Changes to VT:

- fixed compiler warnings if using non-GNU compiler, respectively if _FORTIFY_SOURCE is 0 or not defined

This commit was SVN r26016.

ompi/contrib/vt/vt/config/m4/acinclude.iowrap.m4

@@ -10,8 +10,8 @@ AC_DEFUN([ACVT_IOWRAP],
 	[
 		sav_CPPFLAGS=$CPPFLAGS
 		CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE -D_LARGEFILE64_SOURCE"
+
 		AC_CHECK_FUNCS([ \
-			__fprintf_chk \
 			creat64 \
 			fopen64 \
 			fseeko \
@@ -29,6 +29,15 @@ AC_DEFUN([ACVT_IOWRAP],
 			fsync \
 			fdatasync \
 			lockf])
+
+		AC_CHECK_FUNCS([__fprintf_chk],
+		[
+dnl			Check whether <stdio.h> declares __vfprintf_chk. This should be the case if
+dnl			_FORTIFY_SOURCE is defined (default when using the GNU compiler).
+dnl			Otherwise, we have to declare this function to avoid compiler warnings.
+			AC_CHECK_DECLS([__vfprintf_chk], [], [], [#include <stdio.h>])
+		])
+
 		CPPFLAGS=$sav_CPPFLAGS
 
 		have_iowrap="yes"

ompi/contrib/vt/vt/vtlib/vt_iowrap.c

@@ -1422,6 +1422,9 @@ int fscanf(FILE *stream, const char *format, ...)
 
 
 #if defined(HAVE___FPRINTF_CHK) && HAVE___FPRINTF_CHK
+#if !(defined(HAVE_DECL___VFPRINTF_CHK) && HAVE_DECL___VFPRINTF_CHK)
+extern int __vfprintf_chk(FILE *stream, int flag, const char *format, va_list ap);
+#endif /* HAVE_DECL___VFPRINTF_CHK */
 int __fprintf_chk(FILE *stream, int flag, const char *format, ...)
 #else /* HAVE___FPRINTF_CHK */
 int fprintf(FILE *stream, const char *format, ...)