linux-kernel - [RFC v3 1/3] kvm: selftests: Fix no directory error when OUTPUT specified

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Date:   Thu, 26 Mar 2020 11:07:48 +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 1/3] kvm: selftests: Fix no directory error when OUTPUT specified

When build kvm selftests to an specified directory with

	make OUTPUT=/home/lxy/kvm-selftests

it encouters following error：

  /usr/bin/ld: cannot open output file
  /home/lxy/kvm-selftests/x86_64/cr4_cpuid_sync_test: No such file or
  directory
  collect2: error: ld returned 1 exit status
  make: *** [../lib.mk:141:
  /home/lxy/kvm-selftests/x86_64/cr4_cpuid_sync_test] Error 1

Use "mkdir -p" to create the directory to fix this issue.

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

diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 67abc1dd50ee..91b41092def6 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -65,6 +65,7 @@ LDFLAGS += -pthread $(no-pie-option) $(pgste-option)
 # After inclusion, $(OUTPUT) is defined and
 # $(TEST_GEN_PROGS) starts with $(OUTPUT)/
 include ../lib.mk
+x := $(shell mkdir -p $(sort $(dir $(TEST_GEN_PROGS))))
 
 STATIC_LIBS := $(OUTPUT)/libkvm.a
 LIBKVM_OBJ := $(patsubst %.c, $(OUTPUT)/%.o, $(LIBKVM))
-- 
2.20.1