- png16依赖于zlib,本质上需要编译两个库
 
# 编译ZLIB
prefix=${ZLIB_PREFIX}  CC=cc CFLAGS="-fPIC"   ./configure
make install
# 编译PNG
 ./configure --prefix=${PREFIX}   LDFLAGS="-L${ZLIB_PREFIX}/lib/"  CPPFLAGS="-I${ZLIB_PREFIX}/include -fPIC"
make install
# 编译ZLIB
prefix=${ZLIB_PREFIX}  CC=cc CFLAGS="-fPIC"   ./configure
make install
# 编译PNG
 ./configure --prefix=${PREFIX}   LDFLAGS="-L${ZLIB_PREFIX}/lib/"  CPPFLAGS="-I${ZLIB_PREFIX}/include -fPIC"
make install