kernel: suppress redundant calls to headers installation

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33421 3c298f89-4303-0410-b956-a3cf2f4a3e73
dtaht · Sep 15, 2012 · 93ca39c · 93ca39c
1 parent 3d260ec
commit 93ca39c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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