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Subject: Re: [OMPI users] install intel mac with Laopard
From: Doug Reeder (dlr_at_[hidden])
Date: 2008-04-24 11:57:01


For the specific problem of the gcc compiler creating i386 objects
and ifort creating x86_64 objects, in the config.log file it says

configure:26935: ifort -o conftest conftest.f conftest_c.o >&% ld:
warning in conftest_c.o, file is not of required architecture

If configure could pick up on this and write an error message
something like "Your C and fortran compilers are creating objects for
different architectures. You probably need to change your CFLAG or
FFLAG arguments to ensure that they are consistent" it would point
the user more directly to the real problem. Right now the information
is in the config.log file but it doesn't jump out at you.

Doug Reeder
On Apr 24, 2008, at 8:40 AM, Jeff Squyres wrote:

> On Apr 24, 2008, at 11:07 AM, Doug Reeder wrote:
>> Make sure that your compilers are all creaqting code for the same
>> architecture (i386 or x86-64). ifort usually installs such that the
>> 64 bit version of the compiler is the dfault while the apple gcc
>> compiler creates i386 output by default. Check the architecture of
>> the .o files with file *.o and if the gcc output needs to be x86_64
>> add the -m64 flag to the c and c++ flags. That has worked for me.
>> You shouldn't need the intel c/c++ compilers. I find the configure
>> error message to be a little bit cryptic and not very insightful.
> Do you have a suggestion for a new configure error message? I thought
> it was very clear, but then again, I'm one of the implementors...
>>> checking if C and Fortran 77 are link compatible... no
>>> ********************************************************************
>>> **
>>> * It appears that your Fortran 77 compiler is unable to link against
>>> * object files created by your C compiler. This generally indicates
>>> * either a conflict between the options specified in CFLAGS and
>>> * or a problem with the local compiler installation. More
>>> * information (including exactly what command was given to the
>>> * compilers and what error resulted when the commands were
>>> executed) is
>>> * available in the config.log file in this directory.
>>> ********************************************************************
>>> **
>>> configure: error: C and Fortran 77 compilers are not link
>>> compatible.
>>> Can not continue.
> --
> Jeff Squyres
> Cisco Systems
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