Re: [PATCH] vim: simplify build

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+From: Tomi Ollila <tomi.ollila@iki.fi>\r
+To: Felipe Contreras <felipe.contreras@gmail.com>\r
+Subject: Re: [PATCH] vim: simplify build\r
+In-Reply-To:\r
+ <CAMP44s0icH2UfnmFJ9=DDGKUzs4jNLHdnHBZ9Yxnd-Ka2nor_A@mail.gmail.com>\r
+References: <1334751115-7216-1-git-send-email-felipe.contreras@gmail.com>\r
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+Date: Wed, 18 Apr 2012 19:03:44 +0300\r
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+\r
+On Wed, Apr 18 2012, Felipe Contreras <felipe.contreras@gmail.com> wrote:\r
+\r
+> On Wed, Apr 18, 2012 at 6:40 PM, Tomi Ollila <tomi.ollila@iki.fi> wrote:\r
+>> On Wed, Apr 18 2012, David Bremner <david@tethera.net> wrote:\r
+>>\r
+>>> Felipe Contreras <felipe.contreras@gmail.com> writes:\r
+>>>>> If this is not an issue, then LGTM.\r
+>>>>\r
+>>>> I don't know, I have always used $(PWD), unless anybody else prefers\r
+>>>> $(CURDIR), I'll push that.\r
+>>>\r
+>>> I think CURDIR is better; if only because it is the standard (GNU) make\r
+>>> way of doing things [1]. =C2=A0I'm not sure if there is a functional\r
+>>> difference or not. At least CURDIR definitely works with make -C [2]\r
+>>\r
+>> I read some web pages and then did an experiment; GNU make (v 3.77+)\r
+>> has builtin variable $(CURDIR). $(PWD) gets value from environment:\r
+>>\r
+>> doing the following:\r
+>>\r
+>> $ cat > foo.mk <<EOF\r
+>> all:\r
+>> =C2=A0 =C2=A0 =C2=A0 =C2=A0pwd=3D`pwd`; echo $pwd\r
+>> =C2=A0 =C2=A0 =C2=A0 =C2=A0echo $(CURDIR)\r
+>> =C2=A0 =C2=A0 =C2=A0 =C2=A0echo $(PWD)\r
+>> EOF\r
+>> $ PWD=3D make -f foo.mk\r
+>> pwd=3D`pwd`; echo $pwd\r
+>\r
+> Agh! Complete confusion. Add an '@' before echo =3D/\r
+\r
+Actually I wonder where one '$' was lose in line pwd=3D`pwd`; echo $$pwd\r
+\r
+>> So, most portable option would be using pwd=3D`pwd`; echo $pwd\r
+>> construct in the makefile. Next option would be using $(CURDIR)\r
+>> and it works with -C (and with original bourne shell which does\r
+>> not manage $PWD). That is GNU make (v 3.77+) spesific but the makefiles\r
+>> use GNU make constructs elsewhere too.\r
+>\r
+> I think `pwd` is overkill. I vote for $(CURDIR), although $$PWD\r
+> wouldn't be bad either.\r
+\r
+So, $(CURDIR) has 3 votes :D\r
+\r
+>\r
+> Cheers.\r
+>\r
+> --=20\r
+> Felipe Contreras\r
+\r
+Tomi\r