[Qgis-user] building qgis 2.8.1 against grass 7

[Donovan Cameron]

Morning,

I'm attempting to compile the QGIS 2.8.1 grass plugin against GRASS 
7.0.0 on Arch Linux 64bit.

I read somewhere (maybe GIS.se?) that the GRASS plugin in QGIS doesn't 
have full functionality and a kickstarter/crowdfunding process could be 
underway to get it up to par, but in the meantime it was also mentioned 
it's still possible to use the toolbar to load grass 7 layers into the 
qgis canvas.

GDAL 1.11.2 is installed and so is gdal-grass plugin using some patches 
to get GDAL working with grass 7.

I'm using the following cmake options in the QGIS build:
-DWITH_GRASS=ON
-DGRASS_PREFIX=/opt/grass
-DGRASS_INCLUDE_DIR=/opt/grass/include



But QGIS fails to build with the following error:

Scanning dependencies of target qgisgrass
[ 50%] Building CXX object 
src/providers/grass/CMakeFiles/qgisgrass.dir/qgsgrass.cpp.o
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp: In static 
member function ‘static void QgsGrass::setMapset(QString, QString, 
QString)’:
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp:383:51: 
error: ‘G__setenv’ was not declared in this scope
    G__setenv( "GISDBASE", gisdbase.toUtf8().data() );
                                                    ^
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp:392:30: 
error: ‘G_available_mapsets’ was not declared in this scope
      ms = G_available_mapsets();
                               ^
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp: In static 
member function ‘static QString QgsGrass::openMapset(QString, QString, 
QString)’:
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp:611:46: 
error: ‘G__setenv’ was not declared in this scope
    G__setenv( "GISRC", mGisrc.toUtf8().data() );
                                               ^
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp: In static 
member function ‘static QString QgsGrass::closeMapset()’:
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp:657:39: 
error: ‘G__setenv’ was not declared in this scope
      G__setenv( "GISRC", ( char * ) "" );
                                        ^
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp: In static 
member function ‘static bool QgsGrass::region(QString, QString, QString, 
Cell_head*)’:
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp:1082:83: 
error: ‘G__get_window’ was not declared in this scope
    G__get_window( window, ( char * ) "", ( char * ) "WIND", 
mapset.toUtf8().data() );
^
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp: In static 
member function ‘static bool QgsGrass::mapRegion(int, QString, QString, 
QString, QString, Cell_head*)’:
/tmp/makepkg/qgis/src/qgis/src/providers/grass/qgsgrass.cpp:1268:94: 
error: ‘G__get_window’ was not declared in this scope
      G__get_window( window, ( char * ) "windows", map.toUtf8().data(), 
mapset.toUtf8().data() );
^
src/providers/grass/CMakeFiles/qgisgrass.dir/build.make:60: recipe for 
target 'src/providers/grass/CMakeFiles/qgisgrass.dir/qgsgrass.cpp.o' failed
make[2]: *** 
[src/providers/grass/CMakeFiles/qgisgrass.dir/qgsgrass.cpp.o] Error 1
CMakeFiles/Makefile2:1251: recipe for target 
'src/providers/grass/CMakeFiles/qgisgrass.dir/all' failed
make[1]: *** [src/providers/grass/CMakeFiles/qgisgrass.dir/all] Error 2
Makefile:137: recipe for target 'all' failed
make: *** [all] Error 2





So I'm not sure what the hiccup is exactly. GRASS 7 is installed and 
runs fine outside of QGIS, but maybe it's missing some environment 
variables (like GISRC or GISDBASE) that QGIS needs to compile against it?





Donovan