=> Bootstrap dependency digest>=20010302: found digest-20111104 => Bootstrap dependency fetch-[0-9]*: found fetch-1.7 => Checksum SHA1 OK for optipng-0.7.2.tar.gz => Checksum RMD160 OK for optipng-0.7.2.tar.gz ===> Installing dependencies for optipng-0.7.2 => Build dependency checkperms>=1.1: found checkperms-1.11 => Full dependency zlib>=1.2.3: found zlib-1.2.7 => Full dependency png>=1.5.0: found png-1.5.12 ===> Overriding tools for optipng-0.7.2 ===> Extracting for optipng-0.7.2 ===> Patching for optipng-0.7.2 ===> Creating toolchain wrappers for optipng-0.7.2 ===> Configuring for optipng-0.7.2 => Checking for portability problems in extracted files Checking for gcc... Checking for system libpng... Checking for system zlib...