Mesa (main): dzn: Disable Wunused-value for C++ files

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Module: Mesa
Branch: main
Commit: 6c1ab8fdebfca4c8f3f501a4e0606e8e07d4ba35
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=6c1ab8fdebfca4c8f3f501a4e0606e8e07d4ba35

Author: Jesse Natalie <jenatali at microsoft.com>
Date:   Fri Jul  8 07:53:10 2022 -0700

dzn: Disable Wunused-value for C++ files

Reviewed-by: Boris Brezillon <boris.brezillon at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17423>

---

 src/microsoft/vulkan/meson.build | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/microsoft/vulkan/meson.build b/src/microsoft/vulkan/meson.build
index c61ba03add8..990fe675a20 100644
--- a/src/microsoft/vulkan/meson.build
+++ b/src/microsoft/vulkan/meson.build
@@ -57,6 +57,7 @@ dzn_deps = [
 ]
 
 dzn_flags = [ ]
+dzn_cpp_flags = [ ]
 
 if with_platform_windows
   dzn_flags += '-DVK_USE_PLATFORM_WIN32_KHR'
@@ -72,6 +73,7 @@ if cc.get_argument_syntax() != 'msvc'
     '-Werror=switch',
   ]
   dzn_flags += cc.get_supported_arguments(dzn_flags_to_try)
+  dzn_cpp_flags = cpp.get_supported_arguments(['-Wno-error=unused-value'])
 endif
 
 libvulkan_dzn = shared_library(
@@ -84,6 +86,7 @@ libvulkan_dzn = shared_library(
   ],
   dependencies : [dzn_deps, idep_vulkan_wsi],
   c_args : dzn_flags,
+  cpp_args : dzn_cpp_flags,
   gnu_symbol_visibility : 'hidden',
   link_args : [ld_args_bsymbolic, ld_args_gc_sections],
   name_prefix : host_machine.system() == 'windows' ? '' : 'lib',