version: 1.5.x
source: osgeo.org
installer: PostGIS

parallel: no

In the postgis source:

export MACOSX_DEPLOYMENT_TARGET=10.6
export CFLAGS="-Os -arch i386 -arch x86_64"
export PG_CPPFLAGS="-arch i386 -arch x86_64"
export SHLIB_LINK="-arch i386 -arch x86_64"
export LDFLAGS="-arch i386 -arch x86_64"
./configure --with-pgconfig=/usr/local/pgsql/bin/pg_config --mandir=/usr/local/pgsql/man \
--with-geosconfig=/usr/local/bin/geos-config --with-projdir=/usr/local
make
sudo make install

In the postgis source:

export MACOSX_DEPLOYMENT_TARGET=10.5
export CFLAGS="-Os -arch ppc -arch i386 -arch ppc64 -arch x86_64"
export PG_CPPFLAGS="-arch ppc -arch i386 -arch ppc64 -arch x86_64"
export SHLIB_LINK="-arch ppc -arch i386 -arch ppc64 -arch x86_64"
export LDFLAGS="-arch ppc -arch i386 -arch ppc64 -arch x86_64"
./configure --with-pgconfig=/usr/local/pgsql/bin/pg_config --mandir=/usr/local/pgsql/man \
--with-geosconfig=/usr/local/bin/geos-config --with-projdir=/usr/local
make
sudo make install

In the postgis source:

export MACOSX_DEPLOYMENT_TARGET=10.4
export CFLAGS="-Os -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk"
export PG_CPPFLAGS="-arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk"
export SHLIB_LINK="-arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk"
export LDFLAGS="-arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk"
./configure --with-pgconfig=/usr/local/pgsql/bin/pg_config --mandir=/usr/local/pgsql/man \
--with-geosconfig=/usr/local/bin/geos-config --with-projdir=/usr/local
make
sudo make install

To use the GEOS and PROJ frameworks substitute the following for the geosconfig and prodirdir options:

--with-geosconfig=/Library/Frameworks/GEOS.framework/Programs/geos-config \
--with-projdir=/Library/Frameworks/PROJ.framework/unix

See the Installation section of the README.postgis document.