On Fri, Jan 14, 2022 at 02:14:02PM +0000, Paul Barker wrote: > Hi folks, > > Please backport commit f634ca650f72 "kbuild: Add $(KBUILD_HOSTLDFLAGS) to > 'has_libelf' test" to stable series 5.10.y, 5.4.y & 4.19.y. > > This backport is needed to fix builds with CONFIG_UNWINDER_ORC=y where > HOSTLDFLAGS is given on the make command line containing library paths > needed to link against libelf. The issue was found when trying to build > stable kernel branches for x86-64 using Yocto Project after commit > 7fd06a57a1d9 "kernel: Rework kernel make flag to variable mappings" was > added to openembedded-core back in October. > > The backport to 5.10.y is trivial. The backports to 5.4.y & 4.19.y need a > minor tweak so I'll send patches for those following this email. > > The build failure is also seen in 4.14.y but I can't see a trivial way to > address this as KBUILD_HOSTLDFLAGS does not exist in 4.14.y and backporting > the commit which introduces KBUILD_HOSTLDFLAGS would change several other > kbuild areas. I'm happy to workaround this locally by disabling > CONFIG_UNWINDER_ORC for 4.14.y builds but it may be worth considering > alternative fixes for this branch. Added to 4.19.y queue right now. Will add to 5.4.y queue once the next release is out as it is currently in -rc status. thanks, greg k-h
