[Bug bootstrap/83903] New: gcc 8.0.0 20180114 fails to bootstrap on Darwin x86_64, undeclared ASM_OUTPUT_DEF

[andrewm.roberts at sky dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83903

            Bug ID: 83903
           Summary: gcc 8.0.0 20180114 fails to bootstrap on Darwin
                    x86_64, undeclared ASM_OUTPUT_DEF
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: andrewm.roberts at sky dot com
  Target Milestone: ---

Building gcc 8.0.0 20180114 on Darwin (OS X) with llvm fails with an undeclared
identifier:

.../../gcc-8.0.0/gcc/config/i386/i386.c:10961:7: error: use of undeclared
      identifier 'ASM_OUTPUT_DEF'
      ASM_OUTPUT_DEF (asm_out_file, alias, name);

clang -v
Apple LLVM version 9.0.0 (clang-900.0.39.2)
Target: x86_64-apple-darwin17.3.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault
.xctoolchain/usr/bin

uname -a
Darwin Andrews-Mac-mini.local 17.3.0 Darwin Kernel Version 17.3.0: Thu Nov  9
18
:09:22 PST 2017; root:xnu-4570.31.3~1/RELEASE_X86_64 x86_64

gcc is configured with:

../gcc-8.0.0/configure --prefix=/usr/local/gcc-8.0.0 --program-suffix=
--disable-werror --enable-checking=release --enable-languages=c,c++,fortran,lto
--disable-libgcj --host=x86_64-apple-darwin17.3.0
--build=x86_64-apple-darwin17.3.0 --disable-bootstrap

gcc 7.2.0 builds fine on the same system, using the same configuration. This is
an upto date Mac with current Apple toochain.