linux-kernel - [RFC v3 2/3] kvm: selftests: Use the right INSTALL_HDR_PATH when OUTPUT specified and MAKELEVEL is 0

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Date:   Thu, 26 Mar 2020 11:07:49 +0800
From:   Xiaoyao Li <xiaoyao.li@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, Shuah Khan <shuah@...nel.org>
Cc:     kvm@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, Xiaoyao Li <xiaoyao.li@...el.com>
Subject: [RFC v3 2/3] kvm: selftests: Use the right INSTALL_HDR_PATH when OUTPUT specified and MAKELEVEL is 0

Assume linux headers exist in linux_src/usr works with OUTPUT specified
currently, even though headers are installed to $(OUTPUT)/usr based on
lib.mk. Because there are building output in linux_src/usr when
"make headers_install" to prepare headers and they are not cleaned.

Assign the correct path to INSTALL_HDR_PATH is always not bad.

Signed-off-by: Xiaoyao Li <xiaoyao.li@...el.com>
---
 tools/testing/selftests/kvm/Makefile | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 91b41092def6..6a95878b2ab7 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -43,7 +43,15 @@ TEST_GEN_PROGS_s390x += kvm_create_max_vcpus
 TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(UNAME_M))
 LIBKVM += $(LIBKVM_$(UNAME_M))
 
-INSTALL_HDR_PATH = $(top_srcdir)/usr
+ifeq (0,$(MAKELEVEL))
+    ifneq ($(OUTPUT),)
+	INSTALL_HDR_PATH := $(OUTPUT)/usr
+    else
+	INSTALL_HDR_PATH := $(top_srcdir)/usr
+    endif
+else
+	INSTALL_HDR_PATH := $(top_srcdir)/usr
+endif
 LINUX_HDR_PATH = $(INSTALL_HDR_PATH)/include/
 LINUX_TOOL_INCLUDE = $(top_srcdir)/tools/include
 LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/x86/include
-- 
2.20.1