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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/tools/testing/selftests/arm64/Makefile
....@@ -1,12 +1,66 @@
11 # SPDX-License-Identifier: GPL-2.0
22 
3
-# ARCH can be overridden by the user for cross compiling
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+# When ARCH not overridden for crosscompiling, lookup machine
44 ARCH ?= $(shell uname -m 2>/dev/null || echo not)
55 
66 ifneq (,$(filter $(ARCH),aarch64 arm64))
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-CFLAGS += -I../../../../usr/include/
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-TEST_GEN_PROGS := tags_test
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-TEST_PROGS := run_tags_test.sh
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+ARM64_SUBTARGETS ?= tags signal pauth fp mte
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+else
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+ARM64_SUBTARGETS :=
1010 endif
1111 
12
-include ../lib.mk
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+CFLAGS := -Wall -O2 -g
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+
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+# A proper top_srcdir is needed by KSFT(lib.mk)
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+top_srcdir = $(realpath ../../../../)
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+
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+# Additional include paths needed by kselftest.h and local headers
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+CFLAGS += -I$(top_srcdir)/tools/testing/selftests/
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+
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+# Guessing where the Kernel headers could have been installed
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+# depending on ENV config
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+ifeq ($(KBUILD_OUTPUT),)
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+khdr_dir = $(top_srcdir)/usr/include
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+else
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+# the KSFT preferred location when KBUILD_OUTPUT is set
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+khdr_dir = $(KBUILD_OUTPUT)/kselftest/usr/include
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+endif
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+
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+CFLAGS += -I$(khdr_dir)
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+
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+export CFLAGS
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+export top_srcdir
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+
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+all:
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+	@for DIR in $(ARM64_SUBTARGETS); do				\
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+		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
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+		mkdir -p $$BUILD_TARGET;			\
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+		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
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+	done
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+
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+install: all
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+	@for DIR in $(ARM64_SUBTARGETS); do				\
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+		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
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+		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
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+	done
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+
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+run_tests: all
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+	@for DIR in $(ARM64_SUBTARGETS); do				\
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+		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
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+		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
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+	done
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+
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+# Avoid any output on non arm64 on emit_tests
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+emit_tests: all
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+	@for DIR in $(ARM64_SUBTARGETS); do				\
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+		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
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+		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
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+	done
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+
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+clean:
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+	@for DIR in $(ARM64_SUBTARGETS); do				\
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+		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
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+		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
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+	done
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+
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+.PHONY: all clean install run_tests emit_tests