Makefile: rm BUILD target

This is the parent directory for our build system, and having it as part
of the deps makes Make rebuild stuff inside of it arbitrarily, so we
pull it out.

We also silence git shells, to quiet down their noise when running
outside of a git repo; like say in a src tar.gz

Makefile

@@ -13,12 +13,14 @@ CONFIGURE  := $(BUILD)/.B.configure
 BUILDFLAGS := $(BUILD)/.B.buildflags
 BUILDINFO  := git.st8l.com/luxolus/kdnotify/buildinfo
 
-Version  ?= $(shell git describe --tags --abbrev=0)
-Commit   ?= $(shell git rev-parse HEAD)
+Version  ?= $(shell git describe --tags --abbrev=0 2>/dev/null)
+Commit   ?= $(shell git rev-parse HEAD 2>/dev/null)
 Features ?= ""
 Prefix   ?= /bin
 Systemd  ?= /usr/lib/systemd
 
+$(shell mkdir -p $(BUILD))
+
 .DEFAULT_GOAL := help
 .PHONY: help
 help:
@@ -89,19 +91,16 @@ $(BUILD)/$(PROJ): $(CONFIGURE) $(SRC)
 		-buildmode=pie \
 		-ldflags "-linkmode=external -extldflags=$$LDFLAGS $$BUILDFLAGS"
 
-$(CONFIGURE): $(BUILD) $(BUILDFLAGS)
+$(CONFIGURE): $(BUILDFLAGS)
 	@cat $@ >$@
 	@echo "BUILDFLAGS='$$(xargs <$(BUILDFLAGS))'" >>$@
 	@echo "BIN_PATH=$(Prefix)" >>$@
 	@echo "SYSTEMD_PATH=$(Systemd)" >>$@
 
-$(BUILDFLAGS): $(BUILD)
+$(BUILDFLAGS):
 	@cat $@ >$@
 	@echo '-X $(BUILDINFO).Version=$(Version)' >>$@
 	@echo '-X $(BUILDINFO).CommitHash=$(Commit)' >>$@
 	@echo '-X $(BUILDINFO).Features=$(Features)' >>$@
 
-$(BUILD):
-	@mkdir -p $@
-
 # vim: ts=4 sts=4