Notes for zlib (done)

• Module at ext_libraries/modules/zlib/1.3.2/
• Target: @zlib//:zlib

VS2008 compatibility

• gz*.c files excluded from build (gzread, gzwrite, gzclose use EWOULDBLOCK not available in VS2008)

Z_PREFIX

• Built with Z_PREFIX define — all exported symbols are prefixed with z_
• All consumers must also define Z_PREFIX and SYSTEM_ZLIB in their copts/defines