lkml.org 
[lkml]   [2022]   [Dec]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] kbuild: Fix compilation error
On Sat, Dec 17, 2022 at 4:07 PM Rong Tao <rtoax@foxmail.com> wrote:
>
> From: Rong Tao <rongtao@cestc.cn>
>
> In the absence of a CONFIG_FUNCTION_ALIGNMENT defined,

Does it happen in the mainline kernel?


CONFIG_FUNCTION_ALIGNMENT is always defined
as far as I understood arch/Kconfig.












> -falign-functions=
> will be given a null value, which results in a compilation error, as
> follows:
>
> $ make -C samples/bpf/
> ...
> CC /home/sdb/Git/linux/samples/bpf/syscall_nrs.s
> gcc: error: missing argument to ‘-falign-functions=’
> make[2]: *** [scripts/Makefile.build:118: /home/sdb/Git/linux/samples
> /bpf/syscall_nrs.s] Error 1
> make[1]: *** [Makefile:1996: /home/sdb/Git/linux/samples/bpf] Error 2
> make[1]: Leaving directory '/home/sdb/Git/linux'
> make: *** [Makefile:269: all] Error 2
>
> Signed-off-by: Rong Tao <rongtao@cestc.cn>
> ---
> Makefile | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/Makefile b/Makefile
> index 6aa709df6bde..57cce4c8f8a2 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1006,9 +1006,11 @@ KBUILD_CFLAGS += $(CC_FLAGS_CFI)
> export CC_FLAGS_CFI
> endif
>
> +ifdef CONFIG_FUNCTION_ALIGNMENT
> ifneq ($(CONFIG_FUNCTION_ALIGNMENT),0)
> KBUILD_CFLAGS += -falign-functions=$(CONFIG_FUNCTION_ALIGNMENT)
> endif
> +endif
>
> # arch Makefile may override CC so keep this after arch Makefile is included
> NOSTDINC_FLAGS += -nostdinc
> --
> 2.38.1
>


--
Best Regards
Masahiro Yamada

\
 
 \ /
  Last update: 2022-12-17 09:01    [W:0.034 / U:0.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site