config-win32: fix SIZEOF_OFF_T for MSVC and old MinGW

The previously set default value of 8 (64-bit) is only correct for
mingw-w64 and only when we set `_FILE_OFFSET_BITS` to 64 (the default
when building curl). For MSVC, old MinGW and other Windows compilers,
the correct value is 4 (32-bit). Adjust condition accordingly. Also
drop the manual override option.

Regression in 7.86.0 (from 68fa9bf3f5d7b4fcbb57619f70cb4aabb79a51f6)

Bug: https://github.com/curl/curl/pull/9712#issuecomment-1307330551

Reported-by: Peter Piekarski
Reviewed-by: Jay Satiro
Closes #9872

diff --git a/lib/config-win32.h b/lib/config-win32.h
index 2837380227cbff3c0b46de1065bcdb0fdd655f45..fb10f7e945d43d792fdd658a5f515ac485ac2ab0 100644 (file)
--- a/lib/config-win32.h
+++ b/lib/config-win32.h
@@ -331,11 +331,6 @@
 /* Define to the size of `curl_off_t', as computed by sizeof. */
 #define SIZEOF_CURL_OFF_T 8
 
-/* Define to the size of `off_t', as computed by sizeof. */
-#ifndef SIZEOF_OFF_T
-#define SIZEOF_OFF_T 8
-#endif
-
 /* ---------------------------------------------------------------- */
 /*               BSD-style lwIP TCP/IP stack SPECIFIC               */
 /* ---------------------------------------------------------------- */
@@ -577,6 +572,14 @@ Vista
 #  endif
 #endif
 
+/* Define to the size of `off_t', as computed by sizeof. */
+#if defined(__MINGW64_VERSION_MAJOR) && \
+  defined(_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
+#  define SIZEOF_OFF_T 8
+#else
+#  define SIZEOF_OFF_T 4
+#endif
+
 /* ---------------------------------------------------------------- */
 /*                       DNS RESOLVER SPECIALTY                     */
 /* ---------------------------------------------------------------- */