cat -v harmful stuff
Autohell
One of my favorite subjects, the total stupidity and idioticy of the gnu autotools. Thanks to sqweek for this gem he found in busybox:
/* Lie to autoconf when it starts asking stupid questions. */
if (argc == 2 && !strcmp(argv[1], "--version")) {
puts("This is not GNU sed version 4.0");
return 0;
}