+ if_feature "libpng"
+ {
+ source "source/graphics/png";
+ };
+ if_feature "devil"
+ {
+ source "source/graphics/devil";
+ };
+ if_arch "windows"
+ {
+ overlay "windows";
+ if_feature "opengl"
+ {
+ overlay "wgl";
+ };
+ };
+ if_arch "darwin"
+ {
+ overlay "cocoa";
+ if_feature "opengl"
+ {
+ overlay "cgl";
+ };
+ };
+ if_arch "!windows & !darwin"
+ {
+ overlay "x11";
+ if_feature "opengl"
+ {
+ overlay "glx";
+ };
+ };
+ install true;
+ install_map
+ {
+ map "source" "include/msp";
+ };