Support flexdll 0.43/0.44 vendor-supplied patches

Author: jonahbeckford

CHANGES.md

@@ -2,6 +2,10 @@
 
 ## Pending
 
+* Support vendor-supplied patches for flexdll 0.43 and (unreleased) 0.44. Used by DkSDK CMake's `110-ocaml-lang`.
+
+## 2.1.3
+
 * Backport from 5.2.0 of [Linear computation of closure environments](https://github.com/ocaml/ocaml/pull/12222)
   to fix performance bug <https://discuss.ocaml.org/t/scaling-factors-when-compiling-mutually-recursive-definitions/14708>
 

src/r-c-ocaml-1-setup.sh

@@ -466,7 +466,7 @@ set_ocaml_version_stems() {
         4.*) VERSION_STEMS+=("4") ;;
         5.*) VERSION_STEMS+=("5") ;;
         *)
-            echo "FATAL: Unsupported stemming case 1 for version $set_version_stems_VER" >&2
+            echo "FATAL: Unsupported stemming case 1 for ocaml version $set_version_stems_VER" >&2
             exit 123
             ;;
     esac
@@ -480,16 +480,17 @@ set_ocaml_version_stems() {
         5.1.*) VERSION_STEMS+=("5_1") ;;
         5.2.*) VERSION_STEMS+=("5_2") ;;
         *)
-            echo "FATAL: Unsupported stemming case 2 for version $set_version_stems_VER" >&2
+            echo "FATAL: Unsupported stemming case 2 for ocaml version $set_version_stems_VER" >&2
             exit 123
             ;;
     esac
     case "$set_version_stems_VER" in
         4.14.0) VERSION_STEMS+=("4_14_0") ;;
         4.14.1) VERSION_STEMS+=("4_14_1") ;;
         4.14.2) VERSION_STEMS+=("4_14_2") ;;
+        4.14.3) VERSION_STEMS+=("4_14_3") ;;
         *)
-            echo "FATAL: Unsupported stemming case 3 for version $set_version_stems_VER" >&2
+            echo "FATAL: Unsupported stemming case 3 for ocaml version $set_version_stems_VER" >&2
             exit 123
             ;;
     esac
@@ -500,12 +501,20 @@ set_flexdll_version_stems() {
     VERSION_STEMS=()
     case "$set_version_stems_VER" in
         0.*) VERSION_STEMS+=("0") ;;
+        *)
+            echo "FATAL: Unsupported stemming case 1 for flexdll version $set_version_stems_VER" >&2
+            exit 123
+            ;;
     esac
     case "$set_version_stems_VER" in
         0.39) VERSION_STEMS+=("0_39") ;;
-    esac
-    case "$set_version_stems_VER" in
         0.42) VERSION_STEMS+=("0_42") ;;
+        0.43) VERSION_STEMS+=("0_43") ;;
+        0.44) VERSION_STEMS+=("0_44") ;;
+        *)
+            echo "FATAL: Unsupported stemming case 2 for flexdll version $set_version_stems_VER" >&2
+            exit 123
+            ;;
     esac
 }
 # Sets the array PATCHES and accumulates dkmldir/ relative paths, including