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Date: Wed, 16 Nov 2022 09:42:11 +0800 From: Huacai Chen <chenhuacai@...nel.org> To: Xi Ruoyao <xry111@...111.site> Cc: Tiezhu Yang <yangtiezhu@...ngson.cn>, WANG Xuerui <kernel@...0n.name>, loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org Subject: Re: [PATCH] LoongArch: Makefile: use "grep -E" instead of "egrep" Queued for loongarch-fixes, thanks. Huacai On Tue, Nov 15, 2022 at 10:28 PM Xi Ruoyao <xry111@...111.site> wrote: > > On Tue, 2022-11-15 at 18:02 +0800, Tiezhu Yang wrote: > > The latest version of grep claims the egrep is now obsolete so the > > build > > now contains warnings that look like: > > egrep: warning: egrep is obsolescent; using grep -E > > fix this up by moving the LoongArch Makefile to use "grep -E" instead. > > For future reference: this warning message is imprecise because on some > non-POSIX platforms grep does not support -E (see "Limitations of Usual > Tools" in autoconf info page). > > However (1) we are already using -w, which is not guaranteed to be > supported as well; (2) I don't think anyone will build LoongArch kernel > on such an old non-POSIX system. > > So LGTM. > > > Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn> > > --- > > arch/loongarch/Makefile | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile > > index a0fc1f9..5232d8c 100644 > > --- a/arch/loongarch/Makefile > > +++ b/arch/loongarch/Makefile > > @@ -97,7 +97,7 @@ KBUILD_LDFLAGS += -m $(ld-emul) > > > > ifdef CONFIG_LOONGARCH > > CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | > > \ > > - egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ > > + grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ > > sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e > > 's/\$$/&&/g') > > endif > > > > -- > Xi Ruoyao <xry111@...111.site> > School of Aerospace Science and Technology, Xidian University
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