library not found for -lgfortran

[Mark Brethen]

Sent from my iPhone

> On Jul 8, 2014, at 10:47 AM, Sean Farley <sean at macports.org> wrote:
> 
> 
> Ryan Schmidt writes:
> 
>>> On Jul 8, 2014, at 7:34 AM, Mark Brethen wrote:
>>> 
>>>> On Jul 8, 2014, at 3:05 AM, Ryan Schmidt wrote:
>>>> 
>>>>> On Jul 7, 2014, at 11:28 PM, Mark Brethen wrote:
>>>>> 
>>>>> I was told that until a patch is submitted, I can just add -L/opt/local/lib/gcc48 to the LDFLAGS environment variable. So I put this in the portfile:
>>>>> 
>>>>> configure.ldflags-append "-L${prefix}/lib/gcc48"
>>>>> 
>>>>> I'm thinking that "gcc48" should be replaced by a variable, but what do I use?
>>>> 
>>>> MacPorts doesn't provide a variable suitable for that. If you have gcc variants, you could append to configure.ldflags in each variant, adjusting the path as needed for each gcc version.
>>> 
>>> I have:
>>> 
>>> compilers.choose        fc
>>> compilers.setup         -dragonegg -g95 require_fortran
>>> 
>>> if {![fortran_variant_isset]} {
>>>   default_variants-append +gcc48
>>> }
>>> 
>>> configure.ldflags-append "-L${prefix}/lib/gcc48 -lgfortran"
> 
> This kind of information can only be reliably found out at configure
> time. In other words, why isn't the FreeCAD project figuring this out
> based on the fortran compiler with a configure test?
> 
They are aware that this needs to be patched. In the meantime they suggested setting it.

>>> If the user has set a different version of gcc this won't work.
>> 
>> Oh, you don't create the compiler variants manually; you have the compilers portgroup do it for you. I'm not sure how the author of that portgroup intended for this situation to be handled. Maybe it does provide a variable for the currently–selected variant. Sean?
> 
> This situation smells awfully like something else is going on here. This
> might mean that the linker should be FC instead of CC or CXX but that's
> just a thought.

I don't know. For now, maybe I should restrict it to gcc48 like so

compilers.setup -dragonegg -g95 -gcc +gcc48 require_fortran