kernel: suppress redundant calls to headers installation

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33421 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/include/kernel-defaults.mk b/include/kernel-defaults.mk
index 1cb8b44..8075079 100644 (file)
--- a/include/kernel-defaults.mk
+++ b/include/kernel-defaults.mk
@@ -106,7 +106,7 @@ define Kernel/Configure/Default
        $(SCRIPT_DIR)/kconfig.pl 'm+' '+' $(LINUX_DIR)/.config.target /dev/null $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
        $(call Kernel/SetInitramfs)
        rm -rf $(KERNEL_BUILD_DIR)/modules
-       $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
+       [ -d $(LINUX_DIR)/user_headers ] || $(MAKE) $(KERNEL_MAKEOPTS) INSTALL_HDR_PATH=$(LINUX_DIR)/user_headers headers_install
        $(SH_FUNC) grep '=[ym]' $(LINUX_DIR)/.config | LC_ALL=C sort | md5s > $(LINUX_DIR)/.vermagic
 endef