[PATCH] D90075: [libunwind] Add -Wno-dll-attribute-on-redeclaration when building for windows

[Martin Storsjö via Phabricator via llvm-commits]

mstorsjo created this revision.
mstorsjo added reviewers: libunwind, compnerd, rnk.
Herald added subscribers: llvm-commits, mgorny.
Herald added projects: LLVM, libunwind.
Herald added 1 blocking reviewer(s): libunwind.
mstorsjo requested review of this revision.

It's not worth trying to fix these warnings within libunwind, instead silence them.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90075

Files:
  libunwind/CMakeLists.txt


Index: libunwind/CMakeLists.txt
===================================================================
--- libunwind/CMakeLists.txt
+++ libunwind/CMakeLists.txt
@@ -203,6 +203,14 @@
 
 add_compile_flags_if_supported(-Wno-suggest-override)
 
+if (WIN32)
+  # The headers lack matching dllexport attributes (_LIBUNWIND_EXPORT);
+  # silence the warning instead of cluttering the headers (which aren't
+  # necessarily the ones that the callers will use anyway) with the
+  # attributes.
+  add_compile_flags_if_supported(-Wno-dll-attribute-on-redeclaration)
+endif()
+
 if (LIBUNWIND_ENABLE_WERROR)
   add_compile_flags_if_supported(-Werror)
   add_compile_flags_if_supported(-WX)


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