__declspec(dllimport) on 64-bit MSVC not 32-bit

The reason to add __declspec(dllimport) is that
[void *_imp__XXX = &XXX;] inserted by flexlink
for unresolved __declspec(dllimport) symbols
are automatically 64-bit references on 64-bit
MSVC archs. That removes the 'RELOC_REL32, target
is too far' errors.

On 32-bit MSVC archs, the RELOC_REL32 erro should
not be encountered since all DLLs will be within
the same 2GiB virtual address space.

Author: jonahbeckford

src/p/ocaml-common-4_14-a08-declspecdllimport.patch

@@ -1,13 +1,13 @@
 diff --git a/runtime/caml/misc.h b/runtime/caml/misc.h
-index c605f87..43e8762 100644
+index c605f87..41c5e50 100644
 --- a/runtime/caml/misc.h
 +++ b/runtime/caml/misc.h
-@@ -116,6 +116,8 @@ CAMLdeprecated_typedef(addr, char *);
+@@ -114,7 +114,7 @@ CAMLdeprecated_typedef(addr, char *);
+ 
+ #ifndef CAMLDLLIMPORT
    #if defined(SUPPORT_DYNAMIC_LINKING) && defined(ARCH_SIXTYFOUR) \
-       && (defined(__CYGWIN__) || defined(__MINGW32__))
+-      && (defined(__CYGWIN__) || defined(__MINGW32__))
++      && (defined(__CYGWIN__) || defined(__MINGW32__) || defined(_MSC_VER))
      #define CAMLDLLIMPORT __declspec(dllimport)
-+  #elif defined(SUPPORT_DYNAMIC_LINKING) && defined(_MSC_VER)
-+    #define CAMLDLLIMPORT __declspec(dllimport)
    #else
      #define CAMLDLLIMPORT
-   #endif