Add support for VS2015 (VC++ 14.0)

Due to the rewritten CRT in this version of Visual C++ it is no longer
possible (or at least not at all easy) to make use of the ioinfo struct,
which commit b47a847f62 (re-)introduced in order to fix RT#120091/118059.
Therefore, we effectively revert commit b47a847f62 for VS2015 onwards on
the basis that being able to build with VS2015 onwards is more important
than the RT#120091/118059 bug fix. This does unfortunately mean that perls
built with <=VS2013 will not be compatible with perls built with >=VS2015,
but they may well not have been compatible anyway because of the CRT
rewrite, and certainly wouldn't be compatible if perl builds with VS2015
were not supported!

See RT#125714 for more discussion about this.

1 files changed, 1 insertions, 1 deletions

diff --git a/perlio.c b/perlio.c
index 79cdc2700d..3e936a26d0 100644
--- a/perlio.c
+++ b/perlio.c
@@ -3231,7 +3231,7 @@ PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
        structure at all
      */
 #    else
-    f->_file = -1;
+    PERLIO_FILE_file(f) = -1;
 #    endif
     return 1;
 #  else