[Numpy-discussion] FORTRAN compiler detection

[Travis E. Oliphant]

Christopher Hanley wrote:
> Robert Kern wrote:
>   
>> On Tue, Feb 26, 2008 at 12:09 PM, Christopher Hanley <chanley at stsci.edu> wrote:
>>     
>>> Robert Kern wrote:
>>>  > On Tue, Feb 26, 2008 at 11:50 AM, Christopher Hanley <chanley at stsci.edu> wrote:
>>>  >> Greetings,
>>>  >>
>>>  >>  I was wondering if within the last 8 - 10 weeks anyone has made changes
>>>  >>  to the way FORTRAN compilers are detected.  In the past I was able to
>>>  >>  specify which compiler was used by the F77 system variable.  However, I
>>>  >>  am now having a f90 compiler that exists on my Solaris system detected
>>>  >>  regardless of the F77 value.  Even unsetting the F77 variable leads to
>>>  >>  the use of the f90 compiler.
>>>  >>
>>>  >>  I was going to look though the distutil change logs but I was hoping
>>>  >>  that someone might remember changing something off the top of their heads.
>>>  >
>>>  > Which FORTRAN compilers do you have installed? What --fcompiler flag
>>>  > are you using?
>>>  >
>>>  Hi Robert,
>>>
>>>  Thank you for your help.
>>>
>>>  I am not using the --fcompiler flag.
>>>       
>> Okay, use the --fcompiler flag. That is the way to tell numpy to use a
>> particular compiler if you have multiple ones installed.
>>
>>     
>
> What do you do if you have FORTRAN compilers installed but don't want to 
> use any of the compilers to build numpy?
>   
You need to use it in your case because you are linking against lapack 
and blas that were built with a Fortran compiler.  The Fortran compiler 
is only used in the link step of lapack_lite.so

-Travis O.