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tools/build: Fix s390(x) cross-compilation with clang

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[ Upstream commit a40f0cdce7 ]

The heuristic to derive a clang target triple from a GCC one does not work
for s390. GCC uses "s390-linux" while clang expects "s390x-linux" or
"powerz-linux".

Add an explicit override.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://lore.kernel.org/r/20250620-tools-cross-s390-v2-1-ecda886e00e5@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thomas Weißschuh 2025-06-20 13:00:27 +02:00 committed by Greg Kroah-Hartman
parent 30ef45b89a
commit 795789f862
1 changed files with 3 additions and 1 deletions
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4
tools/scripts/Makefile.include
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@ -101,7 +101,9 @@ else ifneq ($(CROSS_COMPILE),)
# Allow userspace to override CLANG_CROSS_FLAGS to specify their own
# sysroots and flags or to avoid the GCC call in pure Clang builds.
ifeq ($(CLANG_CROSS_FLAGS),)
CLANG_CROSS_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%))
CLANG_TARGET := $(notdir $(CROSS_COMPILE:%-=%))
CLANG_TARGET := $(subst s390-linux,s390x-linux,$(CLANG_TARGET))
CLANG_CROSS_FLAGS := --target=$(CLANG_TARGET)
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)gcc 2>/dev/null))
ifneq ($(GCC_TOOLCHAIN_DIR),)
CLANG_CROSS_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))