#885: WinGrass: displaying r.external-linked raster data not working
------------------------------+---------------------------------------------
Reporter: hellik | Owner: grass-dev@lists.osgeo.org
Type: defect | Status: new
Priority: critical | Milestone: 6.4.0
Component: Display | Version: svn-releasebranch64
Resolution: | Keywords: r.external, WinGrass
Platform: MSWindows Vista | Cpu: x86-32
------------------------------+---------------------------------------------
Comment (by hellik):
Replying to [comment:1 glynn]:
> Replying to [ticket:885 hellik]:
> > fresh Grass64svn, self compiled,
> > nc-sample-dataset
> >
> > elevation exported as gtiff
> >
> > linking by r.external seems to work
>
> > basic information raster of the linked data is available
>
> > but if i want to display the linked raster in the wxgui, following
error message comes up:
> >
> {{{
> "Error: Unable to locate symbol <GDALAllRegister>
> }}}
>
> I suspect that it needs to be e.g. `gdalallregis...@0`, as the functions
use the "stdcall" (aka "pascal") calling convention.
>
> It works with the version of GDAL I have here (which I built from
source), which for some reason seems to be using "ccall" (the symbols
don't have the @<size> suffix).
I'm using at the moment the precompiled gdal-16 provided by the osgeo4w-
stack and no self compiled gdal.
>
> You could try using "`make GDAL_DYNAMIC=`" to link libgis directly
against GDAL, rather than using `LoadLibrary()`.
I'm using at moment the predefined options in package.sh
(\grass64svn\mswindows\osgeo4w)
{{{
./configure \
--with-libs="$OSGEO4W_ROOT_MSYS/apps/gdal-16/lib
$OSGEO4W_ROOT_MSYS/lib" \
--with-includes="$OSGEO4W_ROOT_MSYS/apps/gdal-16/include
$OSGEO4W_ROOT_MSYS/include" \
--exec-prefix=$OSGEO4W_ROOT_MSYS/bin \
--libexecdir=$OSGEO4W_ROOT_MSYS/bin \
--prefix=$OSGEO4W_ROOT_MSYS/apps/grass \
--includedir=$OSGEO4W_ROOT_MSYS/include \
--disable-x --without-x \
--with-cxx \
--enable-shared \
--enable-largefile \
--with-opengl=windows \
--with-fftw \
--with-freetype \
--with-proj-share=$OSGEO4W_ROOT_MSYS/share/proj \
--with-gdal=$OSGEO4W_ROOT_MSYS/bin/gdal-config \
--with-tcltk \
--with-sqlite \
--with-postgres \
--with-curses \
--with-regex \
--with-nls \
--without-swig \
--with-freetype-
includes=$OSGEO4W_ROOT_MSYS/include/freetype2 \
--with-odbc
[...]
echo $(date): STARTING make
make || make
[...]
}}}
what would be the exact "GDAL_DYNAMIC" options so I could try this way?
>
> To make it work with a stdcall version of GDAL, I need to know the
decorated names.
because I'm compiled gdal provided by osgeo4w, I'm not able to get the
decorated names, right?
>
> OTOH, it may be better to simply omit the r.external support from 6.5;
it's very out of date (it was back-ported shortly after the first draft of
the code was added to 7.0, and hasn't been updated since).
I think, r.external is very useful.
Helmut
--
Ticket URL: <http://trac.osgeo.org/grass/ticket/885#comment:2>
GRASS GIS <http://grass.osgeo.org>
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