To install Grass7 + a working gdal-grass plug-in :

checkout grass from svn :

svn checkout https://svn.osgeo.org/grass/grass/trunk grass_trunk

on osx to configure/install it i used the William Kyngesbuty framework ('http://www.kyngchaos.com/software:frameworks'), tcltk framework ('http://www.activestate.com/activetcl/') :


export CXXFLAGS="-arch ppc -arch i386 -Os" ; export CFLAGS="-arch ppc -arch i386 -Os" ; export LDFLAGS="-arch ppc -arch i386 -Os" ; export GDAL_BIN=/Library/Frameworks/gdal.framework/unix/bin/ ; export NAD2BIN=/Library/Frameworks/PROJ.framework/Programs/nad2bin

./configure --with-freetype --with-freetype-includes="/Library/Frameworks/FreeType.framework/unix/include/freetype2 /Library/Frameworks/FreeType.framework/unix/include" --with-freetype-libs=/Library/Frameworks/FreeType.framework/unix/lib --with-gdal=/Library/Frameworks/gdal.framework/Programs/gdal-config --with-proj --with-proj-includes=/Library/Frameworks/PROJ.framework/unix/include --with-proj-libs=/Library/Frameworks/PROJ.framework/unix/lib --with-proj-share=/Library/Frameworks/PROJ.framework/Resources/proj --with-jpeg-includes=/Library/Frameworks/UnixImageIO.framework/unix/include --with-jpeg-libs=/Library/Frameworks/UnixImageIO.framework/unix/lib --with-png-includes=/Library/Frameworks/UnixImageIO.framework/unix/include --with-png-libs=/Library/Frameworks/UnixImageIO.framework/unix/lib --with-tiff-includes=/Library/Frameworks/UnixImageIO.framework/unix/include --with-tiff-libs=/Library/Frameworks/UnixImageIO.framework/unix/lib --without-mysql --with-odbc --with-sqlite --with-sqlite-libs=/Library/Frameworks/SQLite3.framework/unix/lib --with-sqlite-includes=/Library/Frameworks/SQLite3.framework/unix/include --with-fftw-includes=/Library/Frameworks/FFTW3.framework/unix/include --with-fftw-libs=/Library/Frameworks/FFTW3.framework/unix/lib --with-cxx --with-opengl=aqua --with-x --without-glw --with-tcltk-includes="/Library/Frameworks/Tcl.framework/Headers /Library/Frameworks/Tk.framework/Headers /Library/Frameworks/Tk.framework/PrivateHeaders" --with-python --with-wxwidgets=/usr/bin/wx-config --with-postgres --with-postgres-includes=/usr/local/pgsql/include/ --with-postgres-libs=/usr/local/pgsql/lib/ --prefix=/usr/local --with-geos=/Library/Frameworks/GEOS.framework/Versions/3/Programs/geos-config --with-pthread --enable-largefile --with-ffmpeg --with-ffmpeg-includes=/Users/Shared/Development/ossim_dependencies/include/ffmpeg/ --without-cairo


then build only the grass7 libs using a Quad Architecture flags (see Install_grasslib.txt)