speed up Makefile

Speed up the Makefile by removing variable references from the release
targets.  Now, the variables will only be (lazily) evaluated when they
are actually needed and not for each invocation of the Makefile which
has it down considerably.

Fixes: #4829
Signed-off-by: Valentin Rothberg <[email protected]>

Makefile

@@ -394,7 +394,7 @@ release.txt:
 		echo -n " $$field"; done >> "$@"
 	echo "" >> "$@"
 
-podman-v$(RELEASE_NUMBER).tar.gz: binaries docs release.txt
+podman-release.tar.gz: binaries docs release.txt
 	$(eval TMPDIR := $(shell mktemp -d -p '' podman_XXXX))
 	$(eval SUBDIR := podman-v$(RELEASE_NUMBER))
 	mkdir -p "$(TMPDIR)/$(SUBDIR)"
@@ -404,8 +404,8 @@ podman-v$(RELEASE_NUMBER).tar.gz: binaries docs release.txt
 	tar -czvf $@ --xattrs -C "$(TMPDIR)" "./release.txt" "./$(SUBDIR)"
 	-rm -rf "$(TMPDIR)"
 
-# Must call make in-line: Dependency-spec. w/ wild-card also consumes variable value.
-podman-remote-v$(RELEASE_NUMBER)-%.zip:
+# Must call make in-line: Dependency-spec. w/ wild-card.
+podman-remote-release-%.zip:
 	$(MAKE) podman-remote-$* install-podman-remote-$*-docs release.txt \
 		RELEASE_BASENAME=$(shell hack/get_release_info.sh REMOTENAME) \
 		RELEASE_DIST=$* RELEASE_DIST_VER="-"
@@ -424,12 +424,12 @@ podman-remote-v$(RELEASE_NUMBER)-%.zip:
 .PHONY: podman-release
 podman-release:
 	rm -f release.txt
-	$(MAKE) podman-v$(RELEASE_NUMBER).tar.gz
+	$(MAKE) podman-release.tar.gz
 
 .PHONY: podman-remote-%-release
 podman-remote-%-release:
 	rm -f release.txt
-	$(MAKE) podman-remote-v$(RELEASE_NUMBER)-$*.zip
+	$(MAKE) podman-remote-release-$*.zip
 
 .PHONY: docker-docs
 docker-docs: docs