add external kernel tree support

[openwrt.git] / include / kernel-defaults.mk

diff --git a/include/kernel-defaults.mk b/include/kernel-defaults.mk
index 69ff8fa..1e0b28b 100644 (file)
--- a/include/kernel-defaults.mk
+++ b/include/kernel-defaults.mk
@@ -32,11 +32,21 @@ endif
 
 # defined in quilt.mk
 Kernel/Patch:=$(Kernel/Patch/Default)
+ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
 define Kernel/Prepare/Default
        bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
        $(Kernel/Patch)
        $(if $(QUILT),touch $(LINUX_DIR)/.quilt_used)
 endef
+else
+define Kernel/Prepare/Default
+       mkdir -p $(KERNEL_BUILD_DIR)
+       if [ -d $(LINUX_DIR) ]; then \
+               rmdir $(LINUX_DIR); \
+       fi
+       ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
+endef
+endif
 
 define Kernel/Configure/2.4
        $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile