Re: [gentoo-user] Do we have to build gcc with fortran now?

[justin]

On 22/06/11 07:25, justin wrote:
> On 22/06/11 06:31, Matthew Finkel wrote:
>> On 06/21/11 23:55, Dale wrote:
>>> I just did my updates and ran into this:
>>>
>>> * Maintainer: sci@g.o
>>>  * USE:        amd64 consolekit elibc_glibc kernel_linux multilib
>>> policykit userland_GNU
>>>  * FEATURES:   preserve-libs sandbox
>>>
>>>  * Please install currently selected gcc version with USE=fortran.
>>>  * If you intend to use a different compiler then gfortran, please
>>>  * set FC variable accordingly and take care that the neccessary
>>>  * fortran dialects are support.
>>>
>>>  * ERROR: sci-libs/blas-reference-20070226 failed (setup phase):
>>>  *   Currently no working fortran compiler is available
>>>  *
>>>  * Call stack:
>>>  *          ebuild.sh, line   56:  Called pkg_setup
>>>  *          ebuild.sh, line 1446:  Called fortran-2_pkg_setup
>>>  *   fortran-2.eclass, line  134:  Called _die_msg
>>>  *   fortran-2.eclass, line  120:  Called die
>>>  * The specific snippet of code:
>>>  *      die "Currently no working fortran compiler is available"
>>>  *
>>>  * If you need support, post the output of 'emerge --info
>>> =sci-libs/blas-reference-20070226',
>>>  * the complete build log and the output of 'emerge -pqv
>>> =sci-libs/blas-reference-20070226'.
>>>  * The complete build log is located at
>>> '/var/log/portage/sci-libs:blas-reference-20070226:20110622-034357.log'.
>>>  * The ebuild environment file is located at
>>> '/var/tmp/portage/sci-libs/blas-reference-20070226/temp/die.env'.
>>>  * S:
>>> '/var/tmp/portage/sci-libs/blas-reference-20070226/work/lapack-lite-3.1.1'
>>>
>>>>>> Failed to emerge sci-libs/blas-reference-20070226, Log file:
>>>
>>>>>>
>>> '/var/log/portage/sci-libs:blas-reference-20070226:20110622-034357.log'
>>> root@fireball / #
>>>
>>> This is my gcc info:
>>>
>>> [ebuild   R    ] sys-devel/gcc-4.4.5  USE="gtk mudflap (multilib) nls
>>> nptl openmp (-altivec) -bootstrap -build -doc (-fixed-point) -fortran
>>> -gcj -graphite (-hardened) (-libffi) -multislot -nocxx -nopie -nossp
>>> -objc -objc++ -objc-gc -test -vanilla"
>>>
>>> So, does everyone need to turn on the fortran USE flag so that they
>>> don't break anything?   May I also add, the USE flag description is
>>> worth about as much as a screen door on a submarine.
>>>
>>> fortran - Adds support for fortran (formerly f77)
>>>
>>> That doesn't tell me very much.
>>>
>>> Heads up for folks about to do their updates, check into the USE flag
>>> fortran to see if you need to add it to yours before updating a bunch
>>> of stuff.
>>>
>>> Dale
>>>
>>> :-)  :-)
>>>
>> If I had to guess, I'd say =sci-libs/blas-reference-20070226 requires
>> fortran (ebuild depends on it) and you don't have another fortran
>> compiler installed.
>>
>> Could be wrong though.
>>
>> - Matt
>>
>
> That's right,
>
> blas-reference is written in fortran.
>
> We restructured the dependency chain for fortran support, which includes
> a compile test now. The failure can be seen above.
>
> The Problem was in short, USE=fortran was enabled by default for linux
> arches, but people tend to disable it. Depending on gcc[fortran] doesn't
> work completely as gcc:4.4[fortran] and gcc:4.5[-fortran] with gcc-4.5
> select can be installed, which would full fill the dependency but
> nevertheless doesn't give a working compiler.
>
> So now packages depend on virtual/fortran and use an eclass to check for
> a working compiler. So if you see this message, this means you somehow
> worked around gcc[fortran].
>
>
> justin
>

One little note,

if portage requests that you should install dev-lang/ifc instead of
gcc[fortran], you most probably have an entry

sys-devel/gcc -fortran

in

your /etc/portage/package.use

Just remove that.

justin