X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/23f0f29a8e0198f5b3fb0d41ca8144d84ec80b81..eacbaf7ca0fc16e2cc873393cc5bef72ab8509ef:/rules.mk?ds=inline

diff --git a/rules.mk b/rules.mk
index 23445bfae..d3521649a 100644
--- a/rules.mk
+++ b/rules.mk
@@ -249,6 +249,16 @@ define include_mk
 $(eval -include $(if $(DUMP),,$(STAGING_DIR)/mk/$(strip $(1))))
 endef
 
+# Execute commands under flock
+# $(1) => The shell expression.
+# $(2) => The lock name. If not given, the global lock will be used.
+define locked
+	SHELL= \
+	$(STAGING_DIR_HOST)/bin/flock \
+		$(TMP_DIR)/.$(if $(2),$(strip $(2)),global).flock \
+		-c '$(subst ','\'',$(1))'
+endef
+
 # file extension
 ext=$(word $(words $(subst ., ,$(1))),$(subst ., ,$(1)))