From 0f8cf66387c803146ba6f59019b9995566b1ddcc Mon Sep 17 00:00:00 2001
From: Brad Smith <brad@comstyle.com>
Date: Fri, 15 Dec 2023 19:46:04 -0500
Subject: [PATCH] Expose zlib constants for backwards compat #747

Building a project that had an internal copy of minizip 1.x, but
preferring an external library, with minizip 4.x showed that the
compat layer was not exposing some constants from zlib that
minizip 1.x headers did.
---
 CMakeLists.txt | 4 +++-
 mz_compat.h    | 7 ++++---
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index da2456a0..92c841da 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -711,7 +711,9 @@ target_include_directories(${MINIZIP_TARGET} PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>)
 if(MZ_COMPAT)
     target_include_directories(${MINIZIP_TARGET} PUBLIC
-        $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>)
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
+        ${ZLIB_SOURCE_DIR}
+        ${ZLIB_BINARY_DIR})
 endif()
 
 # Install files
diff --git a/mz_compat.h b/mz_compat.h
index 47153ea2..cc1fa07c 100644
--- a/mz_compat.h
+++ b/mz_compat.h
@@ -15,6 +15,10 @@
 
 #include "mz.h"
 
+#ifndef ZLIB_H
+#include <zlib.h>
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -147,9 +151,6 @@ typedef const char *zipcharpc;
 #define ZIP_BADZIPFILE                  (-103)
 #define ZIP_INTERNALERROR               (-104)
 
-#ifndef Z_DEFLATED
-#define Z_DEFLATED                      (8)
-#endif
 #define Z_BZIP2ED                       (12)
 
 #define APPEND_STATUS_CREATE            (0)