mdbx: resolve all warnings from MinGW.

mdbx.h

@@ -324,7 +324,8 @@ typedef mode_t mdbx_mode_t;
 #endif /* MDBX_DEPRECATED */
 
 #ifndef __dll_export
-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(_WIN32) || defined(_WIN64) || defined(__CYGWIN__) ||               \
+    defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)
 #if defined(__GNUC__) || __has_attribute(__dllexport__)
 #define __dll_export __attribute__((__dllexport__))
 #elif defined(_MSC_VER)
@@ -340,7 +341,8 @@ typedef mode_t mdbx_mode_t;
 #endif /* __dll_export */
 
 #ifndef __dll_import
-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(_WIN32) || defined(_WIN64) || defined(__CYGWIN__) ||               \
+    defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)
 #if defined(__GNUC__) || __has_attribute(__dllimport__)
 #define __dll_import __attribute__((__dllimport__))
 #elif defined(_MSC_VER)
@@ -457,8 +459,13 @@ typedef mode_t mdbx_mode_t;
 
 #ifndef MDBX_PRINTF_ARGS
 #if defined(__GNUC__) || __has_attribute(__format__)
+#if defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)
+#define MDBX_PRINTF_ARGS(format_index, first_arg)                              \
+  __attribute__((__format__(__gnu_printf__, format_index, first_arg)))
+#else
 #define MDBX_PRINTF_ARGS(format_index, first_arg)                              \
   __attribute__((__format__(__printf__, format_index, first_arg)))
+#endif /* __MINGW_PRINTF_FORMAT */
 #else
 #define MDBX_PRINTF_ARGS(format_index, first_arg)
 #endif

mdbx.h++

@@ -5463,6 +5463,7 @@ inline size_t txn::put_multiple(map_handle map, const slice &key,
     if (allow_partial)
       break;
     mdbx_txn_break(handle_);
+    MDBX_CXX17_FALLTHROUGH /* fallthrough */;
   default:
     MDBX_CXX20_UNLIKELY error::throw_exception(err);
   }

src/defs.h

@@ -107,6 +107,11 @@
 #   define __noop(...) do {} while(0)
 #endif /* __noop */
 
+#if defined(__fallthrough) &&                                                  \
+    (defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__))
+#undef __fallthrough
+#endif /* __fallthrough workaround for MinGW */
+
 #ifndef __fallthrough
 #  if defined(__cplusplus) && (__has_cpp_attribute(fallthrough) &&             \
      (!defined(__clang__) || __clang__ > 4)) || __cplusplus >= 201703L

src/internals.h

@@ -122,6 +122,11 @@
 #pragma GCC diagnostic ignored "-Wattributes"
 #endif /* GCC < 9 */
 
+#if (defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)) &&    \
+    !defined(__USE_MINGW_ANSI_STDIO)
+#define __USE_MINGW_ANSI_STDIO 1
+#endif /* __USE_MINGW_ANSI_STDIO */
+
 #include "../mdbx.h"
 #include "defs.h"
 

src/lck-windows.c

@@ -754,6 +754,11 @@ MDBX_GetTickCount64 mdbx_GetTickCount64;
 MDBX_RegGetValueA mdbx_RegGetValueA;
 #endif /* xMDBX_ALLOY */
 
+#if __GNUC_PREREQ(8, 0)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-function-type"
+#endif /* GCC/MINGW */
+
 static void mdbx_winnt_import(void) {
   const HINSTANCE hNtdll = GetModuleHandleA("ntdll.dll");
 
@@ -805,4 +810,8 @@ static void mdbx_winnt_import(void) {
   }
 }
 
+#if __GNUC_PREREQ(8, 0)
+#pragma GCC diagnostic pop
+#endif /* GCC/MINGW */
+
 #endif /* Windows LCK-implementation */

src/mdbx.c++

@@ -9,6 +9,11 @@
 #define _CRT_SECURE_NO_WARNINGS
 #endif /* _CRT_SECURE_NO_WARNINGS */
 
+#if (defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)) &&    \
+    !defined(__USE_MINGW_ANSI_STDIO)
+#define __USE_MINGW_ANSI_STDIO 1
+#endif /* __USE_MINGW_ANSI_STDIO */
+
 #include "../mdbx.h++"
 
 #include "defs.h"

src/osal.h

@@ -474,7 +474,7 @@ typedef union bin128 {
 
 #if defined(_WIN32) || defined(_WIN64)
 typedef union MDBX_srwlock {
-  struct {
+  __anonymous_struct_extension__ struct {
     long volatile readerCount;
     long volatile writerCount;
   };

test/chrono.cc

@@ -78,6 +78,12 @@ time from_ms(uint64_t ms) {
   return result;
 }
 
+#if __GNUC_PREREQ(8, 0) &&                                                     \
+    (defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__))
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-function-type"
+#endif /* GCC/MINGW */
+
 time now_realtime() {
 #if defined(_WIN32) || defined(_WIN64) || defined(_WINDOWS)
   static void(WINAPI * query_time)(LPFILETIME);
@@ -133,4 +139,9 @@ time now_monotonic() {
 #endif
 }
 
+#if __GNUC_PREREQ(8, 0) &&                                                     \
+    (defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__))
+#pragma GCC diagnostic pop
+#endif /* GCC/MINGW */
+
 } /* namespace chrono */

test/osal-windows.cc

@@ -75,7 +75,7 @@ void osal_setup(const std::vector<actor_config> &actors) {
     if (!hEvent)
       failure_perror("CreateEvent()", GetLastError());
     hEvent = make_inheritable(hEvent);
-    log_trace("osal_setup: event %" PRIuPTR " -> %p", i, hEvent);
+    log_trace("osal_setup: event %u -> %p", i, hEvent);
     events[i] = hEvent;
   }