Fix for older cmake versions and build of examples.

CMakeLists.txt

@@ -1,5 +1,12 @@
-PROJECT(miniz C)
-cmake_minimum_required(VERSION 3.4)
+cmake_minimum_required(VERSION 3.0)
+
+if(CMAKE_MINOR_VERSION LESS 12)
+  project(miniz)
+  # see issue https://gitlab.kitware.com/cmake/cmake/merge_requests/1799
+else()
+  project(miniz C)
+endif()
+
 
 set(Upstream_VERSION 2.1.0)
 
@@ -81,6 +88,8 @@ else(AMALGAMATE_SOURCES)
     string(TOUPPER ${PROJECT_NAME} PROJECT_UPPER)
     set_target_properties(${PROJECT_NAME}
         PROPERTIES INTERFACE_COMPILE_DEFINITIONS ${PROJECT_UPPER}_STATIC_DEFINE)
+  else()
+    set_property(TARGET ${PROJECT_NAME} PROPERTY C_VISIBILITY_PRESET hidden)
   endif()
 
   set_property(TARGET ${PROJECT_NAME} PROPERTY VERSION ${Upstream_VERSION})

miniz.h

@@ -112,10 +112,7 @@
 */
 #pragma once
 
-#include "miniz_common.h"
-#include "miniz_tdef.h"
-#include "miniz_tinfl.h"
-#include "miniz_zip.h"
+#include "miniz_export.h"
 
 /* Defines to completely disable specific portions of miniz.c: 
    If all macros here are defined the only functionality remaining will be CRC-32, adler-32, tinfl, and tdefl. */
@@ -476,3 +473,8 @@ typedef void *const voidpc;
 #ifdef __cplusplus
 }
 #endif
+
+#include "miniz_common.h"
+#include "miniz_tdef.h"
+#include "miniz_tinfl.h"
+#include "miniz_zip.h"

miniz_tdef.c

@@ -24,7 +24,6 @@
  *
  **************************************************************************/
 
-#include "miniz_tdef.h"
 #include "miniz.h"
 
 #ifdef __cplusplus

miniz_tinfl.c

@@ -24,7 +24,7 @@
  *
  **************************************************************************/
 
-#include "miniz_tinfl.h"
+#include "miniz.h"
 
 #ifdef __cplusplus
 extern "C" {

miniz_zip.c

@@ -24,7 +24,7 @@
  * THE SOFTWARE.
  *
  **************************************************************************/
-#include "miniz_zip.h"
+#include "miniz.h"
 
 #ifndef MINIZ_NO_ARCHIVE_APIS