image.mk: use new pure make functions for sanitizing image filenames

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 48106

diff --git a/include/image.mk b/include/image.mk
index cebe42e9d0f99e01a44c425026c6f650615b53c4..5ef800234bc4004b6524251523a28ab94d2d71e7 100644 (file)
--- a/include/image.mk
+++ b/include/image.mk
@@ -18,17 +18,7 @@ KDIR=$(KERNEL_BUILD_DIR)
 KDIR_TMP=$(KDIR)/tmp
 DTS_DIR:=$(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/dts
 
-define toupper
-$(shell echo $(1) | tr '[:lower:]' '[:upper:]')
-endef
-
-define tolower
-$(shell echo $(1) | tr '[:upper:]' '[:lower:]')
-endef
-
-define sanitize
-$(shell echo $(call tolower,$(1)) | sed 's/_/-/g')
-endef
+sanitize = $(call tolower,$(subst _,-,$(1)))
 
 DIST_SANITIZED:=$(call sanitize,$(VERSION_DIST))
 EXTRA_NAME_SANITIZED=$(call sanitize,$(EXTRA_IMAGE_NAME))