linux-kernel - Re: [PATCH RESEND] tools/mm: fix undefined reference to pthread

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Message-ID: <e4027374-88a9-9484-1619-8c3f887a58ca@huaweicloud.com>
Date:   Thu, 31 Aug 2023 09:13:24 +0800
From:   Xie XiuQi <xiexiuqi@...weicloud.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     akpm@...ux-foundation.org, irogers@...gle.com, acme@...hat.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Yang Yingliang <yangyingliang@...wei.com>
Subject: Re: [PATCH RESEND] tools/mm: fix undefined reference to pthread_once

Hi,

On 2023/8/28 20:58, Matthew Wilcox wrote:
> On Mon, Aug 28, 2023 at 08:21:57PM +0800, Xie XiuQi wrote:
>> diff --git a/tools/mm/Makefile b/tools/mm/Makefile
>> index 6c1da51f4177..9997b2e401ae 100644
>> --- a/tools/mm/Makefile
>> +++ b/tools/mm/Makefile
>> @@ -9,7 +9,7 @@ LIB_DIR = ../lib/api
>>  LIBS = $(LIB_DIR)/libapi.a
>>  
>>  CFLAGS += -Wall -Wextra -I../lib/
>> -LDFLAGS += $(LIBS)
>> +LDFLAGS += $(LIBS) -lpthread
> 
> Is this the right fix?  I'm pretty sure you're suppose to use -pthread
> in CFLAGS in case there are other things the compiler/linker/whatever
> need.
> 

Thanks for your comment. I'll fix it and send v2.

> '-pthread'
>      Define additional macros required for using the POSIX threads
>      library.  You should use this option consistently for both
>      compilation and linking.  This option is supported on GNU/Linux
>      targets, most other Unix derivatives, and also on x86 Cygwin and
>      MinGW targets.
>