libs/auxfun/image.cpp: In member function ‘bool Image::SavePNG(const char*)’:
libs/auxfun/image.cpp:258:42: error: ‘memset’ was not declared in this scope

--- libs/auxfun/image.cpp
+++ libs/auxfun/image.cpp
@@ -6,6 +6,7 @@
 #include "image.h"
 #include <zlib.h>
 #include <png.h>
+#include <string.h>
 #include <stdlib.h>
 #ifdef _MSC_VER
 #define _USE_MATH_DEFINES 1