Sandipan Das <sandipan@xxxxxxxxxxxxx> writes:
> Independent builds of the vm selftests is currently broken
> because commit 7549b3364201 overrides the value of ARCH with
> the machine name from uname. This does not always match the
> architecture names used for tasks like header installation.
>
> E.g. for building tests on powerpc64, we need ARCH=powerpc
> and not ARCH=ppc64 or ARCH=ppc64le. Otherwise, the build
> fails as shown below.
>
> $ uname -m
> ppc64le
>
> $ make -C tools/testing/selftests/vm
> make: Entering directory '/home/sandipan/linux/tools/testing/selftests/vm'
> make --no-builtin-rules ARCH=ppc64le -C ../../../.. headers_install
> make[1]: Entering directory '/home/sandipan/linux'
> Makefile:653: arch/ppc64le/Makefile: No such file or directory
> make[1]: *** No rule to make target 'arch/ppc64le/Makefile'. Stop.
> make[1]: Leaving directory '/home/sandipan/linux'
> ../lib.mk:50: recipe for target 'khdr' failed
> make: *** [khdr] Error 2
> make: Leaving directory '/home/sandipan/linux/tools/testing/selftests/vm'
>
> Fixes: 7549b3364201 ("selftests: vm: Build/Run 64bit tests only on 64bit arch")
> Signed-off-by: Sandipan Das <sandipan@xxxxxxxxxxxxx>
> ---
> tools/testing/selftests/vm/Makefile | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
Tested-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
cheers
> diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
> index 7f9a8a8c31da..3f2e2f0ccbc9 100644
> --- a/tools/testing/selftests/vm/Makefile
> +++ b/tools/testing/selftests/vm/Makefile
> @@ -1,7 +1,7 @@
> # SPDX-License-Identifier: GPL-2.0
> # Makefile for vm selftests
> uname_M := $(shell uname -m 2>/dev/null || echo not)
> -ARCH ?= $(shell echo $(uname_M) | sed -e 's/aarch64.*/arm64/')
> +MACHINE ?= $(shell echo $(uname_M) | sed -e 's/aarch64.*/arm64/')
>
> CFLAGS = -Wall -I ../../../../usr/include $(EXTRA_CFLAGS)
> LDLIBS = -lrt
> @@ -19,7 +19,7 @@ TEST_GEN_FILES += thuge-gen
> TEST_GEN_FILES += transhuge-stress
> TEST_GEN_FILES += userfaultfd
>
> -ifneq (,$(filter $(ARCH),arm64 ia64 mips64 parisc64 ppc64 riscv64 s390x sh64 sparc64 x86_64))
> +ifneq (,$(filter $(MACHINE),arm64 ia64 mips64 parisc64 ppc64 riscv64 s390x sh64 sparc64 x86_64))
> TEST_GEN_FILES += va_128TBswitch
> TEST_GEN_FILES += virtual_address_range
> endif
> --
> 2.17.1
