How to set a ldflag for a library in home folder

I followed the following manual http://photivo.org/photivo/download_and_setup/linux how to compile Photivo on Sabayon: graphicsmagick 16 bit wget -c http://sourceforge.net/projects/graphicsmagick/files/graphicsmagick/1.3.18/GraphicsMagick-1.3.18.tar.gz tar xfvz GraphicsMagick-1.3.18.tar.gz ./configure --prefix=/home/mictadlo/apps/ --with-quantum-depth=16 --enable-shared --without-lcms make make install Photivo sudo equo install mercurial hg clone https://code.google.com/p/photivo qmake PREFIX=~/apps/ CONFIG+=WithGimp make make install Error: $ photivo Photivo version 2013-03-17 (rev 57519a52a791) Fontconfig error: Cannot load config file "infinality/conf.d" Fatal error: Wrong GraphicsMagick quantum depth! Found quantum depth 8. Photivo needs at least 16. What did I do wrong?