[gdal-dev] Re: GDAL 1.5.0 Perl Binding on Cygwin

Paul Mallas pmallas at rsmas.miami.edu
Tue Jan 29 09:17:41 EST 2008

I finally got the GDAL Perl bindings to compile on Cygwin. 

In addition to the c++ library issue that Jim mentioned, I used the 
--without-libtool option in the configure script when building the gdal 

Jingmu Yang wrote:
> I experienced the same problem when I initially built GDAL 1.5.0 on 
> Cygwin.  After analyzing the libraries I found that I had old GDAL 
> libraries installed on /usr/local/lib/.  What I did was to delete 
> those old libraries from /usr/local/lib and then built GDAL 1.5.0 
> without Perl binding.  After GDAL 1.5.0 was installed on /usr/local/ I 
> built Perl binding as I described and I no longer have the link problems.
> Hope this can help.
> Jim
> Paul Mallas wrote:
>> I fixed this problem by editing a Cygwin script /usr/bin/perlld from:
>> my $CC = 'gcc';
>> to:
>> my $CC = 'g++';
>> This seems to fix other perl problems (non-GDAL) with Cygwin as well. 
>> When I pointed this out, the Cygwin folks thought it was a bug but 
>> wanted to investigate why this was set to gcc in the first place.
>> Anyway, my problem remains with perl swig bindings on Cygwin. I know 
>> Ari wants nothing more to do with this issue, but since we're on the 
>> subject, maybe someone else might able to give me a clue.
>> It seems I have a problem linking with the gdal lib with external 
>> libs.  I get a ton of these types of messages below - I think the 
>> issue has to do with the beginning underscore in the calls because 
>> rikdataset.cpp calls "uncompress" not "_uncompress":
>> /usr/local/lib/libgdal.a(rikdataset.o):rikdataset.cpp:(.text+0x519): 
>> undefined reference to `_uncompress'
>> /usr/local/lib/libgdal.a(jpeg2000dataset.o): In function 
>> `_ZN18JPEG2000RasterBandC2EP15JPEG2000Datasetiii':
>> /home/pmallas/gdal/frmts/jpeg2000/jpeg2000dataset.cpp:257: undefined 
>> reference to `_jas_matrix_create'
>> ....
>> I am ignorant of how libraries get called - probably the windows 
>> demands a prepended underscore for library calls or something. And I 
>> know there are flags to manipulate leading underscores with g++ (like 
>> -fleading-underscore), but I could never get them to work. I have 
>> spent considerable time trying to sort this out with no luck.
>> Any insights would be appreciated.
>> jingmuyang at aol.com wrote:
>>> I have successfully built GDAL 1.5.0 Perl binding on Cygwin and the 
>>> followings might be helpful for those who experience problems.
>>> 1. Go to directory gdal-1.5.0/swig/perl and run 'perl Makefile.PL'.  
>>> The following four Makefiles should be created if it succeeds:
>>> Makefile_Geo__GDAL
>>> Makefile_Geo__GDAL__Const
>>> Makefile_Geo__OGR
>>> Makefile_Geo__OSR
>>> 2. Edit each of the four Makefiles by appending -lstdc++ after each 
>>> -lgdal and save them.
>>> 3. Run make using each of the four Makefiles as follows:
>>> make -f Makefile_Geo__GDAL
>>> make -f Makefile_Geo__GDAL__Const
>>> make -f Makefile_Geo__OGR
>>> make -f Makefile_Geo__OSR
>>> 4. Install the Perl Geo::GDAL package by running
>>> make -f Makefile_Geo__GDAL install
>>> That it.  Enjoy!
>>> Jim
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