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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/97827] bootstrap error building the amdgcn-amdhsa
 offload compiler with LLVM 11
Date: Tue, 17 Nov 2020 12:45:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97827

--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Now filled  https://bugs.llvm.org/show_bug.cgi?id=3D48201  for this

LLVM and GNU as ("gas") tried to align, cf. discussion
  https://sourceware.org/legacy-ml/binutils/2020-02/msg00091.html
and the GAS patch to turn a warning to an error:
  https://sourceware.org/legacy-ml/binutils/2020-02/msg00129.html


However, while llvm/lib/MC/MCParser/ELFAsmParser.cpp always issues an error:

+  if (Section->getType() !=3D Type)
+    Error(loc, "changed section type for " + SectionName + ", expected: 0x=
" +
+                   utohexstr(Section->getType()));
etc.

The GNU assembler only does so if flags have been specified,
gas/config/obj-elf.c:

      if (attr !=3D 0)
        {=20
          /* If section attributes are specified the second time we see a
             particular section, then check that they are the same as we
             saw the first time.  */
          if (((old_sec->flags ^ flags)
...=