zanmato1984 commented on code in PR #46509:
URL: https://github.com/apache/arrow/pull/46509#discussion_r2101465841


##########
cpp/cmake_modules/ThirdpartyToolchain.cmake:
##########
@@ -4845,6 +4845,15 @@ macro(build_opentelemetry)
       version)
   set(OPENTELEMETRY_BUILD_BYPRODUCTS)
   set(OPENTELEMETRY_LIBRARIES)
+  set(OPENTELEMETRY_CXX_FLAGS "${EP_CXX_FLAGS}")
+  # GH-46508: Supress warnings that won't be demoted by -Wno-error in recent 
Clang.
+  if((CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_COMPILER_VERSION
+                                                 VERSION_GREATER_EQUAL 
"19.1.0")
+     OR (CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang" AND 
CMAKE_CXX_COMPILER_VERSION
+                                                         VERSION_GREATER_EQUAL 
"17.0.0"))
+    string(APPEND OPENTELEMETRY_CXX_FLAGS
+           " -Wno-error=missing-template-arg-list-after-template-kw")

Review Comment:
   For TSAN I'm not sure if this is the case. I did debug a bit today but still 
no clue. It's much more difficult than I expected. Plus we have new emerging 
ASAN errors after suppressing the leak error.
   
   I'll keep looking but this will take quite some longer.



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