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Subject: Re: .for woes
From: Maxim Sobolev <sobomax@FreeBSD.org>
To: Ernst de Haan <znerd@FreeBSD.org>
Cc: ports@FreeBSD.org
In-Reply-To: <02031123024601.00964@heinz>
References: <02031123024601.00964@heinz>
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Date: 12 Mar 2002 00:55:25 +0200
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On Tue, 2002-03-12 at 00:02, Ernst de Haan wrote:
> Hi,
>=20
> I'm noticing some weird behaviour. This is my test Makefile:
>=20
>    PORTNAME=3D       testport
>    PORTVERSION=3D    1
>    FILES:=3D ${FILESDIR}/a \
>                    ${FILESDIR}/b
>    CATEGORIES=3D     #
> =20
>    DISTFILES=3D      #
>    EXTRACT_ONLY=3D   #
> =20
>    do-build:
>            @${ECHO_CMD} "Files: ${FILES}"
>    .for f in ${FILES}
>            @${ECHO_CMD}  "File $f..."
>    .endfor
> =20
>    .include <bsd.port.mk>
>=20
> Surprisingly, the result of running 'make' is:
>=20
>    =3D=3D=3D>  Extracting for testport-1
>    =3D=3D=3D>  Patching for testport-1
>    =3D=3D=3D>  Configuring for testport-1
>    =3D=3D=3D>  Building for testport-1
>    Files: /usr/home/ernst/testport/files/a  /usr/home/ernst/testport/file=
s/b
>    File /a...
>    File /b...
>=20
> How do I get the full file names within the .for ?

That because expansion of the variable ${FOO} in the `.for bar in
${FOO}' statement is performed immediately at the time of parsing, while
expansion of all other variables is deferred until they are actually
used in target. Since in your case ${FILESDIR} isn't defined when
make(1) parses .for statement it expands to "". To make your snippet
working you can use one of the following two ways:

1. Include <bsd.port.pre.mk> before .for statement and use `=3D' instead
of `:=3D' to assign value to ${FILES};

2. Rewrite the code to be:

FILES=3D foo bar
[...]
do-build:
[...]
.for f in ${FILES}
	@${ECHO_CMD}  "File ${FILESDIR}/$f..."
.endfor

-Maxim


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