[PATCH v3 0/2] selftests: fix prepending $(OUTPUT) to $(TEST_PROGS)

[PATCH v3 0/2] selftests: fix prepending $(OUTPUT) to $(TEST_PROGS)

[Ilya Leoshkevich]

This patch series fixes the following problem:

linux# make kselftest TARGETS=bpf O=/mnt/linux-build
# selftests: bpf: test_libbpf.sh
# ./test_libbpf.sh: line 23: ./test_libbpf_open: No such file or directory
# test_libbpf: failed at file test_l4lb.o
# selftests: test_libbpf [FAILED]

Patch 1 appends / to $(OUTPUT) in order to make it more uniform with the
rest of the tree.

Patch 2 fixes the problem by prepending $(OUTPUT) to all members of
$(TEST_PROGS).

v1->v2:
- Append / to $(OUTPUT).
- Use $(addprefix) instead of $(foreach).

v2->v3:
- Split the patch in two.
- Improve the commit message.

Ilya Leoshkevich (2):
  selftests: append / to $(OUTPUT)
  selftests: fix prepending $(OUTPUT) to $(TEST_PROGS)

 tools/testing/selftests/Makefile | 16 ++++++++--------
 tools/testing/selftests/lib.mk   |  3 ++-
 2 files changed, 10 insertions(+), 9 deletions(-)

-- 
2.23.0

[PATCH v3 1/2] selftests: append / to $(OUTPUT)

[Ilya Leoshkevich]

$(OUTPUT) is assumed to end with a / everywhere else in the tree, make
this the case for kselftest as well.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 tools/testing/selftests/Makefile | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index c3feccb99ff5..49bcd066907e 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -136,31 +136,31 @@ all: khdr
 	@for TARGET in $(TARGETS); do		\
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
 		mkdir $$BUILD_TARGET  -p;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET;\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET;\
 	done;
 
 run_tests: all
 	@for TARGET in $(TARGETS); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET run_tests;\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET run_tests;\
 	done;
 
 hotplug:
 	@for TARGET in $(TARGETS_HOTPLUG); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET;\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET;\
 	done;
 
 run_hotplug: hotplug
 	@for TARGET in $(TARGETS_HOTPLUG); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET run_full_test;\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET run_full_test;\
 	done;
 
 clean_hotplug:
 	@for TARGET in $(TARGETS_HOTPLUG); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET clean;\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET clean;\
 	done;
 
 run_pstore_crash:
@@ -184,7 +184,7 @@ ifdef INSTALL_PATH
 	install -m 744 kselftest/prefix.pl $(INSTALL_PATH)/kselftest/
 	@for TARGET in $(TARGETS); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install; \
 	done;
 
 	@# Ask all targets to emit their test scripts
@@ -203,7 +203,7 @@ ifdef INSTALL_PATH
 		echo "[ -w /dev/kmsg ] && echo \"kselftest: Running tests in $$TARGET\" >> /dev/kmsg" >> $(ALL_SCRIPT); \
 		echo "cd $$TARGET" >> $(ALL_SCRIPT); \
 		echo -n "run_many" >> $(ALL_SCRIPT); \
-		$(MAKE) -s --no-print-directory OUTPUT=$$BUILD_TARGET -C $$TARGET emit_tests >> $(ALL_SCRIPT); \
+		$(MAKE) -s --no-print-directory OUTPUT=$$BUILD_TARGET/ -C $$TARGET emit_tests >> $(ALL_SCRIPT); \
 		echo "" >> $(ALL_SCRIPT);	    \
 		echo "cd \$$ROOT" >> $(ALL_SCRIPT); \
 	done;
@@ -216,7 +216,7 @@ endif
 clean:
 	@for TARGET in $(TARGETS); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
-		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET clean;\
+		$(MAKE) OUTPUT=$$BUILD_TARGET/ -C $$TARGET clean;\
 	done;
 
 .PHONY: khdr all run_tests hotplug run_hotplug clean_hotplug run_pstore_crash install clean
-- 
2.23.0

[PATCH v3 2/2] selftests: fix prepending $(OUTPUT) to $(TEST_PROGS)

[Ilya Leoshkevich]

Currently the following command fails:

    linux# make kselftest TARGETS=bpf O=/mnt/linux-build
    # selftests: bpf: test_libbpf.sh
    # ./test_libbpf.sh: line 23: ./test_libbpf_open: No such file or directory
    # test_libbpf: failed at file test_l4lb.o
    # selftests: test_libbpf [FAILED]

The current logic prepends $(OUTPUT) only to the first member of
$(TEST_PROGS). After that, run_one() does

   cd `dirname $TEST`

For all tests except the first one, `dirname $TEST` is ., which means
they cannot access the files generated in $(OUTPUT).

Fix by using $(addprefix) to prepend $(OUTPUT) to each member of
$(TEST_PROGS).

Fixes: 1a940687e424 ("selftests: lib.mk: copy test scripts and test files for make O=dir run")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 tools/testing/selftests/lib.mk | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 1c8a1963d03f..27a97a1b4e9e 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -75,7 +75,8 @@ ifdef building_out_of_srctree
 		@rsync -aq $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT)
 	fi
 	@if [ "X$(TEST_PROGS)" != "X" ]; then
-		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(OUTPUT)/$(TEST_PROGS))
+		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \
+				  $(addprefix $(OUTPUT),$(TEST_PROGS)))
 	else
 		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS))
 	fi
-- 
2.23.0