[libcxx-commits] [libcxx] [libc++] Add std::stacktrace (P0881R7) (PR #136528)

[Steve O'Brien via libcxx-commits]

================
@@ -248,6 +254,11 @@ if (LIBCXX_ENABLE_SHARED)
   list(APPEND LIBCXX_BUILD_TARGETS "cxx_shared")
 endif()
 
+if(WIN32)
+  string(APPEND link_libraries " ${CMAKE_LINK_LIBRARY_FLAG}dbghelp")
+  string(APPEND link_libraries " ${CMAKE_LINK_LIBRARY_FLAG}psapi")
+endif()
+
----------------
elsteveogrande wrote:

TODO: this didn't seem to fix link issues:

```
  FAILED: [code=1] lib/libc++.dll lib/libc++.dll.a 
  C:\Windows\system32\cmd.exe /C "cd . && C:\llvm-mingw\bin\c++.exe -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -ffunction-sections -fdata-sections -O2 -g -DNDEBUG   -shared -o lib\libc++.dll -Wl,--out-implib,lib\libc++.dll.a -Wl,--major-image-version,1,--minor-image-version,0 libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_aux_runtime.cpp.obj libcxxabi/src/CMakeFiles/cxxabi_shared_objects.dir/cxa_default_handlers.cpp.obj 
  [ . . . ]
libcxx/src/CMakeFiles/cxx_shared.dir/filesystem/directory_iterator.cpp.obj libcxx/src/CMakeFiles/cxx_shared.dir/filesystem/operations.cpp.obj  -nostdlib++  --unwindlib=none  lib/libunwind.dll.a  -lpthread  -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 && cd ."
  ld.lld: error: undefined symbol: __declspec(dllimport) SymInitialize
  >>> referenced by D:/a/llvm-project/llvm-project/libcxx/src/stacktrace/windows_impl.cpp:35
  >>>               libcxx/src/CMakeFiles/cxx_shared.dir/stacktrace/windows_impl.cpp.obj:(std::__1::__stacktrace::_Trace::windows_impl(unsigned long long, unsigned long long))
```

https://github.com/llvm/llvm-project/pull/136528