build: do not use shell calls to export empty opkg control files, speeds up package...

Patch by Thomas Langer from #8450

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26431 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/include/package-ipkg.mk b/include/package-ipkg.mk
index 2360ac4..9cccff2 100644 (file)
--- a/include/package-ipkg.mk
+++ b/include/package-ipkg.mk
@@ -28,8 +28,10 @@ IPKG_BUILD:= \
 IPKG_STATE_DIR:=$(TARGET_DIR)/usr/lib/opkg
 
 define BuildIPKGVariable
+ifdef Package/$(1)/$(2)
   $(call shexport,Package/$(1)/$(2))
   $(1)_COMMANDS += $(SH_FUNC) var2file "$(call shvar,Package/$(1)/$(2))" $(2);
+endif
 endef
 
 PARENL :=(