diff -Nru pcre-ocaml-7.4.3/CHANGES.md pcre-ocaml-7.4.6/CHANGES.md
--- pcre-ocaml-7.4.3/CHANGES.md	2019-10-27 21:30:56.000000000 +0000
+++ pcre-ocaml-7.4.6/CHANGES.md	2020-08-04 17:34:21.000000000 +0000
@@ -1,3 +1,21 @@
+### 7.4.6 (2020-08-04)
+
+  * Removed mistakenly kept base library configuration dependency.
+
+
+### 7.4.5 (2020-08-04)
+
+  * Removed excessive build dependency on `base` package.
+
+
+### 7.4.4 (2020-07-30)
+
+  * Added missing dune-configurator dependency.
+
+  * Added support for const char strings in stubs due to stricter handling
+    in newer OCaml runtimes.  This eliminates C-compiler warnings.
+
+
 ### 7.4.3 (2019-10-27)
 
   * Switched from `caml_alloc_custom` to `caml_alloc_custom_mem`.
diff -Nru pcre-ocaml-7.4.3/debian/changelog pcre-ocaml-7.4.6/debian/changelog
--- pcre-ocaml-7.4.3/debian/changelog	2020-01-29 08:23:17.000000000 +0000
+++ pcre-ocaml-7.4.6/debian/changelog	2020-08-20 06:32:24.000000000 +0000
@@ -1,3 +1,10 @@
+pcre-ocaml (7.4.6-1) unstable; urgency=medium
+
+  * New upstream release
+  * Bump debhelper compat level to 13
+
+ -- Stéphane Glondu <glondu@debian.org>  Thu, 20 Aug 2020 08:32:24 +0200
+
 pcre-ocaml (7.4.3-1) unstable; urgency=medium
 
