My recent commit d2036f30cfe1 ("scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target"), contained a bug in that when it checks if KBUILD_DEFCONFIG is a file it forgets to prepend $(srctree) to the path. This causes the build to fail when building out of tree (with O=), and when the value of KBUILD_DEFCONFIG is 'defconfig'. In that case we will fail to find the 'defconfig' file, because we look in the build directory not $(srctree), and so we will call Make again with 'defconfig' as the target. From there we loop infinitely calling 'make defconfig' again and again. The fix is simple, we need to look for the file under $(srctree).
Unified · Split
| @@ -96,7 +96,7 @@ savedefconfig: $(obj)/conf · 95 unmodified lines | ||
| 96 | 96 | defconfig: $(obj)/conf |
| 97 | 97 | ifeq ($(KBUILD_DEFCONFIG),) |
| 98 | 98 | $< $(silent) --defconfig $(Kconfig) |
| 99 | −else ifneq ($(wildcard arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)),) | |
| 99 | +else ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)),) | |
| 100 | 100 | @$(kecho) "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'" |
| 101 | 101 | $(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig) |
| 102 | 102 | else |