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authorH. Nikolaus Schaller <hns@goldelico.com>2021-07-08 10:57:10 +0200
committerMasahiro Yamada <masahiroy@kernel.org>2021-08-05 20:52:03 +0900
commit28bbbb9875a35975904e46f9b06fa689d051b290 (patch)
tree7d8387b5185bd9b9df5b87eb97fff62d3791f8eb
parentfa953adfad7cf9c7e30d9ea0e4ccfd38cfb5495d (diff)
mips: Fix non-POSIX regexp
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>
-rw-r--r--arch/mips/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 4e942b7ef022..653befc1b176 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -321,7 +321,7 @@ 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