linux-kernel - Re: [PATCH 1/2] kvm: selftests: Fix no directory error when OUTPUT specified

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Date:   Mon, 23 Mar 2020 09:40:26 -0600
From:   shuah <shuah@...nel.org>
To:     Xiaoyao Li <xiaoyao.li@...el.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     shuah <shuah@...nel.org>
Subject: Re: [PATCH 1/2] kvm: selftests: Fix no directory error when OUTPUT
 specified

On 3/15/20 3:34 AM, Xiaoyao Li wrote:
> When build kvm selftests to an specified directory with
> 
> 	make OUTPUT=~/kvm-selftests
> 
> it encouters following error：

btw lib.mk can't handle relative paths yet. The problems
you are seeing are related to that as well. This relative
path issue should be fixed in lib.mk and not in individual
tests.

> 
> /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
> 
> 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 d91c53b726e6..86797e0242d4 100644
> --- a/tools/testing/selftests/kvm/Makefile
> +++ b/tools/testing/selftests/kvm/Makefile
> @@ -66,6 +66,7 @@ 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))))

lib.mk would have created the directory.

thanks,
-- Shuah