Bug 2707

Summary: Can't compile linux kernel using buildroot + crosstool-ng
Product: buildroot Reporter: Pepiot Philippe <phil>
Component: OtherAssignee: unassigned
Status: RESOLVED FIXED    
Severity: normal CC: buildroot, yann.morin.1998
Priority: P5    
Version: unspecified   
Target Milestone: ---   
Hardware: PC   
OS: Linux   
Host: Target:
Build:
Attachments: fix missing include of kernel-headers when using crosstool-ng toolchain

Description Pepiot Philippe 2010-10-16 19:26:06 UTC
Created attachment 2605 [details]
fix missing include of kernel-headers when using crosstool-ng toolchain

linux/linux.mk need KERNEL_ARCH defined in toolchain/kernel-headers/kernel-headers.mk included usually by toolchain makefiles, crosstool-ng don't causing an error when we compile the linux kernel.

Fix attached.
Comment 1 Yann E. MORIN 2010-10-17 10:00:44 UTC
Philippe, All,

I believe the correct way would be to declare KERNEL_ARCH somewhere else.

First, the crosstool-NG backend does not need stuff from kernel-headers.mk, so there is no reason to include it.

Second, KERNEL_ARCH is not specific to the kernel-headers used to build the toolchain, even the internal toolchain backend. Indeed, it is used by a few other components: the kernel itself, but also U-Boot, barebox, linux-fusion, ltrace, lm-sensors, pciutils, and bizarely enough, busybox.

That's why I believe KERNEL_ARCH should be moved out of kernel-headers, and to a common place.

Regards,
Yann E. MORIN.
Comment 2 Peter Korsgaard 2010-10-17 21:35:05 UTC
Fixed by moving KERNEL_ARCH to the toplevel Makefile, thanks.