Disable cmake message concerning WIN32 on non-windows systems

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8e3ae95abf4b2768a767d2d152e625269eb7dbc5..3eda27953f19bb35f170295db83863b2ee5e6813 100644 (file)
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -726,7 +726,7 @@ else()
                set(OTHER_FLAGS "${OTHER_FLAGS} -Wsign-compare")
        endif()
 
-       if(NOT ZLIBWAPI_DLL AND CMAKE_SIZEOF_VOID_P EQUAL 4)
+       if(WIN32 AND NOT ZLIBWAPI_DLL AND CMAKE_SIZEOF_VOID_P EQUAL 4)
                set(OTHER_FLAGS "${OTHER_FLAGS} -DWIN32_NO_ZLIB_WINAPI")
                message(WARNING "Defaulting to cdecl for zlib on win32 because ZLIBWAPI_DLL"
                        " isn't set, ensure that ZLIBWAPI_DLL is set if you want stdcall.")