selftests: use printf instead of echo -ne

[ Upstream commit 9e34fad00fc889abbb99d751a4c22cf2bded10df ]

Rather than trying to guess which implementation of "echo" to run with
support for "-ne" options, use "printf" instead of "echo -ne".  It
handles escape characters as a standard feature and it is widespread
among modern shells.

Reported-by: "kernelci.org bot" <bot@kernelci.org>
Suggested-by: David Laight <David.Laight@ACULAB.COM>
Fixes: 3297a4df805d ("kselftests: Enable the echo command to print newlines in Makefile")
Fixes: 79c16b1120fe ("selftests: find echo binary to use -ne options")
Signed-off-by: Guillaume Tucker <guillaume.tucker@collabora.com>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 253596a..aae64eb 100644 (file)
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -231,11 +231,10 @@ ifdef INSTALL_PATH
        @# While building kselftest-list.text skip also non-existent TARGET dirs:
        @# they could be the result of a build failure and should NOT be
        @# included in the generated runlist.
-       ECHO=`which echo`; \
        for TARGET in $(TARGETS); do \
                BUILD_TARGET=$$BUILD/$$TARGET;  \
-               [ ! -d $(INSTALL_PATH)/$$TARGET ] && $$ECHO "Skipping non-existent dir: $$TARGET" && continue; \
-               $$ECHO -ne "Emit Tests for $$TARGET\n"; \
+               [ ! -d $(INSTALL_PATH)/$$TARGET ] && printf "Skipping non-existent dir: $$TARGET\n" && continue; \
+               printf "Emit Tests for $$TARGET\n"; \
                $(MAKE) -s --no-print-directory OUTPUT=$$BUILD_TARGET COLLECTION=$$TARGET \
                        -C $$TARGET emit_tests >> $(TEST_LIST); \
        done;