| /* |
| * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This header file is used to hijack the include of "zlib.h" from libpng on |
| * Macos. We do that to be able to build on macos 10.13 or later, but still |
| * keep binary compatibility with older versions (as specified to configure). |
| * |
| * The problem is that in 10.13, Macos shipped with a newer version of zlib, |
| * which exports the function inflateValidate. There is a call to this |
| * function in pngrutil.c, guarded by a preprocessor check of ZLIB_VERNUM being |
| * high enough. If we compile this call in and link to the newer version of |
| * zlib, we will get link errors if the code is executed on an older Mac with |
| * an older version of zlib. |
| * |
| * The zlib.h header in Macos has been annotated with Macos specific macros that |
| * guard these kinds of version specific APIs, but libpng is not using those |
| * checks in its conditionals, just ZLIB_VERNUM. To fix this, we check for the |
| * MAC_OS_X_VERSION_MIN_REQUIRED macro here and adjust the ZLIB_VERNUM to the |
| # known version bundled with that release. This solution is certainly a hack, |
| * but it seems the affected versions of zlib.h are compatible enough for this |
| * to work. |
| */ |
| |
| #include <zlib.h> |
| #include <AvailabilityMacros.h> |
| |
| #if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12 |
| # undef ZLIB_VERNUM |
| # define ZLIB_VERNUM 0x1250 |
| #elif MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_13 |
| # undef ZLIB_VERNUM |
| # define ZLIB_VERNUM 0x1280 |
| #endif |
