Hi, I'm running into a really weird build issue when building 4.6-rc1 for ARC (although this doesn't seem to be version related) I have 2 source trees and I see a build error in only one with exact same everything. ~/arc/k.org>make mrproper ~/arc/k.org>make ARCH=arc axs103_smp_defconfig O=tmp ~/arc/k.org>cd tmp ~/arc/k.org>make ARCH=arc The issue is rules for asm-generic headers from Kbuild not triggering. ------------>8---------------- GEN ./Makefile scripts/kconfig/conf --silentoldconfig Kconfig drivers/pci/pcie/Kconfig:62:warning: choice value used outside its choice group drivers/pci/pcie/Kconfig:68:warning: choice value used outside its choice group drivers/pci/pcie/Kconfig:75:warning: choice value used outside its choice group CHK include/config/kernel.release UPD include/config/kernel.release Using .. as source for kernel GEN ./Makefile CHK include/generated/uapi/linux/version.h UPD include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h UPD include/generated/utsrelease.h HOSTCC scripts/basic/bin2c CC kernel/bounds.s In file included from ../include/linux/types.h:5:0, from ../include/linux/page-flags.h:8, from ../kernel/bounds.c:9: ../include/uapi/linux/types.h:4:23: fatal error: asm/types.h: No such file or directory #include <asm/types.h> ^ compilation terminated. .././Kbuild:44: recipe for target 'kernel/bounds.s' failed ------------>8------------------- On a different source folder, with exact same kernel version checked out, and a pristine build folder, same instructions as above and I see the headers generated ahead of bound.s compilation, eliding the error. I'm sure it is something stupid at my end.... ------------>8------------------- GEN ./Makefile scripts/kconfig/conf --silentoldconfig Kconfig drivers/pci/pcie/Kconfig:62:warning: choice value used outside its choice group drivers/pci/pcie/Kconfig:68:warning: choice value used outside its choice group drivers/pci/pcie/Kconfig:75:warning: choice value used outside its choice group CHK include/config/kernel.release UPD include/config/kernel.release Using .. as source for kernel GEN ./Makefile WRAP arch/arc/include/generated/asm/auxvec.h ... HOSTCC scripts/basic/bin2c CC kernel/bounds.s ------------>8------------------- TIA for any pointers, -Vineet