From 0cca61da9934fde1a30300e921335e754fc9716f Mon Sep 17 00:00:00 2001
From: Kévin Le Gouguec <kevin.legouguec@gmail.com>
Date: Tue, 9 Mar 2021 00:06:31 +0100
Subject: Fix parallel build
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Also make order-only prerequisites a bit cleaner.

I have the faintest feeling I'm inching ever closer to 𝕰𝕷𝕯𝕽𝕴𝕿𝕮𝕳
𝕸𝕬𝕶𝕰(1) 𝕸𝕬𝕯𝕹𝕰𝕾𝕾, buuuut it'd be great if it worked though…
---
 Makefile | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 833931f..66f3da1 100644
--- a/Makefile
+++ b/Makefile
@@ -28,19 +28,24 @@ site: $(pages) $(members_pages) $(resources) $(images) $(stylesheets)
 $(OUTDIR) $(images_folders) $(stylesheets_folders):
 	mkdir $@
 
-$(resources): $(OUTDIR)/%: % | $(OUTDIR)
+.SECONDEXPANSION:
+$(resources): $(OUTDIR)/%: % | $$(@D)
 	cp $< $@
 
-$(images): $(OUTDIR)/%: % | $(images_folders)
+.SECONDEXPANSION:
+$(images): $(OUTDIR)/%: % | $$(@D)
 	cp $< $@
 
-$(stylesheets): $(OUTDIR)/%: % | $(stylesheets_folders)
+.SECONDEXPANSION:
+$(stylesheets): $(OUTDIR)/%: % | $$(@D)
 	cp $< $@
 
-$(pages): $(OUTDIR)/%.html: %.html %.sh template.html | $(OUTDIR)
+.SECONDEXPANSION:
+$(pages): $(OUTDIR)/%.html: %.html %.sh template.html | $$(@D)
 	./build.sh $< $*.sh $@
 
-$(members_pages): $(OUTDIR)/%.html: %.membre.in build-member.sh template.html | $(OUTDIR)
+.SECONDEXPANSION:
+$(members_pages): $(OUTDIR)/%.html: %.membre.in build-member.sh template.html | $$(@D)
 	./build-member.sh $< $@
 
 $(OUTDIR)/quatuor.html: quatuor.md
-- 
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