new port - different versions of the same file - advice needed

[Anton Shterenlikht]

On Fri, Nov 05, 2010 at 09:53:47PM +0800, Sunpoet Hsieh wrote:
> On Fri, Nov 5, 2010 at 6:26 PM, Anton Shterenlikht <mexas at bristol.ac.uk> wrote:
> > I'm trying to make a port of Slatec numerical libraries:
> > http://netlib.org/slatec/
> >
> > This file contains the full sources:
> > http://netlib.org/slatec/slatec_src.tgz
> >
> > However, according to Netlib FAQ: http://netlib.org/misc/faq.html#2.17 ,
> > I've got to replace 3 files in this archive by newer versions:
> >
> > *quote*
> > The easiest to use versions of the routines r1mach, d1mach, and i1mach
> > are located in the blas directory of Netlib. These versions of r1mach
> > and d1mach attempt to determine machine characteristics automatically.
> >
> > The original versions of r1mach, d1mach, and i1mach,
> > in the slatec/src directory, require a user to scan
> > their source and to uncomment the statements specifying
> > the constants for his particular machine. Constants for some
> > architectures are not explicitly identified in the comments
> > of r1mach, d1mach, and i1mach. For those architectures conforming
> > to the IEEE floating-point standard, and most newer ones do,
> > you can locate and uncomment the IEEE-conforming constants in the routines.
> > *end quote*
> >
> > So I need to download http://netlib.org/slatec/slatec_src.tgz,
> > extract all files from it, and then overwrite d1mach.f, i1mach.f
> > and r1mach.f by the Blas versions:
> >
> > http://netlib.org/blas/d1mach.f
> > http://netlib.org/blas/i1mach.f
> > http://netlib.org/blas/r1mach.f
> >
> > What is the best way to achive this?
> >
> > many thanks
> > anton
> >
> 
> Hi,
> 
> FYI, let me simplify your requirements:
> 1. source tarball and patch files are from different URLs.
> 2. patch files are not archived.
> 
> My suggestion is as follows: (I've not tested yet.)
> 
> PORTNAME=	slatec
> MASTER_SITES=	http://netlib.org/slatec/ \
> 		http://netlib.org/blas/:mach
> DISTFILES=	${PORTNAME}_src.tgz \
> 		d1mach.f:mach i1mach.f:mach r1mach.f:mach
> EXTRACT_ONLY=	${PORTNAME}_src.tgz
> 
> Then you could copy these three files from DISTDIR to the work directory.
> 
> post-extract:
> 	@cd ${DISTDIR}/ && ${CP} d1mach.f i1mach.f r1mach.f ${WRKSRC}/src/
> 
> Hope that helps.
> 
> Regards,
> sunpoet

thanks, this works well.

-- 
Anton Shterenlikht
Room 2.6, Queen's Building
Mech Eng Dept
Bristol University
University Walk, Bristol BS8 1TR, UK
Tel: +44 (0)117 331 5944
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