linux-kernel - Re: [PATCH] unicore32: do not evaluate compiler's library path when cleaning

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: <CAKwvOd=0hnjUh9eZFVJhQc4-7dq+T0c9BGEd7UM-dDXVehqOeQ@mail.gmail.com>
Date:   Mon, 27 Apr 2020 10:51:31 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Guan Xuetao <gxt@....edu.cn>,
        Nathan Chancellor <natechancellor@...il.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] unicore32: do not evaluate compiler's library path when cleaning

On Fri, Apr 24, 2020 at 11:07 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> Since commit a83e4ca26af8 ("kbuild: remove cc-option switch from
> -Wframe-larger-than="), 'make ARCH=unicore32 clean' emits error
> messages as follows:
>
>   $ make ARCH=unicore32 clean
>   gcc: error: missing argument to '-Wframe-larger-than='
>   gcc: error: missing argument to '-Wframe-larger-than='
>
> We do not care compiler flags when cleaning.
>
> Use the '=' operator for lazy expansion because we do not use
> GNU_LIBC_A or GNU_LIBGCC_A when cleaning.

So many assignment operators!
https://www.gnu.org/software/make/manual/html_node/Setting.html
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

>
> Fixes: a83e4ca26af8 ("kbuild: remove cc-option switch from -Wframe-larger-than=")
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
>
>  arch/unicore32/lib/Makefile | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/unicore32/lib/Makefile b/arch/unicore32/lib/Makefile
> index 098981a01841..5af06645b8f0 100644
> --- a/arch/unicore32/lib/Makefile
> +++ b/arch/unicore32/lib/Makefile
> @@ -10,12 +10,12 @@ lib-y       += strncpy_from_user.o strnlen_user.o
>  lib-y  += clear_user.o copy_page.o
>  lib-y  += copy_from_user.o copy_to_user.o
>
> -GNU_LIBC_A             := $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libc.a)
> +GNU_LIBC_A             = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libc.a)
>  GNU_LIBC_A_OBJS                := memchr.o memcpy.o memmove.o memset.o
>  GNU_LIBC_A_OBJS                += strchr.o strrchr.o
>  GNU_LIBC_A_OBJS                += rawmemchr.o                  # needed by strrchr.o
>
> -GNU_LIBGCC_A           := $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libgcc.a)
> +GNU_LIBGCC_A           = $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libgcc.a)
>  GNU_LIBGCC_A_OBJS      := _ashldi3.o _ashrdi3.o _lshrdi3.o
>  GNU_LIBGCC_A_OBJS      += _divsi3.o _modsi3.o _ucmpdi2.o _umodsi3.o _udivsi3.o
>
> --
> 2.25.1
>


-- 
Thanks,
~Nick Desaulniers