disable stdio locking for Win32, dmake is single threaded

In MS and Mingw's headers, there is no define from fputc to _fputc_nolock.
This has to be done manually.

mingw 4.6.3 has _fputc_nolock in its headers so use it.

extern.h

@@ -43,6 +43,10 @@ sysintf.c(1132) : warning C4996: 'unlink' was declared deprecated
         Message: 'The POSIX name for this item is deprecated. Instead, use the I
 SO C++ conformant name: _unlink. See online help for details.' */
 #define _CRT_NONSTDC_NO_DEPRECATE
+/* get back some of the perf loss caused by >= VC 2005 dropping single threaded
+   static link CRT, this macro disables multithreading locks on some stdio
+   functions */
+#define _CRT_DISABLE_PERFCRIT_LOCKS
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #endif

win95/microsft/sysintf.h

@@ -61,3 +61,7 @@ extern char * getcwd();
 #undef _POSIX_PATH_MAX
 #endif
 #define _POSIX_PATH_MAX _MAX_PATH
+
+#if _MSC_VER >= 1400
+#  define fputc(_c,_stream) _fputc_nolock(_c,_stream)
+#endif

winnt/microsft/sysintf.h

@@ -47,3 +47,7 @@ extern char * getcwd();
 #undef _POSIX_PATH_MAX
 #endif
 #define _POSIX_PATH_MAX _MAX_PATH
+
+#if _MSC_VER >= 1400
+#  define fputc(_c,_stream) _fputc_nolock(_c,_stream)
+#endif

winnt/mingw/sysintf.h

@@ -52,3 +52,5 @@ extern char * getcwd();
 #undef _POSIX_PATH_MAX
 #endif
 #define _POSIX_PATH_MAX _MAX_PATH
+
+#define fputc(_c,_stream) _fputc_nolock(_c,_stream)

winnt/msvc6/sysintf.h

@@ -52,3 +52,7 @@ extern char * getcwd();
 #undef _POSIX_PATH_MAX
 #endif
 #define _POSIX_PATH_MAX _MAX_PATH
+
+#if _MSC_VER >= 1400
+#  define fputc(_c,_stream) _fputc_nolock(_c,_stream)
+#endif