[PATCH] selftests: fix install target to use default install path

From: Shuah Khan
Date: Wed May 08 2019 - 12:27:29 EST

Install target fails when INSTALL_PATH is undefined. Fix install target
to use "output_dir/install as the default install location. "output_dir"
is either the root of selftests directory under kernel source tree or
output directory specified by O= or KBUILD_OUTPUT.

make -C tools/testing/selftests install
<installs under tools/testing/selftests/install>

make O=/tmp/kselftest -C tools/testing/selftests install
<installs under /tmp/kselftest/install>

export KBUILD_OUTPUT=/tmp/kselftest
make -C tools/testing/selftests install
<installs under /tmp/kselftest/install>

In addition, add "all" target as dependency to "install" to build and
install using a single command.

Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
tools/testing/selftests/Makefile | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 9f05448e5e4b..c71a63b923d4 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -163,11 +163,17 @@ clean_hotplug:
make -C pstore run_crash

-INSTALL_PATH ?= install
+# Use $BUILD as the default install root. $BUILD points to the
+# right output location for the following cases:
+# 1. output_dir=kernel_src
+# 2. a separate output directory is specified using O= KBUILD_OUTPUT
+# 3. a separate output directory is specified using KBUILD_OUTPUT
+INSTALL_PATH ?= $(BUILD)/install
ALL_SCRIPT := $(INSTALL_PATH)/run_kselftest.sh

+install: all
@# Ask all targets to install their files
mkdir -p $(INSTALL_PATH)/kselftest