linux-kernel - Re: [PATCH v2] Kbuild: tiny correction on `make help`

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAK7LNATJP5Ua3bWsxKQFUJ=m7TmOzz168_ZrZ4O4tnvd6mrgjA@mail.gmail.com>
Date:   Wed, 14 Jun 2017 10:15:14 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Cao jin <caoj.fnst@...fujitsu.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Michal Marek <mmarek@...e.com>
Subject: Re: [PATCH v2] Kbuild: tiny correction on `make help`

2017-06-13 18:52 GMT+09:00 Cao jin <caoj.fnst@...fujitsu.com>:
> Yamada-san,
>
>   I have a question on the current top level Makefile. There are
> following lines, I have trouble to understand "firstword x$(MAKEFLAGS)"
> in 2nd line, why there is a 'x' there?
>
>
>   ifneq ($(filter 4.%,$(MAKE_VERSION)),)  # make-4
>   ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)


I do not understand the 'x' either.

Michal suggested the code according to the following:
https://patchwork.kernel.org/patch/3291301/
(I hope Michal can help you.)


My first guess was, it was added just in case $(MAKEFLAGS) is empty.
Actually $(firstword ) seems to work with empty argument, though.



-- 
Best Regards
Masahiro Yamada