base-system@gentoo.org Gentoo Base System support unofficial APNG (Animated PNG) spec cpe:/a:libpng:libpng apng For building against. This is the only slot that provides headers and command line tools. For binary compatibility, provides libpng12.so.0 only. For binary compatibility, provides libpng15.so.15 only. Reflect ABI compatibility for libpng.so.