[cfe-dev] llvm fails to build on MacOS prior to 10.12

[Arthur O'Dwyer via cfe-dev]

Confirmed! Thanks for the super quick fix!

On Tue, May 7, 2019 at 11:13 AM Adrian Prantl <aprantl at apple.com> wrote:

> Should be fixed by r360174.
>
> -- adrian
>
> > On May 7, 2019, at 9:26 AM, Arthur O'Dwyer <arthur.j.odwyer at gmail.com>
> wrote:
> >
> > Adrian,
> >
> > Your recent commit
> > https://github.com/llvm-mirror/llvm/commit/e8c5427c
> > causes build failures for me locally on Mac OSX 10.11.6 using a stock
> (and I guess fairly old) Xcode Clang.
> >
> > Is there any way to fix trunk so that your new code is #ifdef'ed out for
> versions of Clang that don't support this bizarre __builtin_available(macos
> 10.12, *) syntax?  Or maybe hide it behind a macro?
> >
> > Thanks in advance,
> > Arthur
> >
> > In file included from $ROOT/llvm/lib/Support/Path.cpp:1113:
> > $ROOT/llvm/lib/Support/Unix/Path.inc:1140:27: error: use of undeclared
> identifier 'macos'; did you mean 'acos'?
> >   if (__builtin_available(macos 10.12, *)) {
> >                           ^~~~~
> >                           acos
> > /usr/include/math.h:323:15: note: 'acos' declared here
> > extern double acos(double);
> >               ^
> > In file included from $ROOT/llvm/lib/Support/Path.cpp:1113:
> > $ROOT/llvm/lib/Support/Unix/Path.inc:1147:14: error: use of undeclared
> identifier 'COPYFILE_CLONE'
> >       Flag = COPYFILE_CLONE;
> >              ^
> > 2 errors generated.
> >
>
>
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