[gdal-dev] gdal on cygwin

[Even Rouault]

Le lundi 25 avril 2016 12:46:36, Marco Atzeri a écrit :
> Dear developers,
> 
> building and testing latest 2.1.0 RCx on cygwin
> enabling perl and python I hit some very curious build
> issues:
> 
> 1)
> The configure requires that CXX is not defined for
> building the python swig system
> It seems a old issue not cygwin specific:
> http://www.michael-joost.de/gdal_install.html

The link doesn't work for me.

> 
> It is an annoy issue impacting I suspect most of the
> distribution build systems that usually predefine
> variables like CXX. I lost several hours to
> overcome the puzzling behavior of the build.

What's the solution ? Any upstreamable patch ? Looking quickly we don't seem 
to do anything particular regarding the compiler for Python extension building 
and rely on distutils.command.build_ext

> 
> 2)
> I tried to overcome #1 using in autogen.sh
> libtoolize --force --copy
> aclocal --force -I ./m4
> but it results in a cripple libtool, totally unusable.
> 
> Any hope for a full working autoreconf ?

I'm not sure how much effort woul be involved. GDAL autoconf stuff is rather ad-
hoc.

> 
> 3)
> On ogr/ogrct.cpp there is a strange assumption that
> shared lib will never be bumped
> 
> #elif defined(__CYGWIN__)
> #  define LIBNAME      "cygproj-0.dll"
> 
> unfortunately current one is  /usr/bin/cygproj-9.dll
> and previous was already /usr/bin/cygproj-1.dll.
> Should be better to link with "-lproj" instead of assuming to
> know the library name ?

You can ./configure --with-static-proj4 (which, as not obvious in the name, 
also work with proj shared objects :-) "static" here means linking at build 
time, vs the default way which is at runtime) for more classic linking

> 
> I will need to rebuild the just released binary
> https://www.cygwin.com/ml/cygwin-announce/2016-04/msg00062.html
> to correct the same mistake.
> 
> Regards
> Marco
> 
> 
> 
> 
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev

-- 
Spatialys - Geospatial professional services
http://www.spatialys.com