Try to make sure we have unistd.h for OSX

zlib/zlib.patch

@@ -1,6 +1,6 @@
 diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
---- zlib/CMakeLists.txt	2024-03-06 18:22:33.423844858 -0500
-+++ ZLIB_BLD/CMakeLists.txt	2024-03-06 18:21:58.292423507 -0500
+--- zlib/CMakeLists.txt	2024-03-14 20:07:06.811461199 -0400
++++ ZLIB_BLD/CMakeLists.txt	2024-03-14 20:02:42.716002504 -0400
 @@ -3,6 +3,13 @@
 
  project(zlib C)
@@ -15,10 +15,14 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
  set(VERSION "1.3.1")
 
  option(ZLIB_BUILD_EXAMPLES "Enable Zlib Examples" ON)
-@@ -58,40 +65,34 @@
+@@ -57,41 +64,38 @@
+ # Check for unistd.h
  #
  check_include_file(unistd.h Z_HAVE_UNISTD_H)
-
++if(Z_HAVE_UNISTD_H)
++  add_definitions(-DZ_HAVE_UNISTD_H)
++endif(Z_HAVE_UNISTD_H)
++
 +option(ENABLE_Z_PREFIX "Add z_ prefix to all library functions." OFF)
 +if (DEFINED Z_PREFIX_STR)
 +  set (ENABLE_Z_PREFIX ON CACHE BOOL "Ensure prefix is set" FORCE)
@@ -28,7 +32,7 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
 +endif (ENABLE_Z_PREFIX)
 +mark_as_advanced (ENABLE_Z_PREFIX)
 +mark_as_advanced (Z_PREFIX_STR)
-+
+ 
  if(MSVC)
 -    set(CMAKE_DEBUG_POSTFIX "d")
 +    #set(CMAKE_DEBUG_POSTFIX "d")
@@ -72,7 +76,7 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
  )
  set(ZLIB_PRIVATE_HDRS
      crc32.h
-@@ -122,14 +123,8 @@
+@@ -122,14 +126,8 @@
      zutil.c
  )
 
@@ -88,7 +92,7 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
  string(REGEX REPLACE ".*#define[ \t]+ZLIB_VERSION[ \t]+\"([-0-9A-Za-z.]+)\".*"
      "\\1" ZLIB_FULL_VERSION ${_zlib_h_contents})
 
-@@ -147,16 +142,35 @@
+@@ -147,16 +145,35 @@
                              -o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
                              -i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib1.rc)
      set(ZLIB_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
@@ -125,7 +129,7 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
      # This property causes shared libraries on Linux to have the full version
      # encoded into their final filename.  We disable this on Cygwin because
      # it causes cygz-${ZLIB_FULL_VERSION}.dll to be created when cygz.dll
-@@ -165,18 +179,12 @@
+@@ -165,18 +182,12 @@
      # This has no effect with MSVC, on that platform the version info for
      # the DLL comes from the resource file win32/zlib1.rc
      set_target_properties(zlib PROPERTIES VERSION ${ZLIB_FULL_VERSION})
@@ -148,7 +152,7 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
 
  if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
      install(TARGETS zlib zlibstatic
-@@ -187,12 +195,7 @@
+@@ -187,12 +198,7 @@
  if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
      install(FILES ${ZLIB_PUBLIC_HDRS} DESTINATION "${INSTALL_INC_DIR}")
  endif()
@@ -163,8 +167,8 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
  #============================================================================
  # Example binaries
 diff -Naur zlib/deflate.c ZLIB_BLD/deflate.c
---- zlib/deflate.c	2024-03-06 10:40:23.317104725 -0500
-+++ ZLIB_BLD/deflate.c	2024-03-06 10:28:32.672849320 -0500
+--- zlib/deflate.c	2024-03-14 20:07:06.811461199 -0400
++++ ZLIB_BLD/deflate.c	2024-03-14 19:58:58.475865772 -0400
 @@ -52,7 +52,7 @@
  #include "deflate.h"
 
@@ -174,9 +178,23 @@ diff -Naur zlib/deflate.c ZLIB_BLD/deflate.c
  /*
    If you use the zlib library in a product, an acknowledgment is welcome
    in the documentation of your product. If for some reason you cannot
+diff -Naur zlib/gzguts.h ZLIB_BLD/gzguts.h
+--- zlib/gzguts.h	2024-03-14 20:07:06.811461199 -0400
++++ ZLIB_BLD/gzguts.h	2024-03-14 20:06:50.839735639 -0400
+@@ -25,6 +25,10 @@
+ #  include <limits.h>
+ #endif
+
++#ifdef Z_HAVE_UNISTD_H
++#  include <unistd.h>
++#endif
++
+ #ifndef _POSIX_SOURCE
+ #  define _POSIX_SOURCE
+ #endif
 diff -Naur zlib/gzread.c ZLIB_BLD/gzread.c
---- zlib/gzread.c	2024-03-06 10:40:23.317104725 -0500
-+++ ZLIB_BLD/gzread.c	2024-03-06 10:28:32.672849320 -0500
+--- zlib/gzread.c	2024-03-14 20:07:06.811461199 -0400
++++ ZLIB_BLD/gzread.c	2024-03-14 20:06:03.664546399 -0400
 @@ -400,9 +400,7 @@
  }
 
