A patch to enable compiling on latest mingw env.

Contributed by TOYAMA Shin-ichi

Makefile

@@ -1,10 +1,10 @@
 # Tux Paint - A simple drawing program for children.
 
-# Copyright (c) 2002-2016 by Bill Kendrick and others
+# Copyright (c) 2002-2017 by Bill Kendrick and others
 # bill@newbreedsoftware.com
 # http://www.tuxpaint.org/
 
-# June 14, 2002 - December 11, 2016
+# June 14, 2002 - December 30, 2017
 
 
 # The version number, for release:
@@ -894,7 +894,7 @@ install-dlls:
 	@cp `which libgcc_s_dw2-1.dll` $(BIN_PREFIX)
 	@cp `which libstdc++-6.dll` $(BIN_PREFIX)
 	@cp `which libfribidi-0.dll` $(BIN_PREFIX)
-	@cp `which libpthread-2.dll` $(BIN_PREFIX)
+	@cp `which libwinpthread-1.dll` $(BIN_PREFIX)
 	@if [ "x$(BDIST_WIN9X)" == "x" ]; then \
 	  cp `which libxml2-2.dll` $(BIN_PREFIX); \
 	  cp `which libcairo-2.dll` $(BIN_PREFIX); \

src/compiler.h

@@ -24,40 +24,10 @@
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   (See COPYING.txt)
 
-  June 14, 2002 - February 24, 2010
+  June 14, 2002 - December 30, 2017
   $Id$
 */
 
-#ifdef WIN32
-/* Horrible, dangerous macros. */
-/*
-  The SDL stderr redirection trick doesn't seem to work for perror().
-  This does pretty much the same thing.
-*/
-#define perror(str) ({ \
-  if ( (str) && *(str) ) \
-    fprintf(stderr,"%s : ",(str)); \
-  fprintf(stderr, \
-          "%s [%d]\n", \
-          (errno<_sys_nerr)?_sys_errlist[errno]:"unknown",errno ); \
-})
-
-/*
-  MinGW implementation of isspace() crashes on some Win98 boxes
-  if c is 'out-of-range'.
-*/
-#define isspace(c) (((c) == 0x20) || ((c) >= 0x09 && (c) <= 0x0D))
-
-/*
-  WIN32 and MINGW don't have strcasestr().
-*/
-#define NOMINMAX
-#include "shlwapi.h"
-#define strcasestr StrStrI
-#endif /* WIN32 */
-
-
-
 #ifndef __HAIKU__
 #ifdef __GNUC__
 // This version has strict type checking for safety.