[ncl-install] Error compiling Ictranc

[Mary Haley]

Craig,

Even though ifcore is a Fortran library, you still need it
in order to resolve the symbols for ictrans. This kind of thing
can happen when you have C programs calling Fortran routines, and
vice versa, which is the case for ictrans and just about everything
else in NCAR Graphics and NCL source code.

You should still be able to link against ifcore, even though it's a
Fortran library. As Rick pointed out, you need to tell the C compiler
where this library can be found by using the "-L" option.

Usually, though, if you are using ifort and icc, I'm surprised that
"icc" doesn't automatically know where to find this library, unless
icc and ifort were installed separately of each other, and are unaware
of each other's existence, so to speak.

--Mary


On Wed, 16 Apr 2008, Craig Tierney wrote:

> Rick Grubin wrote:
>> Hi Tristan
>> 
>>> I 'm trying to compile NCL 5.0 with Intel Fortan & C compiler.  Idt 
>>> doesn't display anything (just say "translator aborted"). Seem that's
>>> something wrong about 'ictrans'.
>>> 
>>> Indeed ictrans's compilation crash with "(.text+0x6eb5): undefined 
>>> reference to `for_cpystr`"
>> 
>> 'for_cpystr' is a symbol from the Intel Fortran compiler's library 
>> 'libifcore'
>> 
>>> Intel(R) C Compiler for applications running on IA-32, Version 10.1
>>> Build 20070913 Package ID: l_cc_p_10.1.008
>>> Intel(R) Fortran Compiler for applications running on IA-32, Version
>>> 10.1    Build 20070913 Package ID: l_fc_p_10.1.008
>>> [...]
>>> 
>>> icc -mp -ansi  -O    -o ictrans main.o
>>> [...] -L/opt/1/intel_cc_10.1/ia32/lib -lcxa -lifcore -lcprts -lm
>>> 
>>> ../../../.././ncarview/src/lib/libictrans/libictrans.o: In function
>>> `giargs_':
>>> (.text+0x6eb5): undefined reference to `for_cpystr'
>>> [...]
>>> CTOFLIBS    = -L/opt/1/intel_cc_10.1/ia32/lib -lcxa -lifcore -lcprts -lm
>> 
>> It would appear that you've done this, based on the output from the 
>> compilation and your Makefile.  Could you
>> please send along your 'LINUX' config file, located in: 
>> /path/to/ncl_source_code/ncarg/config/LINUX ?
>> 
>> Also, as was pointed out to me by a user, strictly speaking, the references 
>> to libraries 'cxa' and 'cprts' are not
>> necessary, but shouldn't hurt either.
>> 
>> One other thing to verify, as we cannot duplicate your host here, is that 
>> there is indeed a 'libifcore.a' located
>> in  /opt1/intel_cc_10.1/ia32/lib  --  that directory seems, by its name, to 
>> refer to the Intel C compiler library, and
>> 'libifcore.a' is an Intel Fortran compiler library.  Is there a directory 
>> similarly named that refers to the Fortran compiler
>> present in /opt1 ?
>> 
>
> I am having this same problem.  I was talking offline with Mary about
> this.  The library libifcore.a is a fortran library, not a C library.  In
> Intel compiler versions 8 through 10 (didn't check back further), it is
> not included in the C compiler.  One solution to this problem is to
> replace the linker icc with "ifort -nofor-main".
>
>
> Craig
>
>
>
>
>> ----   Rick Grubin      NCAR/TDD/CISL/VETS
>> Visualization + Enabling Technologies
>> grubin at ucar.edu             303.497.1832
>> 
>> 
>> _______________________________________________
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>> ncl-install at ucar.edu
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>
>
> -- 
> Craig Tierney (craig.tierney at noaa.gov)
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