klange@megpoid strawberry-dev ~/toaruos$ pkg-config --list-all
libpng15     libpng - Loads and saves PNG files
libpng       libpng - Loads and saves PNG files
cairo-svg    cairo-svg - SVG surface backend for cairo graphics library
freetype2    FreeType 2 - A free, high-quality, and portable font engine.
cairo-png    cairo-png - PNG functions for cairo graphics library
zlib         zlib - zlib compression library
cairo-script cairo-script - script surface backend for cairo graphics library
cairo-ft     cairo-ft - FreeType font backend for cairo graphics library
glu          glu - Mesa OpenGL Utility library
pixman-1     Pixman - The pixman library (version 1)
cairo        cairo - Multi-platform 2D graphics library
osmesa       osmesa - Mesa Off-screen Rendering library
klange@megpoid strawberry-dev ~/toaruos$ pkg-config --libs libpng
-L/home/klange/toaruos/toolchain/local/i686-pc-toaru/lib -lpng15
klange@megpoid strawberry-dev ~/toaruos$ env | grep PKG
PKG_CONFIG_LIBDIR=/home/klange/toaruos/toolchain/local/i686-pc-toaru/lib/pkgconfig