linux-kernel - [PATCH AUTOSEL 5.4 6/6] ARC: build: Try to guess GCC variant of cross compiler

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Message-Id: <20241220171420.512513-6-sashal@kernel.org>
Date: Fri, 20 Dec 2024 12:14:20 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Leon Romanovsky <leonro@...dia.com>,
	Vineet Gupta <vgupta@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	linux-snps-arc@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.4 6/6] ARC: build: Try to guess GCC variant of cross compiler

From: Leon Romanovsky <leonro@...dia.com>

[ Upstream commit 824927e88456331c7a999fdf5d9d27923b619590 ]

ARC GCC compiler is packaged starting from Fedora 39i and the GCC
variant of cross compile tools has arc-linux-gnu- prefix and not
arc-linux-. This is causing that CROSS_COMPILE variable is left unset.

This change allows builds without need to supply CROSS_COMPILE argument
if distro package is used.

Before this change:
$ make -j 128 ARCH=arc W=1 drivers/infiniband/hw/mlx4/
  gcc: warning: ‘-mcpu=’ is deprecated; use ‘-mtune=’ or ‘-march=’ instead
  gcc: error: unrecognized command-line option ‘-mmedium-calls’
  gcc: error: unrecognized command-line option ‘-mlock’
  gcc: error: unrecognized command-line option ‘-munaligned-access’

[1] https://packages.fedoraproject.org/pkgs/cross-gcc/gcc-arc-linux-gnu/index.html
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
Signed-off-by: Vineet Gupta <vgupta@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arc/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index 6f05e509889f..d72d9f4dfc3d 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -6,7 +6,7 @@
 KBUILD_DEFCONFIG := nsim_hs_defconfig
 
 ifeq ($(CROSS_COMPILE),)
-CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux-)
+CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux- arc-linux-gnu-)
 endif
 
 cflags-y	+= -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__
-- 
2.39.5