selftests: Fix build when $(O) points to a relative path

Build of bpf and tc-testing selftests fails when the relative path of
the build directory is specified.

make -C tools/testing/selftests O=build0
make[1]: Entering directory '/linux_mainline/tools/testing/selftests/bpf'
../../../scripts/Makefile.include:4: *** O=build0 does not exist.  Stop.
make[1]: Entering directory '/linux_mainline/tools/testing/selftests/tc-testing'
../../../scripts/Makefile.include:4: *** O=build0 does not exist.  Stop.

Makefiles of bpf and tc-testing include scripts/Makefile.include file.
This file has sanity checking inside it which checks the output path.
The output path is not relative to the bpf or tc-testing. The sanity
check fails. Expand the output path to get rid of this error. The fix is
the same as mentioned in commit 150a27328b68 ("bpf, preload: Fix build
when $(O) points to a relative path").

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 5d9d4dd..2319ec8 100644 (file)
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -177,6 +177,7 @@ all: khdr
                BUILD_TARGET=$$BUILD/$$TARGET;                  \
                mkdir $$BUILD_TARGET  -p;                       \
                $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET       \
+                               O=$(abs_objtree)                \
                                $(if $(FORCE_TARGETS),|| exit); \
                ret=$$((ret * $$?));                            \
        done; exit $$ret;
@@ -184,7 +185,8 @@ all: khdr
 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 \
+                               O=$(abs_objtree);                   \
        done;
 
 hotplug:
@@ -235,6 +237,7 @@ ifdef INSTALL_PATH
        for TARGET in $(TARGETS); do \
                BUILD_TARGET=$$BUILD/$$TARGET;  \
                $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET INSTALL_PATH=$(INSTALL_PATH)/$$TARGET install \
+                               O=$(abs_objtree)                \
                                $(if $(FORCE_TARGETS),|| exit); \
                ret=$$((ret * $$?));            \
        done; exit $$ret;