From: "H. Nikolaus Schaller" hns@goldelico.com
stable inclusion from stable-5.10.58 commit f76f9caccb464a3c6f8b3ca438433255320ef8eb bugzilla: 176984 https://gitee.com/openeuler/kernel/issues/I4E2P4
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 28bbbb9875a35975904e46f9b06fa689d051b290 ]
When cross compiling a MIPS kernel on a BSD based HOSTCC leads to errors like
SYNC include/config/auto.conf.cmd - due to: .config egrep: empty (sub)expression UPD include/config/kernel.release HOSTCC scripts/dtc/dtc.o - due to target missing
It turns out that egrep uses this egrep pattern:
(|MINOR_|PATCHLEVEL_)
This is not valid syntax or gives undefined results according to POSIX 9.5.3 ERE Grammar
https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html
It seems to be silently accepted by the Linux egrep implementation while a BSD host complains.
Such patterns can be replaced by a transformation like
"(|p1|p2)" -> "(p1|p2)?"
Fixes: 48c35b2d245f ("[MIPS] There is no __GNUC_MAJOR__") Signed-off-by: H. Nikolaus Schaller hns@goldelico.com Signed-off-by: Masahiro Yamada masahiroy@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- arch/mips/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/Makefile b/arch/mips/Makefile index 686990fcc5f0..acab8018ab44 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -320,7 +320,7 @@ KBUILD_LDFLAGS += -m $(ld-emul)
ifdef CONFIG_MIPS CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ - egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \ + egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ sed -e "s/^#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/$$/&&/g') endif