From: Jed Brown <jed@59A2.org>
Date: Sun, 3 Nov 2013 15:35:03 +0000 (+1700)
Subject: Re: [PATCH 1/1] build: remove trailing '/.' when doing mkdir -p .deps/.
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=d735cb6fbb5c87ce5cf125d21f87a99f85babb88;p=notmuch-archives.git

Re: [PATCH 1/1] build: remove trailing '/.' when doing mkdir -p .deps/.
---

diff --git a/ce/9c0f5e58409d0d30d1d0bd76a6bb18edaa401b b/ce/9c0f5e58409d0d30d1d0bd76a6bb18edaa401b
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+++ b/ce/9c0f5e58409d0d30d1d0bd76a6bb18edaa401b
@@ -0,0 +1,105 @@
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+	Sun,  3 Nov 2013 15:35:07 +0000 (UTC)
+From: Jed Brown <jed@59A2.org>
+To: Tomi Ollila <tomi.ollila@iki.fi>, notmuch@notmuchmail.org
+Subject: Re: [PATCH 1/1] build: remove trailing '/.' when doing mkdir -p
+	.deps/.
+In-Reply-To: <1383487535-21597-1-git-send-email-tomi.ollila@iki.fi>
+References: <1383487535-21597-1-git-send-email-tomi.ollila@iki.fi>
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+Date: Sun, 03 Nov 2013 08:35:03 -0700
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+Cc: tomi.ollila@iki.fi
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+--=-=-=
+Content-Type: text/plain
+
+Tomi Ollila <tomi.ollila@iki.fi> writes:
+
+>  %.o: %.cc $(global_deps)
+> -	@mkdir -p .deps/$(@D)
+> +	@mkdir -p $(patsubst %/.,%,.deps/$(@D))
+>  	$(call quiet,CXX $(CPPFLAGS) $(CXXFLAGS)) -c $(FINAL_CXXFLAGS) $< -o $@ -MD -MP -MF .deps/$*.d
+
+An alternative approach is to use directory marker files [1] to clean up
+the recipes that need output directories and to satisfy Paul's second
+rule of makefiles [2].
+
+.SECONDEXPANSION:
+
+%.o: %.cc $(global_deps) | .deps/$$(@D)/.DIR
+	$(call quiet,CXX $(CPPFLAGS) $(CXXFLAGS)) -c $(FINAL_CXXFLAGS) $< -o $@ -MD -MP -MF .deps/$*.d
+
+%/.DIR:
+	@mkdir -p $(patsubst %/.,%,$(@D))
+	@touch $@
+
+.PRECIOUS: %.DIR
+
+
+
+[1] http://www.cmcrossroads.com/article/making-directories-gnu-make
+[2] http://make.paulandlesley.org/rules.html
+
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