Link to zlib for pcbnew due to step

pcbnew/CMakeLists.txt

@@ -671,13 +671,6 @@ make_lexer(
     DSN
     )
 
-# CMake <3.9 can't link anything to object libraries,
-# but we only need include directories, as we will link the kiface MODULE
-if( MINGW )
-    # at least on msys2, zlib must be added to gzip-hpp
-    set( EXTRA_LIB z )
-endif()
-
 target_link_libraries( pcbnew_kiface_objects
     PRIVATE
         common
@@ -688,6 +681,7 @@ target_link_libraries( pcbnew_kiface_objects
         rectpack2d
         gzip-hpp
         ${EXTRA_LIB}
+        ${ZLIB_LIBRARIES}
         ${OCC_LIBRARIES}
     )