The dmd front-end function FileName::canonicalName could be called
during the semantic pass of import("file") expressions, so still
requires that realpath() be redefined.
Initial patch by Rainer Orth.
gcc/d/ChangeLog:
2019-03-12 Iain Buclaw <ibuclaw@gdcproject.org>
PR d/87866
* d-system.h (realpath): Redefine as lrealpath.
From-SVN: r269619
