windows: Set _WIN32_WINNT to 0x0601 (Windows 7)

Also remove all defines in many places and define it in configure stage to keep consistency.

build_msvc/common.vcxproj

@@ -17,6 +17,7 @@
       <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
       <DisableSpecificWarnings>4018;4244;4267;4715;4805;</DisableSpecificWarnings>
       <TreatWarningAsError>true</TreatWarningAsError>
+      <PreprocessorDefinitions>_WIN32_WINNT=0x0601;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
   </ItemDefinitionGroup>
 </Project>

configure.ac

@@ -485,7 +485,7 @@ case $host in
        AC_MSG_ERROR("windres not found")
      fi
 
-     CPPFLAGS="$CPPFLAGS -D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB"
+     CPPFLAGS="$CPPFLAGS -D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -D_WIN32_WINNT=0x0601"
      LEVELDB_TARGET_FLAGS="-DOS_WINDOWS"
      if test "x$CXXFLAGS_overridden" = "xno"; then
        CXXFLAGS="$CXXFLAGS -w"

src/compat.h

@@ -11,10 +11,6 @@
 #endif
 
 #ifdef WIN32
-#ifdef _WIN32_WINNT
-#undef _WIN32_WINNT
-#endif
-#define _WIN32_WINNT 0x0501
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN 1
 #endif

src/qt/guiutil.cpp

@@ -21,10 +21,6 @@
 #include <util/system.h>
 
 #ifdef WIN32
-#ifdef _WIN32_WINNT
-#undef _WIN32_WINNT
-#endif
-#define _WIN32_WINNT 0x0501
 #ifdef _WIN32_IE
 #undef _WIN32_IE
 #endif

src/support/lockedpool.cpp

@@ -10,10 +10,6 @@
 #endif
 
 #ifdef WIN32
-#ifdef _WIN32_WINNT
-#undef _WIN32_WINNT
-#endif
-#define _WIN32_WINNT 0x0501
 #define WIN32_LEAN_AND_MEAN 1
 #ifndef NOMINMAX
 #define NOMINMAX

src/util/system.cpp

@@ -44,11 +44,6 @@
 #pragma warning(disable:4717)
 #endif
 
-#ifdef _WIN32_WINNT
-#undef _WIN32_WINNT
-#endif
-#define _WIN32_WINNT 0x0501
-
 #ifdef _WIN32_IE
 #undef _WIN32_IE
 #endif