Re: [PATCH] doc: Fix parallel build of roff files

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+From: Austin Clements <amdragon@MIT.EDU>\r
+To: "W. Trevor King" <wking@tremily.us>\r
+Subject: Re: [PATCH] doc: Fix parallel build of roff files\r
+In-Reply-To: <20140510151833.GR28634@odin.tremily.us>\r
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+\r
+On Sat, 10 May 2014, "W. Trevor King" <wking@tremily.us> wrote:\r
+> On Thu, Apr 17, 2014 at 04:34:57PM -0400, Austin Clements wrote:\r
+>> +$(DOCBUILDDIR)/.roff.stamp: ${MAN_RST_FILES}\r
+>>  ifeq ($(HAVE_SPHINX),1)\r
+>>     $(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(DOCBUILDDIR)/man\r
+>>     for section in 1 5 7; do \\r
+>> @@ -48,6 +54,7 @@ else\r
+>>     @echo "Fatal: build dependency fail."\r
+>>     @false\r
+>>  endif\r
+>> +   touch ${MAN_ROFF_FILES} $@\r
+>\r
+> I'm poking around in the Makefile, and don't understand why we're\r
+> touching ${MAN_ROFF_FILES} here.  Either they were just created by\r
+> Sphinx/rst2man, or we died with the @false.  I doubt Sphinx or\r
+> prerst2man.py are intelligent enough to not clobber the roff files if\r
+> their content hasn't changed, but I don't see a point in explicitly\r
+> bumping timestamps either.\r
+>\r
+> I think I'll drop the ${MAN_ROFF_FILES} as part of the patch I'm\r
+> working on, but let me know if I'm just missing something.\r
+\r
+I think you're right.  I can't reconstruct why I touched\r
+${MAN_ROFF_FILES} here.  Touching $@ obviously matters, but I think it\r
+should be safe to drop the ${MAN_ROFF_FILES}.\r
+\r
+> Cheers,\r
+> Trevor\r