There is confusion between "HAVE" and "HAS".
Is cmake considered official and supported?

Searching for '_STDINT_H'...
c:\s\zlib\CMakeLists.txt(24):check_include_file(stdint.h HAVE_STDINT_H)
c:\s\zlib\CMakeLists.txt(37):if(HAVE_STDINT_H)
c:\s\zlib\CMakeLists.txt(38): list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_STDINT_H)
c:\s\zlib\contrib\minizip\ioapi.h(89):#ifdef HAS_STDINT_H
4 occurrence(s) have been found.

and cmake's HAVE_STDDEF_H and HAVE_SYS_TYPES_H appear unused