Don't use __STDC__ on MS-Windows unless necessary (Bug #9066).

 nt/inc/ms-w32.h (__STDC__): Fiddle with value only for MSVC.

 src/w32term.c <input_signal_count>: Declare 'volatile' unconditionally.

2 files changed, 14 insertions, 1 deletions

diff --git a/nt/ChangeLog b/nt/ChangeLog
index 18911b90fac..81477e801d6 100644
--- a/nt/ChangeLog
+++ b/nt/ChangeLog
@@ -1,3 +1,8 @@
+2013-02-16  Eli Zaretskii  <eliz@gnu.org>
+
+        * inc/ms-w32.h (__STDC__): Fiddle with value only for MSVC.
+        (Bug#9066)
+
 2013-02-13  Juanma Barranquero  <lekktu@gmail.com>
 
         * config.nt: Sync with autogen/config.in.
diff --git a/nt/inc/ms-w32.h b/nt/inc/ms-w32.h
index a74c74b4548..5c3caeb38c9 100644
--- a/nt/inc/ms-w32.h
+++ b/nt/inc/ms-w32.h
@@ -265,8 +265,11 @@ struct timespec
 extern struct tm *gmtime_r (time_t const * restrict, struct tm * restrict);
 extern struct tm *localtime_r (time_t const * restrict, struct tm * restrict);
 
+#ifdef _MSC_VER
 /* This is hacky, but is necessary to avoid warnings about macro
-   redefinitions using the SDK compilers.  */
+   redefinitions using the MSVC compilers, since, when __STDC__ is
+   undefined or zero, those compilers declare functions like fileno,
+   lseek, and chdir, for which we defined macros above.  */
 #ifndef __STDC__
 #define __STDC__ 1
 #define MUST_UNDEF__STDC__
@@ -278,6 +281,11 @@ extern struct tm *localtime_r (time_t const * restrict, struct tm * restrict);
 #undef __STDC__
 #undef MUST_UNDEF__STDC__
 #endif
+#else  /* !_MSC_VER */
+#include <direct.h>
+#include <io.h>
+#include <stdio.h>
+#endif  /* !_MSC_VER */
 
 /* Defines that we need that aren't in the standard signal.h.  */
 #define SIGHUP  1               /* Hang up */