1# SPDX-License-Identifier: GPL-2.0
2
3# When ARCH not overridden for crosscompiling, lookup machine
4ARCH ?= $(shell uname -m 2>/dev/null || echo not)
5
6ifneq (,$(filter $(ARCH),aarch64 arm64))
7ARM64_SUBTARGETS ?= tags signal
8else
9ARM64_SUBTARGETS :=
10endif
11
12CFLAGS := -Wall -O2 -g
13
14# A proper top_srcdir is needed by KSFT(lib.mk)
15top_srcdir = $(realpath ../../../../)
16
17# Additional include paths needed by kselftest.h and local headers
18CFLAGS += -I$(top_srcdir)/tools/testing/selftests/
19
20# Guessing where the Kernel headers could have been installed
21# depending on ENV config
22ifeq ($(KBUILD_OUTPUT),)
23khdr_dir = $(top_srcdir)/usr/include
24else
25# the KSFT preferred location when KBUILD_OUTPUT is set
26khdr_dir = $(KBUILD_OUTPUT)/kselftest/usr/include
27endif
28
29CFLAGS += -I$(khdr_dir)
30
31export CFLAGS
32export top_srcdir
33
34all:
35	@for DIR in $(ARM64_SUBTARGETS); do				\
36		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
37		mkdir -p $$BUILD_TARGET;			\
38		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
39	done
40
41install: all
42	@for DIR in $(ARM64_SUBTARGETS); do				\
43		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
44		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
45	done
46
47run_tests: all
48	@for DIR in $(ARM64_SUBTARGETS); do				\
49		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
50		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
51	done
52
53# Avoid any output on non arm64 on emit_tests
54emit_tests: all
55	@for DIR in $(ARM64_SUBTARGETS); do				\
56		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
57		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
58	done
59
60clean:
61	@for DIR in $(ARM64_SUBTARGETS); do				\
62		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
63		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
64	done
65
66.PHONY: all clean install run_tests emit_tests
67