[Issue 18193] module config is in file 'rt/config.d' which cannot be read

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18193

--- Comment #2 from github-bugzilla at puremagic.com ---
Commits pushed to stable at https://github.com/dlang/druntime

https://github.com/dlang/druntime/commit/10afa6944bb3ac479cbcabc5499a86136907b95f
Fix issue 18193 - module config is in file 'rt/config.d' which cannot be read
(edit)

src/rt isn't shipped with druntime's imports, so it can't be
imported directly from core.runtime. This PR fixes importing rt.config
from a public druntime module by replacing it with an extern
definition.

To reproduce the bug create a file that imports 'core.runtime' and
compile it with:
dmd -unittest -deps filename.d

The error is:
/usr/include/dmd/druntime/import/core/runtime.d(653): Error: module
config is in file 'rt/config.d' which cannot be read

https://github.com/dlang/druntime/commit/105d4a5ca279316665b3b796bf5ca7d249595caf
Add test to the bug 18193

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