KERNEL_CONFIG_DIR := arch/arm/configs
endif
+ifeq ($(BUILD_KERNEL_WITH_CLANG),true)
+CROSS_COMPILE := x86_64-linux-androidkernel-
+KERNEL_CLANG_CLAGS := CC=clang HOSTCC=clang CLANG_TRIPLE=x86_64-linux-gnu- PATH=$(abspath $(LLVM_PREBUILTS_BASE)/$(BUILD_OS)-x86/$(LLVM_PREBUILTS_VERSION)/bin):$$PATH
+else
ifeq ($(TARGET_KERNEL_ARCH),x86_64)
+ifeq ($(HOST_OS),darwin)
+CROSS_COMPILE ?= $(abspath prebuilts/gcc/darwin-x86/host/i686-apple-darwin-4.2.1/bin)/i686-apple-darwin11-
+else
CROSS_COMPILE ?= $(abspath prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6/bin)/x86_64-linux-
+endif
else
CROSS_COMPILE ?= $(abspath $(TARGET_TOOLS_PREFIX))
endif
+endif
+
KBUILD_OUTPUT := $(abspath $(TARGET_OUT_INTERMEDIATES)/kernel)
-mk_kernel := + $(hide) $(MAKE) -C $(KERNEL_DIR) O=$(KBUILD_OUTPUT) ARCH=$(TARGET_ARCH) CROSS_COMPILE="$(abspath $(CC_WRAPPER)) $(CROSS_COMPILE)" $(if $(SHOW_COMMANDS),V=1)
+mk_kernel := + $(hide) $(MAKE) $(if $(filter darwin,$(HOST_OS)),-j$$(sysctl -n hw.ncpu) -l$$(($$(sysctl -n hw.ncpu)+2)),-j$$(nproc) -l$$(($$(nproc)+2))) \
+ -C $(KERNEL_DIR) O=$(KBUILD_OUTPUT) ARCH=$(TARGET_ARCH) CROSS_COMPILE="$(abspath $(CC_WRAPPER)) $(CROSS_COMPILE)" $(if $(SHOW_COMMANDS),V=1) \
+ YACC=$(abspath $(BISON)) LEX=$(abspath $(LEX)) \
+ $(KERNEL_CLANG_CLAGS)
KERNEL_CONFIG_FILE := $(if $(wildcard $(TARGET_KERNEL_CONFIG)),$(TARGET_KERNEL_CONFIG),$(KERNEL_DIR)/$(KERNEL_CONFIG_DIR)/$(TARGET_KERNEL_CONFIG))
$(hide) ln -sf ../../../../../../external $(@D)
$(mk_kernel) oldnoconfig
-# bison is needed to build kernel and external modules from source
-BISON := $(HOST_OUT_EXECUTABLES)/bison$(HOST_EXECUTABLE_SUFFIX)
-
BUILT_KERNEL_TARGET := $(KBUILD_OUTPUT)/arch/$(TARGET_ARCH)/boot/$(KERNEL_TARGET)
-$(BUILT_KERNEL_TARGET): $(KERNEL_DOTCONFIG_FILE) | $(BISON)
+$(BUILT_KERNEL_TARGET): $(KERNEL_DOTCONFIG_FILE)
$(mk_kernel) $(KERNEL_TARGET) $(if $(MOD_ENABLED),modules)
$(if $(FIRMWARE_ENABLED),$(mk_kernel) INSTALL_MOD_PATH=$(abspath $(TARGET_OUT)) firmware_install)