[B][SRU][PATCH 2/5] selftests: Makefile set KSFT_TAP_LEVEL to prevent nested TAP headers

[Po-Hsu Lin]

From: Shuah Khan <shuahkh at osg.samsung.com>

BugLink: https://bugs.launchpad.net/bugs/1949889

Export KSFT_TAP_LEVEL and add TAP Header echo to the run_kselftest.sh
script from emit_tests target handling.

Signed-off-by: Shuah Khan <shuahkh at osg.samsung.com>
(backported from commit 44f013522c3abbfb86e940026e3409dbb6e4317d)
[PHLin: context adjustment, can be applied with git cp but not git am -C2]
Signed-off-by: Po-Hsu Lin <po-hsu.lin at canonical.com>
---
 tools/testing/selftests/Makefile | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 126e2ef..48a0bbf 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -68,6 +68,12 @@ ifndef BUILD
   BUILD := $(shell pwd)
 endif
 
+# KSFT_TAP_LEVEL is used from KSFT framework to prevent nested TAP header
+# printing from tests. Applicable to run_tests case where run_tests adds
+# TAP header prior running tests and when a test program invokes another
+# with system() call. Export it here to cover override RUN_TESTS defines.
+export KSFT_TAP_LEVEL=`echo 1`
+
 export BUILD
 all:
 	@for TARGET in $(TARGETS); do		\
@@ -127,10 +133,12 @@ ifdef INSTALL_PATH
 	echo "else" >> $(ALL_SCRIPT)
 	echo "  OUTPUT=/dev/stdout" >> $(ALL_SCRIPT)
 	echo "fi" >> $(ALL_SCRIPT)
+	echo "export KSFT_TAP_LEVEL=`echo 1`" >> $(ALL_SCRIPT)
 
 	for TARGET in $(TARGETS); do \
 		BUILD_TARGET=$$BUILD/$$TARGET;	\
-		echo "echo ; echo Running tests in $$TARGET" >> $(ALL_SCRIPT); \
+		echo "echo ; echo TAP version 13" >> $(ALL_SCRIPT);	\
+		echo "echo Running tests in $$TARGET" >> $(ALL_SCRIPT); \
 		echo "echo ========================================" >> $(ALL_SCRIPT); \
 		echo "[ -w /dev/kmsg ] && echo \"kselftest: Running tests in $$TARGET\" >> /dev/kmsg" >> $(ALL_SCRIPT); \
 		echo "cd $$TARGET" >> $(ALL_SCRIPT); \
-- 
2.7.4