On Wed, Apr 10, 2019 at 08:51:43PM -0700, Nathan Chancellor wrote:
Hi Greg and Sasha,
Please apply the following mbox files to their respective trees. They contain upstream patches that allow a tip of tree LLD to link an x86 kernel image as well as a patch to avoid using $(LD) to check for the location of binutils, which won't always be accurate when linking with LLD. This was tested with both the upstream defconfig and Android's x86_64_cuttlefish_defconfig in their respective trees (building/linking with both Clang/LLD and GCC/ld.bfd then booting in QEMU).
For 5.0, a simple cherry-pick of commit ad15006cc784 ("kbuild: clang: choose GCC_TOOLCHAIN_DIR not on LD") will do.
Greg, the merge into kernel/common will result in two conflicts:
Makefile: Make the diff match upstream commit ad15006cc784 ("kbuild: clang: choose GCC_TOOLCHAIN_DIR not on LD")
arch/x86/entry/vdso/Makefile: Take the right hand side, effectively replacing common commit 35b779802c2e ("x86: vdso: Fix leaky vdso linker with CC=clang.") with the proper upstream commit 379d98ddf413 ("x86: vdso: Use $LD instead of $CC to link")
Nathan,
I might be missing something, but ad15006cc784 does not touch arch/x86/entry/vdso/Makefile nor does it generate any conflicts.
-- Thanks, Sasha