[R-SIG-Mac] ./configure cannot use Fortran

[Simon Urbanek]

On Jun 29, 2011, at 11:29 PM, robin hankin wrote:

> Hi
> 
> macosx 10.6.7, brand new machine.
> 
> Trying to compile R 2.13.0 from sources.
> 
> As per the mac faq, I have installed Xcode 3.2.6 and gfortran 4.2.3, downloaded
> directly from the link on the macOSX-FAQ page.
> 
> The $PATH seems to check out:
> 
> $ echo $PATH
> /usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin
> 
> and indeed gfortran is visible:
> 
> $ gfortran --version
> GNU Fortran (GCC) 4.2.3
> Copyright (C) 2007 Free Software Foundation, Inc.
> 
> 
> but ./configure fails with:
> 
> checking how to get verbose linking output from gcc -std=gnu99... -v
> checking for C libraries of gcc -std=gnu99...  -lcrt1.10.6.o
> -L/usr/local/lib -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/x86_64
> -L/usr/lib/i686-apple-darwin10/4.2.1
> -L/usr/lib/gcc/i686-apple-darwin10/4.2.1
> -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../../i686-apple-darwin10/4.2.1
> -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/../../.. -lSystem
> checking for dummy main to link with Fortran 77 libraries... none
> checking for Fortran 77 name-mangling scheme... unknown
> configure: WARNING: unknown Fortran name-mangling scheme
> checking whether gfortran appends underscores to external names... unknown
> configure: error: cannot use Fortran
> 
> 
> 
> Can anyone advise?
> 

You're using the older Leopard Fortran which in itself is not bad, but that means you have to specify the architecture since the default for the old Fortran is 32-bit whereas the default for your remaining compilers is 64-bit. See Mac FAQ 2.1 (Quickstart) for copy/paste instructions. Alternatively you can install the Fortran for Xcode (which further down on the tools page -- direct link: http://R.research.att.com/gfortran-42-5664.pkg ) which is for Snow Leopard (10.6) and thus defaults to 64-bit.

Cheers,
Simon