Re: libc++ vs. libstdc++ usage in the ports tree

On 12/03/2013 21:54, Tijl Coosemans wrote:
> On Tue, 03 Dec 2013 21:26:18 +0100 Jan Henrik Sylvester wrote:
>> On 12/01/2013 15:06, Tijl Coosemans wrote:
>>> On Wed, 27 Nov 2013 20:45:56 +0100 Tijl Coosemans wrote:
>>>> On Wed, 27 Nov 2013 19:31:44 +0100 Jan Henrik Sylvester wrote:
>>>>> Trying to migrate to 10, I would like to keep octave. Have you found
>>>>> anything new? Having build the port and all dependencies with standard
>>>>> options, octave is segfaulting for me, too. Anyhow, I can run octave with:
>>>>>
>>>>> env LD_PRELOAD=/usr/lib/libc++.so.1 octave
>>>>>
>>>>> Some very light testing indicates that it is working. Of course, this is
>>>>> not ideal.
>>>>>
>>>>> Maybe this gives a clue how to fix the octave port properly.
>>>>
>>>> I have a preliminary patch for math/octave that I wanted to test on
>>>> redports first, but it is down at the moment so here it is.
>>>
>>> The tests were successful:
>>> https://redports.org/buildarchive/20131201105316-94935/ (octave)
>>> https://redports.org/buildarchive/20131201115701-22333/ (octave-forge-base)
>>> The octave logs also contain the results of running the regression-test
>>> target.  The output is the same on all FreeBSD versions.
>>>
>>> The problem is that USE_FORTRAN=yes implies USE_GCC=yes.  This means
>>> the C++ code in math/octave is compiled with gcc46/libstdc++ which
>>> does not work if dependencies have been built with clang/libc++.
>>>
>>> The patch copies the USE_FORTRAN=yes logic from Mk/bsd.gcc.mk into a
>>> new file Mk/Uses/fortran.mk.  It allows ports to use a Fortran compiler
>>> together with the base system C/C++ compiler.
>>
>> With the patch, math/octave fails for me on 9.2-RELEASE/amd64 and
>> 10.0-BETA4/amd64 with:
>>
>> checking for amd64-portbld-freebsd(9.2|10.0)-gfortran... f77
>> checking whether we are using the GNU Fortran 77 compiler... no
>> checking whether f77 accepts -g... no
>> checking how to get verbose linking output from f77... configure:
>> WARNING: compilation failed
>>
>> checking for Fortran 77 libraries of f77...
>> checking for dummy main to link with Fortran 77 libraries... none
>> checking for Fortran 77 name-mangling scheme... configure: error: in
>> `/usr/ports/math/octave/work/octave-3.6.4':
>> configure: error: cannot compile a simple Fortran program
>>
>> Full logs attached (each with and without your patch).
>>
>> In both cases, it tries to use f77, while the original port uses gfortran46.
>>
>> Any idea what is wrong on my system?
> 
> Do you define FC in make.conf maybe?

No, besides some options (*_SET / *_UNSET) for some unrelated ports, I
only have got this in make.conf:

WITH_PKGNG=yes
WITH_NEW_XORG=yes
TEX_DEFAULT=texlive

Cheers,
Jan Henrik