[llvm-bugs] [Bug 34719] New: Build broken with glibc 2.26 on AArch64

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34719

            Bug ID: 34719
           Summary: Build broken with glibc 2.26 on AArch64
           Product: compiler-rt
           Version: 4.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: compiler-rt
          Assignee: unassignedbugs at nondot.org
          Reporter: tstellar at redhat.com
                CC: llvm-bugs at lists.llvm.org

This glibc commit[1] renamed the __reserved field from the m_context struct to
__glibc_reserved1,
which is causing build failure on aarch64:


lib/sanitizer_common/sanitizer_linux.cc: In function 'bool
__sanitizer::Aarch64GetESR(ucontext_t*, __sanitizer::u64*)':
lib/sanitizer_common/sanitizer_linux.cc:1268:35: error: 'struct mcontext_t' has
no member named '__reserved'; did you mean '__glibc_reserved1'?
   u8 *aux = ucontext->uc_mcontext.__reserved;
                                   ^~~~~~~~~~
                                   __glibc_reserved1


I have not tested trunk yet, but just from looking at the source code, it looks
like trunk compiler-rt will fail to compile too.
See also: https://sourceware.org/bugzilla/show_bug.cgi?id=21457

[1]
https://sourceware.org/git/?p=glibc.git;a=commit;h=4fa9b3bfe6759c82beb4b043a54a3598ca467289

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