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-rw-r--r--generic/tclMain.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/generic/tclMain.c b/generic/tclMain.c
index faea75a..c2300c2 100644
--- a/generic/tclMain.c
+++ b/generic/tclMain.c
@@ -47,7 +47,7 @@
* we have to translate that to strcmp here.
*/
-#ifndef __WIN32__
+#ifndef _WIN32
# define TCHAR char
# define TEXT(arg) arg
# define _tcscmp strcmp
@@ -80,7 +80,10 @@ NewNativeObj(
* source directory to make their own modified versions).
*/
+#if defined _MSC_VER && _MSC_VER < 1900
+/* isatty is always defined on MSVC 14.0, but not necessarily as CRTIMPORT. */
extern CRTIMPORT int isatty(int fd);
+#endif
/*
* The thread-local variables for this file's functions.