From Vulkan SDK 1.3.250.1, MoltenVK cannot be used in C files due to [[deprecated]]

[DuncanHopkinsFoundry]

I am trying to include "MoltenVK/vk_mvk_moltenvk.h" into a C file (not a C++).

I am using Xcode 14.2 in the MESA code base, specifically "zink_screen.c".

Compilation fails due to the use of "[[deprecated]]" in "mvk_deprecated_api.h". Accord to cppreference.com this keyword is a 'C++14' keyword and not a 'C' keyword until 'C23'. As meson builds "*.c" as C11 and not C++ the compiler is failing. The C++ language is already set to C++17 and upping the C language as far as C23 is too far.

I personally have found a work around, to use the "VK_NO_PROTOTYPES" define to hide that part of the header.

[billhollings]

The vk_mvk_moltenvk.h file is deprecated legacy, and includes the following text:

/**
 * This header is provided for legacy compatibility only. This header contains obsolete and
 * deprecated MoltenVK functions, that were originally part of the obsolete and deprecated
 * non-standard VK_MVK_moltenvk extension, and use of this header is not recommended.
 *
 * Instead, in your application, use the following header file:
 *
 *     #include <MoltenVK/mvk_vulkan.h>
 *
 * And if you require the MoltenVK Configuration API, also include the following header file:
 *
 *     #include <MoltenVK/mvk_config.h>
 *
 * If you require access to Metal objects underlying equivalent Vulkan objects,
 * use the standard Vulkan VK_EXT_metal_objects extension.
 */

[archbirdplus]

I ran into this problem as well when using command-line clang 15.0, but switching to clang 17.0 resolved it. It looks like [[deprecated]] is supported just fine in newer versions of clang.