[llvm-bugs] [Bug 42182] New: "cannot compile this non-trivial TLS destruction yet", when compiling with -fno-use-cxa-atexit

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=42182

            Bug ID: 42182
           Summary: "cannot compile this non-trivial TLS destruction yet",
                    when compiling with -fno-use-cxa-atexit
           Product: clang
           Version: unspecified
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: gmc at synopsys.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Compiler reports being unable to compile the following code "yet"...

class foo {
public:
  foo();
  ~foo();
};

void some_func (void)
{
  foo thread_local my_var;
}


The error only happens when compiling with the “-fno-use-cxa-atexit” flag:

$ clang++  -fno-use-cxa-atexit  -o foo.o  -c foo.cxx

foo.cxx:9:20: error: cannot compile this non-trivial TLS destruction yet
  foo thread_local my_var;
                   ^

Issue exists with clang 7.1.0, 8, and trunk (as of May 18th content)

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