kernel: Allow specifying a custom linker binary
* This is needed for using LLVM LLD ( and ThinLTO )
Change-Id: If603274326f0ff22f967455847ffe1c595f04aa5
diff --git a/build/tasks/kernel.mk b/build/tasks/kernel.mk
index ba70f29..b5690d0 100644
--- a/build/tasks/kernel.mk
+++ b/build/tasks/kernel.mk
@@ -43,6 +43,8 @@
#
# KERNEL_CC = The C Compiler used. This is automatically set based
# on whether the clang version is set, optional.
+# KERNEL_LD = The Linker used. This is automatically set based
+# on whether the clang/gcc version is set, optional.
#
# KERNEL_CLANG_TRIPLE = Target triple for clang (e.g. aarch64-linux-gnu-)
# defaults to arm-linux-gnu- for arm
@@ -183,6 +185,9 @@
ifeq ($(KERNEL_CC),)
KERNEL_CC := CC="$(CCACHE_BIN) clang"
endif
+ ifeq ($(KERNEL_LD),)
+ KERNEL_LD :=
+ endif
endif
ifneq ($(TARGET_KERNEL_MODULES),)
@@ -200,7 +205,7 @@
# $(1): output path (The value passed to O=)
# $(2): target to build (eg. defconfig, modules, dtbo.img)
define internal-make-kernel-target
-$(PATH_OVERRIDE) $(KERNEL_MAKE_CMD) $(KERNEL_MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_BUILD_OUT_PREFIX)$(1) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(KERNEL_CLANG_TRIPLE) $(KERNEL_CC) $(2)
+$(PATH_OVERRIDE) $(KERNEL_MAKE_CMD) $(KERNEL_MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_BUILD_OUT_PREFIX)$(1) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(KERNEL_CLANG_TRIPLE) $(KERNEL_CC) $(KERNEL_LD) $(2)
endef
# Make a kernel target