Put back the zlib prefix logic.

zlib/zlib.patch

@@ -1,6 +1,6 @@
 diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
---- zlib/CMakeLists.txt	2024-03-06 17:27:21.587097505 -0500
-+++ ZLIB_BLD/CMakeLists.txt	2024-03-06 17:27:09.643291842 -0500
+--- zlib/CMakeLists.txt	2024-03-06 18:22:33.423844858 -0500
++++ ZLIB_BLD/CMakeLists.txt	2024-03-06 18:21:58.292423507 -0500
 @@ -3,6 +3,13 @@
 
  project(zlib C)
@@ -15,9 +15,20 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
  set(VERSION "1.3.1")
 
  option(ZLIB_BUILD_EXAMPLES "Enable Zlib Examples" ON)
-@@ -59,39 +66,23 @@
+@@ -58,40 +65,34 @@
+ #
  check_include_file(unistd.h 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)
++endif (DEFINED Z_PREFIX_STR)
++if (ENABLE_Z_PREFIX)
++  set(Z_PREFIX 1)
++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")
@@ -61,7 +72,7 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
  )
  set(ZLIB_PRIVATE_HDRS
      crc32.h
-@@ -122,14 +113,8 @@
+@@ -122,14 +123,8 @@
      zutil.c
  )
 
@@ -77,7 +88,7 @@ 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 +132,35 @@
+@@ -147,16 +142,35 @@
                              -o ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj
                              -i ${CMAKE_CURRENT_SOURCE_DIR}/win32/zlib1.rc)
      set(ZLIB_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
@@ -114,7 +125,7 @@ diff -Naur zlib/CMakeLists.txt ZLIB_BLD/CMakeLists.txt
      # This property causes shared libraries on Linux to have the full version
      # encoded into their final filename.  We disable this on Cygwin because
      # it causes cygz-${ZLIB_FULL_VERSION}.dll to be created when cygz.dll
-@@ -165,18 +169,12 @@
+@@ -165,18 +179,12 @@
      # 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})
@@ -137,7 +148,7 @@ 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 +185,7 @@
+@@ -187,12 +195,7 @@
  if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
      install(FILES ${ZLIB_PUBLIC_HDRS} DESTINATION "${INSTALL_INC_DIR}")
  endif()