#ifndef PLATFORM_H
#define PLATFORM_H
+/* define keywords for supported main platforms */
+
#if defined(MSDOS)
#define PLATFORM_MSDOS
#elif defined(WIN32)
/* define additional keywords for several Unix platforms */
+#if defined(linux)
+#define PLATFORM_LINUX
+#endif
+
#if defined(__FreeBSD__)
#define PLATFORM_FREEBSD
#endif