[OpenWrt-Devel] [PATCH] image.mk: Add NOTPARALLEL flag to fix parallel build breakage

[Petr Štetiar]

Felix Fietkau <nbd at openwrt.org> [2015-10-30 16:14:49]:

Hi,

> I'd like to find out where the real bug is - what target are you
> building where you hit this error?

it's imx6 target, but probably kirkwood, lantiq, mxs and oxnas are affected
also (just by guessing by output from 'git grep Image/InstallKernel/Template').

I think, that the problem is lying in include/image.mk:

556   kernel_prepare: mkfs_prepare
557         $(call Image/BuildKernel)
558         $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),$(if $(IB),,$(call Image/BuildKernel/Initramfs)))
559         $(call Image/InstallKernel)
560 
561   $(foreach device,$(TARGET_DEVICES),$(call Device,$(device)))
562   $(foreach fs,$(TARGET_FILESYSTEMS) $(fs-subtypes-y),$(call BuildImage/mkfs,$(fs)))

where probably Image/InstallKernel is run in parallel with BuildImage/mkfs and
Image/InstallKernel then touches $(TARGET_DIR)/boot which Image/mkfs/targz is
compressing in another job.

-- ynezz
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