   * New upstream release
diff -Nru pcre-ocaml-7.4.3/debian/control pcre-ocaml-7.4.6/debian/control
--- pcre-ocaml-7.4.3/debian/control	2020-01-29 08:23:17.000000000 +0000
+++ pcre-ocaml-7.4.6/debian/control	2020-08-20 06:32:24.000000000 +0000
@@ -4,12 +4,11 @@
 Maintainer: Debian OCaml Maintainers <debian-ocaml-maint@lists.debian.org>
 Uploaders: Stéphane Glondu <glondu@debian.org>
 Build-Depends:
- debhelper-compat (= 12),
+ debhelper-compat (= 13),
  libpcre3-dev,
  ocaml-nox,
  ocaml-dune,
  libdune-ocaml-dev,
- libbase-ocaml-dev,
  dh-ocaml
 Standards-Version: 4.5.0
 Rules-Requires-Root: no
diff -Nru pcre-ocaml-7.4.3/debian/rules pcre-ocaml-7.4.6/debian/rules
--- pcre-ocaml-7.4.3/debian/rules	2020-01-29 08:23:17.000000000 +0000
+++ pcre-ocaml-7.4.6/debian/rules	2020-08-20 06:32:24.000000000 +0000
@@ -22,6 +22,3 @@
 override_dh_auto_install:
 	dune install --destdir=$(DESTDIR) --prefix=/usr --libdir=..$(OCAML_STDLIB_DIR)
 	rm -f $(DESTDIR)/usr/doc/pcre/LICENSE.md
-
-override_dh_missing:
-	dh_missing --fail-missing
diff -Nru pcre-ocaml-7.4.3/dune-project pcre-ocaml-7.4.6/dune-project
--- pcre-ocaml-7.4.3/dune-project	2019-10-27 21:30:56.000000000 +0000
+++ pcre-ocaml-7.4.6/dune-project	2020-08-04 17:34:21.000000000 +0000
@@ -20,8 +20,8 @@
   (depends
     (ocaml (>= 4.08))
     (dune (>= 1.10))
+    dune-configurator
     (conf-libpcre :build)
-    (base :build)
     base-bytes
   )
 )
diff -Nru pcre-ocaml-7.4.3/pcre.opam pcre-ocaml-7.4.6/pcre.opam
--- pcre-ocaml-7.4.3/pcre.opam	2019-10-27 21:30:56.000000000 +0000
+++ pcre-ocaml-7.4.6/pcre.opam	2020-08-04 17:34:21.000000000 +0000
@@ -20,7 +20,7 @@
 depends: [
   "ocaml" {>= "4.08"}
   "dune" {>= "1.10"}
+  "dune-configurator"
   "conf-libpcre" {build}
-  "base" {build}
   "base-bytes"
 ]
diff -Nru pcre-ocaml-7.4.3/src/config/discover.ml pcre-ocaml-7.4.6/src/config/discover.ml
--- pcre-ocaml-7.4.3/src/config/discover.ml	2019-10-27 21:30:56.000000000 +0000
+++ pcre-ocaml-7.4.6/src/config/discover.ml	2020-08-04 17:34:21.000000000 +0000
@@ -1,5 +1,3 @@
-open Base
-
 let () =
   let module C = Configurator.V1 in
   C.main ~name:"pcre" (fun c ->
@@ -7,9 +5,10 @@
       libs = ["-lpcre"];
       cflags = []
     } in
-    let conf =
-      Option.value_map (C.Pkg_config.get c) ~default ~f:(fun pc ->
-        Option.value (C.Pkg_config.query pc ~package:"libpcre") ~default)
+    let conf = match C.Pkg_config.get c with
+      | None -> default
+      | Some pc ->
+         Option.value (C.Pkg_config.query pc ~package:"libpcre") ~default
     in
     C.Flags.write_sexp "c_flags.sexp" conf.cflags;
     C.Flags.write_sexp "c_library_flags.sexp" conf.libs)
diff -Nru pcre-ocaml-7.4.3/src/config/dune pcre-ocaml-7.4.6/src/config/dune
--- pcre-ocaml-7.4.3/src/config/dune	2019-10-27 21:30:56.000000000 +0000
+++ pcre-ocaml-7.4.6/src/config/dune	2020-08-04 17:34:21.000000000 +0000
@@ -1,4 +1,4 @@
 (executables
   (names discover)
-  (libraries base dune.configurator)
+  (libraries dune.configurator)
 )
diff -Nru pcre-ocaml-7.4.3/src/dune pcre-ocaml-7.4.6/src/dune
--- pcre-ocaml-7.4.3/src/dune	2019-10-27 21:30:56.000000000 +0000
+++ pcre-ocaml-7.4.6/src/dune	2020-08-04 17:34:21.000000000 +0000
@@ -1,11 +1,7 @@
 (library
   (public_name pcre)
   (c_names pcre_stubs)
-  (c_flags
-    (:standard)
-    (:include c_flags.sexp) -O2 -fPIC -DPIC
-    -Wno-keyword-macro
-  )
+  (c_flags (:standard) (:include c_flags.sexp) -O2 -fPIC -DPIC)
   (c_library_flags (:include c_library_flags.sexp))
 )
 
diff -Nru pcre-ocaml-7.4.3/src/pcre_stubs.c pcre-ocaml-7.4.6/src/pcre_stubs.c
--- pcre-ocaml-7.4.3/src/pcre_stubs.c	2019-10-27 21:30:56.000000000 +0000
+++ pcre-ocaml-7.4.6/src/pcre_stubs.c	2020-08-04 17:34:21.000000000 +0000
@@ -36,11 +36,9 @@
 #endif
 
 #if __GNUC__ >= 3
-# define inline inline __attribute__ ((always_inline))
 # define __unused __attribute__ ((unused))
 #else
 # define __unused
-# define inline
 #endif
 
 #include <ctype.h>
@@ -513,16 +511,11 @@
   if (ftable == NULL) return None;
   else {
     value v_res, v_res_str;
-    char *ptr;
-    int i;
 
     Begin_roots1(v_rex);
-      v_res_str = caml_alloc_string(32);
+      v_res_str = caml_alloc_initialized_string(32, (char *) ftable);
     End_roots();
 
-    ptr = String_val(v_res_str);
-    for (i = 0; i <= 31; ++i) { *ptr = *ftable; ++ptr; ++ftable; }
-
     Begin_roots1(v_res_str);
       /* Allocates [Some string] from firsttable */
       v_res = caml_alloc_small(1, 0);