@@ -189,8 +207,8 @@ diff -Naur zlib/gzread.c ZLIB_BLD/gzread.c
  #endif
  int ZEXPORT gzgetc(gzFile file) {
 diff -Naur zlib/inftrees.c ZLIB_BLD/inftrees.c
---- zlib/inftrees.c	2024-03-06 10:40:23.317104725 -0500
-+++ ZLIB_BLD/inftrees.c	2024-03-06 10:28:32.672849320 -0500
+--- zlib/inftrees.c	2024-03-14 20:07:06.811461199 -0400
++++ ZLIB_BLD/inftrees.c	2024-03-14 19:58:58.483865634 -0400
 @@ -9,7 +9,7 @@
  #define MAXBITS 15
 
@@ -201,8 +219,8 @@ diff -Naur zlib/inftrees.c ZLIB_BLD/inftrees.c
    If you use the zlib library in a product, an acknowledgment is welcome
    in the documentation of your product. If for some reason you cannot
 diff -Naur zlib/win32/zlib1.rc ZLIB_BLD/win32/zlib1.rc
---- zlib/win32/zlib1.rc	2024-03-06 19:12:16.939923796 -0500
-+++ ZLIB_BLD/win32/zlib1.rc	2024-03-06 19:12:32.387672768 -0500
+--- zlib/win32/zlib1.rc	2024-03-14 20:07:06.823460993 -0400
++++ ZLIB_BLD/win32/zlib1.rc	2024-03-14 19:58:58.483865634 -0400
 @@ -1,5 +1,5 @@
  #include <winver.h>
 -#include "../zlib.h"
@@ -211,7 +229,7 @@ diff -Naur zlib/win32/zlib1.rc ZLIB_BLD/win32/zlib1.rc
  #ifdef GCC_WINDRES
  VS_VERSION_INFO		VERSIONINFO
 diff -Naur zlib/zconf.h ZLIB_BLD/zconf.h
---- zlib/zconf.h	2024-03-06 10:40:23.317104725 -0500
+--- zlib/zconf.h	2024-03-14 20:07:06.815461130 -0400
 +++ ZLIB_BLD/zconf.h	1969-12-31 19:00:00.000000000 -0500
 @@ -1,543 +0,0 @@
 -/* zconf.h -- configuration of the zlib compression library
@@ -758,8 +776,8 @@ diff -Naur zlib/zconf.h ZLIB_BLD/zconf.h
 -
 -#endif /* ZCONF_H */
 diff -Naur zlib/zconf.h.in ZLIB_BLD/zconf.h.in
---- zlib/zconf.h.in	2024-03-06 10:40:23.317104725 -0500
-+++ ZLIB_BLD/zconf.h.in	2024-03-06 10:28:32.676849254 -0500
+--- zlib/zconf.h.in	2024-03-14 20:07:06.815461130 -0400
++++ ZLIB_BLD/zconf.h.in	2024-03-14 19:58:58.483865634 -0400
 @@ -3,8 +3,6 @@
   * For conditions of distribution and use, see copyright notice in zlib.h
   */
@@ -1145,7 +1163,7 @@ diff -Naur zlib/zconf.h.in ZLIB_BLD/zconf.h.in
  #  else
  #    define z_off64_t z_off_t
 diff -Naur zlib/zlib.h ZLIB_BLD/zlib.h
---- zlib/zlib.h	2024-03-06 10:40:23.317104725 -0500
+--- zlib/zlib.h	2024-03-14 20:07:06.815461130 -0400
 +++ ZLIB_BLD/zlib.h	1969-12-31 19:00:00.000000000 -0500
 @@ -1,1938 +0,0 @@
 -/* zlib.h -- interface of the 'zlib' general purpose compression library
@@ -3088,7 +3106,7 @@ diff -Naur zlib/zlib.h ZLIB_BLD/zlib.h
 -#endif /* ZLIB_H */
 diff -Naur zlib/zlib.h.in ZLIB_BLD/zlib.h.in
 --- zlib/zlib.h.in	1969-12-31 19:00:00.000000000 -0500
-+++ ZLIB_BLD/zlib.h.in	2024-03-06 10:28:32.676849254 -0500
++++ ZLIB_BLD/zlib.h.in	2024-03-14 19:58:58.483865634 -0400
 @@ -0,0 +1,1943 @@
 +/* zlib.h -- interface of the 'zlib' general purpose compression library
 +  version 1.3.1, January 22nd, 2024