diff options
| author | Greg Hackmann <ghackmann@google.com> | 2016-10-25 13:59:59 -0700 |
|---|---|---|
| committer | Greg Hackmann <ghackmann@google.com> | 2017-10-09 14:00:14 -0700 |
| commit | f0907aa15ed9f9c7541bb244ed3f52c376ced19c (patch) | |
| tree | 8dc36249acda05778150658918a6637109e7db7b | |
| parent | e9186826bb135f8cef70cb21689291cd8e6961af (diff) | |
ANDROID: Kbuild, LLVMLinux: allow overriding clang target triple
Android has an unusual setup where the kernel needs to target
[arch]-linux-gnu to avoid Android userspace-specific flags and
optimizations, but AOSP doesn't ship a matching binutils.
Add a new variable CLANG_TRIPLE which can override the "-target" triple
used to compile the kernel, while using a different CROSS_COMPILE to
pick the binutils/gcc installation. For Android you'd do something
like:
export CLANG_TRIPLE=aarch64-linux-gnu-
export CROSS_COMPILE=aarch64-linux-android-
If you don't need something like this, leave CLANG_TRIPLE unset and it
will default to CROSS_COMPILE.
Change-Id: Ib544c37f4ee4ed005437471b2984486a3e7c0da7
Signed-off-by: Greg Hackmann <ghackmann@google.com>
| -rw-r--r-- | Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -695,7 +695,8 @@ KBUILD_CFLAGS += $(stackp-flag) ifeq ($(cc-name),clang) ifneq ($(CROSS_COMPILE),) -CLANG_TARGET := -target $(notdir $(CROSS_COMPILE:%-=%)) +CLANG_TRIPLE ?= $(CROSS_COMPILE) +CLANG_TARGET := -target $(notdir $(CLANG_TRIPLE:%-=%)) GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..) endif ifneq ($(GCC_TOOLCHAIN),) |