/*
131 kamil@rugged /tmp $ gcc -O0 memcpy.c                                                              
132 kamil@rugged /tmp $ ./a.out                                                                       
1

133 kamil@rugged /tmp $ gcc -O2 memcpy.c  
134 kamil@rugged /tmp $ ./a.out           
0

135 kamil@rugged /tmp $ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/lto-wrapper
Target: x86_64--netbsd
Configured with: /usr/src/tools/gcc/../../external/gpl3/gcc/dist/configure --target=x86_64--netbsd --enable-long-long --enable-threads --with-bugurl=http://www.NetBSD.org/support/send-pr.html --with-pkgversion='NetBSD nb1 20190930' --with-system-zlib --without-isl --enable-__cxa_atexit --enable-libstdcxx-time=rt --enable-libstdcxx-threads --with-diagnostics-color=auto-if-env --with-tune=nocona --with-default-libstdcxx-abi=new --with-mpc-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/mpc/lib/libmpc --with-mpfr-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/mpfr/lib/libmpfr --with-gmp-lib=/var/obj/mknative/amd64-x86_64/usr/src/external/lgpl3/gmp/lib/libgmp --with-mpc-include=/usr/src/external/lgpl3/mpc/dist/src --with-mpfr-include=/usr/src/external/lgpl3/mpfr/dist/src --with-gmp-include=/usr/src/external/lgpl3/gmp/lib/libgmp/arch/x86_64 --enable-tls --disable-multilib --disable-libstdcxx-pch --build=x86_64--netbsd --host=x86_64--netbsd --with-sysroot=/var/obj/mknative/amd64-x86_64/usr/src/destdir.amd64
Thread model: posix
gcc version 8.3.0 (nb1 20190930) 
136 kamil@rugged /tmp $ uname -a
NetBSD rugged 9.99.46 NetBSD 9.99.46 (GENERIC) #2: Wed Feb 12 11:41:14 CET 2020  root@chieftec:/public/netbsd-root/sys/arch/amd64/compile/GENERIC amd64
*/

#include <string.h>
#include <stddef.h>
#include <stdio.h>

int
statu(void *a, void *b, size_t len)
{
	memcpy(a, b, len);
	return a == NULL;
}

int
main(int argc, char **argv)
{
	char *ptr = (char *)(long)(argc - 1);
	printf("%d\n", statu(ptr, argv, argc - 1));
	return 0;
}