[Issue 18312] string concatenation with -betterC fails with linker errors

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18312

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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                 CC|                            |bugzilla at digitalmars.com

--- Comment #5 from Walter Bright <bugzilla at digitalmars.com> ---
The example needs to declare main() as extern(C).

Anyhow, the trouble is _d_arraycatnTX(), which is in druntime and uses the GC
to allocate the destination array.

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