Compiling buildtools on macOS hits 'fancy_abort()' error.

[robg2]

As reported on the forum here: ​https://discuss.haiku-os.org/t/macos-build-buildtools-failed, compiling buildtools on recent macOS versions hits this error:

In file included from /Volumes/haiku/buildtools/gcc/gcc/auto-profile.c:25:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/map:446:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/functional:1408:2: error: no member named 'fancy_abort' in
      namespace 'std::__1'; did you mean simply 'fancy_abort'?
        _VSTD::abort();
        ^~~~~~~

This appears to be a bug in gcc5.4.0. FreeBSD has a patch available here: ​https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216266

The attached patch applies these fixes to buildtools repository. I think this is fixed in gcc 5.5 and later.

[robg2]

Apply FreeBSD 'fancy_abort' fixes to buildtools.

[pulkomandy]

We have since updated to GCC7, which already fixes these problems.