[PATCH v3 03/12] selftests/nolibc: fix up O= option support

Zhangjin Wu
2023-07-27T20:25:12Z

To avoid pollute the source code tree and avoid mrproper for every
architecture switch, the O= argument must be supported.

Both IMAGE and .config are from the building directory, let's use
objtree instead of srctree for them.

If no O= option specified, means building kernel in source code tree,
objtree should be srctree in such case.

Suggested-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/lkml/ZK0AB1OXH1s2xYsh@1wt.eu/
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
tools/testing/selftests/nolibc/Makefile | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile
index bfea1ea0b4e7..f5680b9ed85c 100644
--- a/tools/testing/selftests/nolibc/Makefile
+++ b/tools/testing/selftests/nolibc/Makefile
@@ -9,6 +9,9 @@ ifeq ($(srctree),)
srctree := $(patsubst %/tools/testing/selftests/,%,$(dir $(CURDIR)))
endif

+# add objtree for O= argument, required by IMAGE and .config
+objtree ?= $(srctree)
+
ifeq ($(ARCH),)
include $(srctree)/scripts/subarch.include
ARCH = $(SUBARCH)
@@ -194,12 +197,12 @@ initramfs: nolibc-test

# common macros for kernel targets
MAKE_KERNEL = $(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE)
-KERNEL_CONFIG = $(srctree)/.config
-KERNEL_IMAGE = $(srctree)/$(IMAGE)
+KERNEL_CONFIG = $(objtree)/.config
+KERNEL_IMAGE = $(objtree)/$(IMAGE)

defconfig:
$(Q)$(MAKE_KERNEL) mrproper $(DEFCONFIG) prepare
- $(Q)$(srctree)/scripts/kconfig/merge_config.sh -O "$(srctree)" -m "$(KERNEL_CONFIG)" $(foreach c,$(EXTCONFIG),$(wildcard $(CURDIR)/configs/$c))
+ $(Q)$(srctree)/scripts/kconfig/merge_config.sh -O "$(objtree)" -m "$(KERNEL_CONFIG)" $(foreach c,$(EXTCONFIG),$(wildcard $(CURDIR)/configs/$c))
$(Q)$(MAKE_KERNEL) KCONFIG_ALLCONFIG="$(KERNEL_CONFIG)" allnoconfig

kernel: initramfs
--
2.25.1