[ncl-install] NCL 5.1.0 and libcurl

[Mary Haley]

Here's a better test to use to see if your version of NCL has OPeNDAP
capabilities:

   url      = "http://test.opendap.org/opendap/data/nc/"
   filename = url + "123.nc"

   exists = isfilepresent(filename)
   if(.not.exists) then
     print("OPeNDAP isfilepresent test unsuccessful.")
     print("Either file doesn't exist, or NCL does not have OPeNDAP capabilities on this system")
   else
     print("OPeNDAP isfilepresent test successful.")
     f = addfile(filename,"r")
     vars = getfilevarnames(f)
     print(vars)   ; should be (in any order): "l","j","i","cross","aloan",
                   ; "shot","order","bears"
   end if


I've updated the Applications page to reflect this new example.

--Mary


On Tue, 31 Mar 2009, Mateus Teixeira wrote:

> Hi David,
>
> Thanks for your suggestion, now NCL doesn't complains about any library, but
> I would like to know if the example given in
>
> http://www.ncl.ucar.edu/Applications/opendap.shtml
>
> really works? Is the internet address correct?
>
> NCL gives the following answer when I try to access the file shown in that
> example:
>
> ncl 0> url      = "http://www.cdc.noaa.gov/cgi-bin/nph-nc/Datasets/"
> ncl 1> filename = "ncep.reanalysis.dailyavgs/pressure/air.1948.nc"
> ncl 2> f = addfile(url + filename,"r")
> fatal:
> fatal:Could not open (
> http://www.cdc.noaa.gov/cgi-bin/nph-nc/Datasets/ncep.reanalysis.dailyavgs/pressure/air.1948.nc
> )
>
> In order to use NCL-opendap enabled, I have installed the following packages
> in my fedora 10 installation:
>
> openssl.i686                            0.9.8g-12.fc10
> openssl-devel.i386                   0.9.8g-12.fc10
>
> libcurl.i386                            7.19.4-3.fc10
> libcurl-devel.i386                   7.19.4-3.fc10
>
> libxml2.i386                            2.7.3-1.fc10
> libxml2-devel.i386                  2.7.3-1.fc10
>
> libdap.i386                             3.8.2-1.fc10
> libdap-devel.i386                    3.8.2-1.fc10
>
> libnc-dap.i386                          3.7.3-1.fc10
> libnc-dap-devel.i386                 3.7.3-1.fc10
>
> zlib.i386                               1.2.3-18.fc9
> zlib-devel.i386                      1.2.3-18.fc9
>
>
> It seems that all versions of the packages needed for NCL-opendap enabled to
> work are installed. I only not sure if the libcurl package installed was
> build with zlib.
>
> If the file location of that example is correct, I think that something
> isn't working properly in my system. If it is the case, is it possible to
> identify the source of the problem?
>
> Thanks for the help.
>
> Best regards,
>
>
> Mateus
>
>
>
> 2009/3/30 David Brown <dbrown at ucar.edu>
>
>> Hi Mateus,
>> I have seen a report that suggests a pretty simple work-around:
>>
>> If you have root access the most straightforward thing to do is to create
>> the following symbolic link:
>> ln -s /usr/lib/libcurl.so /usr/lib/libcurl.so.3
>>
>> This is assuming that your existing libcurl is in /usr/lib/.
>>
>> /usr/lib/libcurl.so is usually itself a symbolic link to the current
>> version of libcurl.
>>
>> If you don't have root access or you don't want to modify the system
>> library directories at all, then another option would be to
>> create the symbolic link in your own directory space, e.g.
>>
>> ln -s /usr/lib/libcurl.so <my-directory-path>/libcurl.so.3
>>
>> you would then need to add <my-directory-path>  to LD_LIBRARY_PATH:
>>
>> (using csh): setenv LD_LIBRARY_PATH <my-directory-path>:$LD_LIBRARY_PATH
>>
>> If this does not work, let us know. The other alternative is to actually
>> install a copy of libcurl.so.3, but it has other dependencies that
>> make it a somewhat painful process.
>>  -dave
>>
>>
>>
>> On Mar 29, 2009, at 11:31 AM, Mateus Teixeira wrote:
>>
>> Dear NCL users,
>>
>> I'm trying to run NCL 5.1.0 OPeNDAP-enabled binaries on Fedora 10, but it
>> complains about libcurl.so.3 file. I checked my system and found that there
>> is a version of libcurl package that provides the file libcurl.so.4. I
>> didn't find a package providing the requered file.
>>
>> Is there a solution or a workaround to this problem?
>>
>> Best regards,
>>
>>
>> --
>> Mateus da Silva Teixeira
>>
>> Registered Linux User #466740
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>>
>>
>>
>
>
> -- 
> Mateus da Silva Teixeira
>
> Registered Linux User #466740
>