netdev - Re: [PATCH] netfilter: fix make target xt

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Date:   Wed, 6 May 2020 14:55:19 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Huang Qijun <dknightjun@...il.com>
Cc:     Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, yhs@...com,
        Andrii Nakryiko <andriin@...com>,
        John Fastabend <john.fastabend@...il.com>,
        kpsingh@...omium.org, NetFilter <netfilter-devel@...r.kernel.org>,
        coreteam@...filter.org,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, bpf@...r.kernel.org
Subject: Re: [PATCH] netfilter: fix make target xt_TCPMSS.o error.

On Tue, May 5, 2020 at 11:52 PM Huang Qijun <dknightjun@...il.com> wrote:
>
> When compiling netfilter, there will be an error
> "No rule to make target 'net/netfilter/xt_TCPMSS.o'",
> because the xt_TCPMSS.c in the makefile is uppercase,
> and the file name of the source file (xt_tcpmss.c) is lowercase.
> Therefore, change the xt_TCPMSS.c name in the makefile to all lowercase.

This is what you will get when you compile Linux kernel
on a case-insensitive filesystem like MacOS.

Please use a case-sensitive one.