samples/seccomp: fix dependencies on arch macros

# kbuild trick to avoid linker error. Can be omitted if a module is built.

obj- := dummy.o

hostprogs-$(CONFIG_SECCOMP) := bpf-fancy dropper

bpf-fancy-objs := bpf-fancy.o bpf-helper.o

hostprogs-$(CONFIG_SECCOMP_FILTER) := bpf-fancy dropper bpf-direct

HOSTCFLAGS_bpf-fancy.o += -I$(objtree)/usr/include

HOSTCFLAGS_bpf-fancy.o += -idirafter $(objtree)/include

HOSTCFLAGS_bpf-helper.o += -I$(objtree)/usr/include

HOSTCFLAGS_bpf-helper.o += -idirafter $(objtree)/include

bpf-fancy-objs := bpf-fancy.o bpf-helper.o

HOSTCFLAGS_dropper.o += -I$(objtree)/usr/include

HOSTCFLAGS_dropper.o += -idirafter $(objtree)/include

dropper-objs := dropper.o

# bpf-direct.c is x86-only.

ifeq ($(SRCARCH),x86)

# List of programs to build

hostprogs-$(CONFIG_SECCOMP) += bpf-direct

bpf-direct-objs := bpf-direct.o

endif

HOSTCFLAGS_bpf-direct.o += -I$(objtree)/usr/include

HOSTCFLAGS_bpf-direct.o += -idirafter $(objtree)/include

bpf-direct-objs := bpf-direct.o

# Try to match the kernel target.

ifeq ($(CONFIG_64BIT),)

 * and can serve as a starting point for developing

 * applications using prctl(PR_SET_SECCOMP, 2, ...).

 */

#if defined(__i386__) || defined(__x86_64__)

#define SUPPORTED_ARCH 1

#endif

#if defined(SUPPORTED_ARCH)

#define __USE_GNU 1

#define _GNU_SOURCE 1

#define REG_ARG3	REG_R10

#define REG_ARG4	REG_R8

#define REG_ARG5	REG_R9

#else

#error Unsupported platform

#endif

#ifndef PR_SET_NO_NEW_PRIVS

		payload("Error message going to STDERR\n"));

	return 0;

}

#else	/* SUPPORTED_ARCH */

/*

 * This sample is x86-only.  Since kernel samples are compiled with the

 * host toolchain, a non-x86 host will result in using only the main()

 * below.

 */

int main(void)

{

	return 1;

}

#endif	/* SUPPORTED_ARCH */