[all-commits] [llvm/llvm-project] 875d24: [ELF] Avoid list initialization with incomplete un...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 875d24c2302cf0194fdd44b012623f395a705863
      https://github.com/llvm/llvm-project/commit/875d24c2302cf0194fdd44b012623f395a705863
  Author: Fangrui Song <i at maskray.me>
  Date:   2024-11-17 (Sun, 17 Nov 2024)

  Changed paths:
    M lld/ELF/Config.h

  Log Message:
  -----------
  [ELF] Avoid list initialization with incomplete unique_ptr<OutputSection> member to work around clang < 16

Commit 5b1b6a62b8bd986adc711d0c0be5b6a8182be263 introduced the following
issue for older clang with libstdc++

```
In file included from /home/ray/llvm/lld/ELF/EhFrame.cpp:18:
In file included from /home/ray/llvm/lld/ELF/EhFrame.h:12:
In file included from /home/ray/llvm/lld/include/lld/Common/LLVM.h:21:
In file included from /home/ray/llvm/llvm/include/llvm/Support/Casting.h:20:
In file included from /usr/lib64/gcc/x86_64-pc-linux-gnu/14.2.1/../../../../include/c++/14.2.1/memory:78:
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.2.1/../../../../include/c++/14.2.1/bits/unique_ptr.h:91:16: error: invalid application of 'sizeof' to an incomplete type 'lld::elf::OutputSection'
        static_assert(sizeof(_Tp)>0,
                      ^~~~~~~~~~~
/usr/lib64/gcc/x86_64-pc-linux-gnu/14.2.1/../../../../include/c++/14.2.1/bits/unique_ptr.h:398:4: note: in instantiation of member function 'std::default_delete<lld::elf::OutputSection>::operator()' requested here
          get_deleter()(std::move(__ptr));
          ^
/home/ray/llvm/lld/ELF/Config.h:574:19: note: in instantiation of member function 'std::unique_ptr<lld::elf::OutputSection>::~unique_ptr' requested here
  OutSections out{};
                  ^
```



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