+GCC_NEED_DECLARATION(gethostname, [#include <unistd.h>])
+GCC_NEED_DECLARATION(kill, [#include <sys/types.h>
+#include <signal.h>])
+GCC_NEED_DECLARATION(snprintf, [#include <stdio.h>])
+GCC_NEED_DECLARATION(vsnprintf, [#include <stdio.h>
+#include <stdarg.h>])
+GCC_NEED_DECLARATION(strdup, [#include <string.h>])
+GCC_NEED_DECLARATION(usleep, [#include <unistd.h>])
+