curl: Select file APIs on Windows

Choose small or large file support based on capabilities of compiler
and target platform.

Utilities/cmcurl/lib/curl_config.h.cmake

@@ -906,10 +906,6 @@
 /* if SSL is enabled */
 #cmakedefine USE_SSLEAY 1
 
-/* Define to 1 if you are building a Windows target without large file
-   support. */
-#cmakedefine USE_WIN32_LARGE_FILES 1
-
 /* to enable SSPI support */
 #cmakedefine USE_WINDOWS_SSPI 1
 

Utilities/cmcurl/lib/curl_setup.h

@@ -345,6 +345,17 @@
   #include <clib.h>
 #endif
 
+/* Default Windows file API selection.  */
+#ifdef _WIN32
+# if defined(_MSC_VER) && (_INTEGRAL_MAX_BITS >= 64)
+#  define USE_WIN32_LARGE_FILES
+# elif defined(__MINGW32__)
+#  define USE_WIN32_LARGE_FILES
+# else
+#  define USE_WIN32_SMALL_FILES
+# endif
+#endif
+
 /*
  * Large file (>2Gb) support using WIN32 functions.
  */