CMake: Test static builds.

CMakeLists.txt

@@ -231,6 +231,8 @@ endif(ZLIB_INSTALL_LIBRARIES)
 #============================================================================
 if(ZLIB_BUILD_TESTING)
     enable_testing()
+
+    if(ZLIB_BUILD_SHARED)
         add_executable(zlib_example test/example.c)
         target_link_libraries(zlib_example ZLIB::ZLIB)
         add_test(zlib_example zlib_example)
@@ -248,6 +250,27 @@ if(ZLIB_BUILD_TESTING)
             target_compile_definitions(minigzip64 PRIVATE LARGEFILE64_SOURCE=1)
             target_link_libraries(minigzip64 ZLIB::ZLIB)
         endif(HAVE_OFF64_T)
+    endif(ZLIB_BUILD_SHARED)
+
+    if(ZLIB_BUILD_STATIC)
+        add_executable(zlib_static_example test/example.c)
+        target_link_libraries(zlib_static_example ZLIB::ZLIBSTATIC)
+        add_test(zlib_static_example zlib_static_example)
+
+        add_executable(static_minigzip test/minigzip.c)
+        target_link_libraries(static_minigzip ZLIB::ZLIBSTATIC)
+
+        if(HAVE_OFF64_T)
+            add_executable(zlib_static_example64 test/example.c)
+            target_compile_definitions(zlib_static_example64 PRIVATE LARGEFILE64_SOURCE=1)
+            target_link_libraries(zlib_static_example64 ZLIB::ZLIBSTATIC)
+            add_test(zlib_static_example64 zlib_static_example64)
+
+            add_executable(static_minigzip64 test/minigzip.c)
+            target_compile_definitions(static_minigzip64 PRIVATE LARGEFILE64_SOURCE=1)
+            target_link_libraries(static_minigzip64 ZLIB::ZLIBSTATIC)
+        endif(HAVE_OFF64_T)
+    endif(ZLIB_BUILD_STATIC)
 
     add_subdirectory(test)
 endif(ZLIB_BUILD_TESTING)