From: Mark Wooding <mdw@distorted.org.uk>
Date: Sun, 5 May 2024 11:42:04 +0000 (+0100)
Subject: Makefile: Use order-only prerequisite for making directories.
X-Git-Tag: 1.0.0~4
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/distorted-dkim/commitdiff_plain/e745c3bb1b63aa1d3d2ee4557cb4815e6f1a7655?ds=sidebyside

Makefile: Use order-only prerequisite for making directories.

It looks cooler and involves running fewer processes in parallel builds.
---

diff --git a/Makefile b/Makefile
index 6e0ee10..2add093 100644
--- a/Makefile
+++ b/Makefile
@@ -68,10 +68,11 @@ all: $(TARGETS)
 clean::; rm -f $(TARGETS)
 
 ## Installation.
+%/:; install -d $@
+
 INSTALLS		 = $(addprefix install/, $(INSTDIRS))
 install: $(INSTALLS)
-$(INSTALLS): install/%: $$($$*_FILES)
-	install -d $($*dir)
+$(INSTALLS): install/%: $$($$*_FILES) | $$($$*dir)/
 	$($*_INSTCMD) $+
 
 UNINSTALLS		 = $(addprefix uninstall/, $(INSTDIRS))