[PATCH 4/7] kselftest/arm64: keep building and installing after a subdirectory fails

[Sasha Levin <sashal@kernel.org>]

The arm64 suite builds and installs its subdirectories in shell loops
whose status is that of the last subdirectory. A failure in an earlier
subdirectory is therefore lost unless FORCE_TARGETS is set, while a
failure in the last one fails "make all" and, through "install: all",
drops the installation of every other arm64 test as well.

Make each loop fail only when no subdirectory succeeds, which matches
how the top-level selftests Makefile treats its targets, and keep
stopping at the first failure when FORCE_TARGETS is set. When a build
report is requested, record each subdirectory as arm64/<subdir> so that
a partially built suite is visible even though make succeeds.

Invoke the subdirectories with $(MAKE) rather than make. The command
line variables already reach them through MAKEFLAGS either way, but
$(MAKE) lets them use the parent's jobserver and makes -n, -t and -q
apply to them.

Fixes: 313a4db7f338 ("kselftest: arm64: extend toplevel skeleton Makefile")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/testing/selftests/arm64/Makefile | 43 +++++++++++++++++---------
 1 file changed, 29 insertions(+), 14 deletions(-)

diff --git a/tools/testing/selftests/arm64/Makefile b/tools/testing/selftests/arm64/Makefile
index e456f3b62fa13..c787e848d4718 100644
--- a/tools/testing/selftests/arm64/Makefile
+++ b/tools/testing/selftests/arm64/Makefile
@@ -26,38 +26,53 @@ OUTPUT ?= $(CURDIR)
 export CFLAGS
 export top_srcdir
 
+include $(top_srcdir)/tools/testing/selftests/build_report.mk
+
 all:
-	@for DIR in $(ARM64_SUBTARGETS); do				\
+	@ret=$(if $(ARM64_SUBTARGETS),1,0);				\
+	for DIR in $(ARM64_SUBTARGETS); do				\
 		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
-		mkdir -p $$BUILD_TARGET;			\
-		make OUTPUT=$$BUILD_TARGET -C $$DIR $@		\
-			$(if $(FORCE_TARGETS),|| exit); \
-	done
+		mkdir -p $$BUILD_TARGET &&			\
+		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$DIR $@;	\
+		status=$$?;					\
+		$(call ksft_record_build_status,all,arm64/$$DIR); \
+		$(if $(FORCE_TARGETS),[ $$status -eq 0 ] || exit $$status;) \
+		[ $$status -eq 0 ] && ret=0;			\
+	done; exit $$ret
 
 install: all
-	@for DIR in $(ARM64_SUBTARGETS); do				\
+	@ret=$(if $(ARM64_SUBTARGETS),1,0);				\
+	for DIR in $(ARM64_SUBTARGETS); do				\
 		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
-		make OUTPUT=$$BUILD_TARGET -C $$DIR $@		\
-			$(if $(FORCE_TARGETS),|| exit); \
-	done
+		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$DIR $@;	\
+		status=$$?;					\
+		$(call ksft_record_build_status,install,arm64/$$DIR); \
+		$(if $(FORCE_TARGETS),[ $$status -eq 0 ] || exit $$status;) \
+		[ $$status -eq 0 ] && ret=0;			\
+	done; exit $$ret
 
 run_tests: all
 	@for DIR in $(ARM64_SUBTARGETS); do				\
 		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
-		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
+		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$DIR $@;	\
 	done
 
 # Avoid any output on non arm64 on emit_tests
 emit_tests:
-	@for DIR in $(ARM64_SUBTARGETS); do				\
+	@ret=$(if $(ARM64_SUBTARGETS),1,0);				\
+	for DIR in $(ARM64_SUBTARGETS); do				\
 		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
-		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
-	done
+		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$DIR $@;	\
+		status=$$?;					\
+		$(call ksft_record_build_status,install,arm64/$$DIR); \
+		$(if $(FORCE_TARGETS),[ $$status -eq 0 ] || exit $$status;) \
+		[ $$status -eq 0 ] && ret=0;			\
+	done; exit $$ret
 
 clean:
 	@for DIR in $(ARM64_SUBTARGETS); do				\
 		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
-		make OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
+		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$DIR $@;	\
 	done
 
 .PHONY: all clean install run_tests emit_tests
-- 
2.53.0