zig assumes libstdc++ is present

[jwh]

As per https://github.com/ziglang/zig/blob/master/build.zig#L301, zig assumes libstdc++ is present which it is not on pure llvm systems, perhaps something passed down by cmake (or detected during build) is appropriate here

[andrewrk]

What system is it in this case?

[andrewrk]

Note: the answer was:

<jwh> andrewrk: its abyss in this case (experimental)
<jwh> -lc++ should be enough, clang is built with libc++ as stdlib also
<jwh> as the default rather
<andrewrk> jwh, if you don't mind, what does this command do on your system? `c++ -print-file-name=libstdc++.a`
<andrewrk> where "c++" is whatever c++ compiler you use to build zig
<jwh> abyss-amd64 [~/m/devel/llvm]# clang++ -print-file-name=libstdc++.a
<jwh> libstdc++.a
<jwh> :(
<andrewrk> that's actually the "we don't have that file" output