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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org,
	"H. Nikolaus Schaller" <hns@goldelico.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 05/25] mips: Fix non-POSIX regexp
Date: Fri, 13 Aug 2021 17:06:29 +0200	[thread overview]
Message-ID: <20210813150520.905190010@linuxfoundation.org> (raw)
In-Reply-To: <20210813150520.718161915@linuxfoundation.org>

From: H. Nikolaus Schaller <hns@goldelico.com>

[ 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>
---
 arch/mips/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 252e347958f3..ca010bce5d65 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -269,7 +269,7 @@ 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')
 ifdef CONFIG_64BIT
 CHECKFLAGS		+= -m64
-- 
2.30.2




  parent reply	other threads:[~2021-08-13 15:08 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-13 15:06 [PATCH 4.4 00/25] 4.4.281-rc1 review Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 01/25] ALSA: seq: Fix racy deletion of subscriber Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 02/25] scsi: sr: Return correct event when media event code is 3 Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 03/25] media: videobuf2-core: dequeue if start_streaming fails Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 04/25] net: natsemi: Fix missing pci_disable_device() in probe and remove Greg Kroah-Hartman
2021-08-13 15:06 ` Greg Kroah-Hartman [this message]
2021-08-13 15:06 ` [PATCH 4.4 06/25] bnx2x: fix an error code in bnx2x_nic_load() Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 07/25] net: pegasus: fix uninit-value in get_interrupt_interval Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 08/25] net: vxge: fix use-after-free in vxge_device_unregister Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 09/25] Bluetooth: defer cleanup of resources in hci_unregister_dev() Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 10/25] USB: serial: option: add Telit FD980 composition 0x1056 Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 11/25] USB: serial: ch341: fix character loss at high transfer rates Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 12/25] USB: serial: ftdi_sio: add device ID for Auto-M3 OP-COM v2 Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 13/25] scripts/tracing: fix the bug that cant parse raw_trace_func Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 14/25] media: rtl28xxu: fix zero-length control request Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 15/25] serial: 8250: Mask out floating 16/32-bit bus bits Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 16/25] MIPS: Malta: Do not byte-swap accesses to the CBUS UART Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 17/25] pcmcia: i82092: fix a null pointer dereference bug Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 18/25] reiserfs: add check for root_inode in reiserfs_fill_super Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 19/25] reiserfs: check directory items on read from disk Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 20/25] alpha: Send stop IPI to send to online CPUs Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 21/25] net/qla3xxx: fix schedule while atomic in ql_wait_for_drvr_lock and ql_adapter_reset Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 22/25] pipe: increase minimum default pipe size to 2 pages Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 23/25] USB:ehci:fix Kunpeng920 ehci hardware problem Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 24/25] net: xilinx_emaclite: Do not print real IOMEM pointer Greg Kroah-Hartman
2021-08-13 15:06 ` [PATCH 4.4 25/25] ovl: prevent private clone if bind mount is not allowed Greg Kroah-Hartman
2021-08-13 23:26 ` [PATCH 4.4 00/25] 4.4.281-rc1 review Shuah Khan
2021-08-14 14:20 ` Naresh Kamboju
2021-08-14 18:14 ` Guenter Roeck
2021-08-15 19:51 ` Pavel Machek

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