rusticl: link the C++ runtime statically

Apparently some applications don't have their C++ situation under control.

Cc: mesa-stable
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/work_items/14090
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41037>
(cherry picked from commit 528ceeb49b)

.pick_status.json

@@ -3204,7 +3204,7 @@
         "description": "rusticl: link the C++ runtime statically",
         "nominated": true,
         "nomination_type": 1,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null,
         "notes": null

docs/relnotes/new_features.txt

@@ -52,3 +52,4 @@ multiDrawIndirect on pvr
 depthBiasClamp on pvr
 wideLines on pvr
 VK_EXT_rgba10x6_formats on panvk
+static C++ stdlib required on rusticl to workaround applications using their own C++ stdlib

src/gallium/targets/rusticl/meson.build

@@ -52,6 +52,12 @@ librusticl = shared_library(
     ld_args_gc_sections,
     ld_args_bsymbolic,
     rusticl_ld_args,
+    # Seems like some proprietary apps ship libraries exporting C++ STL symbols.
+    # So let's just link statically against the standard C++ library then in order to prevent data
+    # layout mismatches and the likes.
+    cc.get_supported_link_arguments(
+      '-static-libstdc++',
+    ),
   ],
   link_depends : rusticl_ld_depends,
   version : '@0@.0.0'.format(opencl_version),