aarch64-linux-gnu-4.9/aarch64-linux-gnu/libc/usr/include/bits/a.out.h - toolchains/linux-x86/gcc - Git at Google

 #ifndef __A_OUT_GNU_H__
 # error "Never use <bits/a.out.h> directly; include <a.out.h> instead."
 #endif

 /* Signal to users of this header that this architecture really doesn't
    support a.out binary format.  */
 #define __NO_A_OUT_SUPPORT 1
	#ifndef __A_OUT_GNU_H__
	# error "Never use <bits/a.out.h> directly; include <a.out.h> instead."
	#endif

	/* Signal to users of this header that this architecture really doesn't
	support a.out binary format. */
	#define __NO_A_OUT_SUPPORT 1