[ncl-install] NCARG list example error - mpex15

[David Brown]

Hi Salme,
This particular example uses a feature of the low level mapping library
that is not supported at the NCL level, so unless you are writing Fortran
or C code that interfaces directly to the low level mapping routines, it is
not important to get this example working.
Instead, if you are primarily using NCL, you should try the 'ng4ex'
examples, specifically the NCL versions of these examples, which all have
the suffix 'n'  (e.g. cn01n).

That said, the undefined references you get above do seem to be the result
of a bug in the build environment for the low level mapping code. I cannot
run the example either and I get the same errors you do. We will fix it as
soon as we can.
 -dave




On Tue, Jul 15, 2014 at 11:13 AM, Salme Cook <sc10 at wildcats.unh.edu> wrote:

>   Good Afternoon!
>
> I have installed and tested NCL binaries following the instructions on the NCL website. I am on an Ubuntu machine and the binary version I downloaded: *ncl_ncarg-6.2.0.Linux_Debian6.0_x86_64_gcc445.tar.gz *
>
> The NCL/NCARG tests are clean
> ng4ex gsun01n -clean
> ^ worked great
> and
> ncargex cpex08 -clean
> ^ worked great.
> However, when I go to list the examples available
> ncargex -A -list I have an error when I hit the mpex15 example:
>
>  NCAR Graphics Fortran  Example <mpex15>
>
>   Copying mpex15.f
>
>   Copying Europe.png
>
>   Copying Europe.pngi
>
> Compiling and linking...
> gfortran -fPIC -fno-second-underscore -fno-range-check -fopenmp -O -lpng
> -lz -o mpex15 mpex15.f -L/home/field/ncl-6.2.0/lib -lncarg -lncarg_gks
> -lncarg_c -lX11 -lXext -lcairo -lfontconfig -lpixman-1 -lfreetype -lexpat
> -lpng -lz -lpthread -lbz2 -lXrender
> /tmp/cc8xr5xs.o: In function `main':
> mpex15.f:(.text+0x1f1): undefined reference to `mapngr_'
> mpex15.f:(.text+0x324): undefined reference to `mapngd_'
> mpex15.f:(.text+0x4d8): undefined reference to `mapngq_'
> collect2: error: ld returned 1 exit status
>
> The compile and link failed.
>
>  I have been looking online and on the NCL FAQs and Install threads but
> haven't been able to understand what is going wrong.
>
>  Thank you for your time!
>
>  - Salme
>
>  PhD student, Oceanography
>  College of Engineering and Physical Science
>  University of New Hampshire
>
>
>
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