6.12-stable review patch. If anyone has any objections, please let me know.
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From: Björn Töpel bjorn@rivosinc.com
[ Upstream commit 537a2525eaf76ea9b0dca62b994500d8670b39d5 ]
There are a number of tools (bpftool, selftests), that require a "bootstrap" build. Here, a bootstrap build is a build host variant of a target. E.g., assume that you're performing a bpftool cross-build on x86 to riscv, a bootstrap build would then be an x86 variant of bpftool. The typical way to perform the host build variant, is to pass "ARCH=" in a sub-make. However, if a variable has been set with a command argument, then ordinary assignments in the makefile are ignored.
This side-effect results in that ARCH, and variables depending on ARCH are not set. Workaround by overriding ARCH to the host arch, if ARCH is empty.
Fixes: 8859b0da5aac ("tools/bpftool: Fix cross-build") Signed-off-by: Björn Töpel bjorn@rivosinc.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Tested-by: Alexandre Ghiti alexghiti@rivosinc.com Reviewed-by: Jean-Philippe Brucker jean-philippe@linaro.org Reviewed-by: Namhyung Kim namhyung@kernel.org Reviewed-by: Toke Høiland-Jørgensen toke@redhat.com Acked-by: Quentin Monnet qmo@kernel.org Acked-by: Jiri Olsa jolsa@kernel.org Cc: Arnaldo Carvalho de Melo acme@redhat.com Link: https://lore.kernel.org/bpf/20241127101748.165693-1-bjorn@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/scripts/Makefile.arch | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/scripts/Makefile.arch b/tools/scripts/Makefile.arch index f6a50f06dfc45..eabfe9f411d91 100644 --- a/tools/scripts/Makefile.arch +++ b/tools/scripts/Makefile.arch @@ -7,8 +7,8 @@ HOSTARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \ -e s/riscv.*/riscv/ -e s/loongarch.*/loongarch/)
-ifndef ARCH -ARCH := $(HOSTARCH) +ifeq ($(strip $(ARCH)),) +override ARCH := $(HOSTARCH) endif
SRCARCH := $(ARCH)