lkml.org 
[lkml]   [2022]   [Jul]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v2 1/2] kbuild: pass jobserver to cmd_ld_vmlinux.o
On Tue, Jul 19, 2022 at 5:41 PM Jiri Slaby <jslaby@suse.cz> wrote:
>
> Until the link-vmlinux.sh split (cf. the commit below), the linker was
> run with jobserver set in MAKEFLAGS. After the split, the command in
> Makefile.vmlinux_o is not prefixed by "+" anymore, so this information
> is lost.
>
> Restore it as linkers working in parallel (esp. the LTO ones) make a use
> of it. In this case, it is gcc producing this warning otherwise:
> lto-wrapper: warning: jobserver is not available: ‘--jobserver-auth=’ is not present in ‘MAKEFLAGS’
>
> Cc: Sedat Dilek <sedat.dilek@gmail.com>
> Cc: Masahiro Yamada <masahiroy@kernel.org>
> Cc: Michal Marek <michal.lkml@markovi.net>
> Cc: Nick Desaulniers <ndesaulniers@google.com>
> Cc: Signed-off-by: Martin Liska <mliska@suse.cz>
> Fixes: 5d45950dfbb1 (kbuild: move vmlinux.o link to scripts/Makefile.vmlinux_o)
> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
> ---
>
> Notes:
> [v2] only commit message updated


Did you read my previous email?

https://lore.kernel.org/linux-kbuild/CAK7LNAS46hrVh3FNiHHL8_Hqp85VgWnsHyjQ4t-TFH_H344NOg@mail.gmail.com/






>
> scripts/Makefile.vmlinux_o | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o
> index 84019814f33f..886db0659d9c 100644
> --- a/scripts/Makefile.vmlinux_o
> +++ b/scripts/Makefile.vmlinux_o
> @@ -65,7 +65,7 @@ define rule_ld_vmlinux.o
> endef
>
> vmlinux.o: $(initcalls-lds) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE
> - $(call if_changed_rule,ld_vmlinux.o)
> + +$(call if_changed_rule,ld_vmlinux.o)
>
> targets += vmlinux.o
>
> --
> 2.37.1
>


--
Best Regards
Masahiro Yamada

\
 
 \ /
  Last update: 2022-07-19 11:18    [W:1.045 / U:0.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site