check_gcc for -m64, pmap shows shmid

dummy.c

@@ -0,0 +1,31 @@
+// This is to test the compiler.
+
+#include <sys/ioctl.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <curses.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Foul POS defines all sorts of stuff...
+#include <term.h>
+#undef tab
+
+#include <termios.h>
+#include <time.h>
+#include <unistd.h>
+#include <values.h>
+
+int main(int argc, char *argv[]){
+  (void)argc;
+  (void)argv;
+  return 0;
+}