Suppress new Clang warnings on memcpy of nontrivially-copyable objects (#22798)

See llvm/llvm-project#111434

---------

Co-authored-by: Alon Zakai <[email protected]>

Author: dschuff

ChangeLog.md

@@ -20,6 +20,10 @@ See docs/process.md for more on how version tagging works.
 
 3.1.71 (in development)
 -----------------------
+- LLVM's `-Wnontrivial-memaccess` warning has been updated to also warn about
+  passing non-trivially-copyable destrination parameter to `memcpy`,
+  `memset` and similar functions for which it is a documented undefined
+  behavior (#22798). See https://github.com/llvm/llvm-project/pull/111434
 
 3.1.70 - 10/25/24
 -----------------

test/test_core.py

@@ -6795,6 +6795,7 @@ def test_bullet(self, use_cmake):
       '-Wno-format',
       '-Wno-bitfield-constant-conversion',
       '-Wno-int-to-void-pointer-cast',
+      '-Wno-nontrivial-memaccess',
     ]
 
     # extra testing for ASSERTIONS == 2
@@ -6818,7 +6819,7 @@ def test_bullet(self, use_cmake):
   @is_slow_test
   def test_poppler(self):
     # See https://github.com/emscripten-core/emscripten/issues/20757
-    self.emcc_args.append('-Wno-deprecated-declarations')
+    self.emcc_args.extend(['-Wno-deprecated-declarations', '-Wno-nontrivial-memaccess'])
     poppler = self.get_poppler_library()
     shutil.copy(test_file('poppler/paper.pdf'), '.')