL);
-}
-
 static void intern_decompress_input(struct caml_intern_state * s,
                                     const char * fun_name,
                                     struct marshal_header * h)