add autoconf test for fscanf redirect

darshan-runtime/configure

@@ -4832,6 +4832,38 @@ fi
 # End of MPI-only checks
 #
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for fscanf redirect" >&5
+$as_echo_n "checking for fscanf redirect... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+    #include <stdio.h>
+
+int
+main ()
+{
+
+    int fscanf(FILE *stream, const char *format, ...) {return(0);}
+    int __isoc99_fscanf(FILE *stream, const char *format, ...) {return(0);}
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+$as_echo "#define HAVE_FSCANF_REDIRECT 1" >>confdefs.h
+
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+
 DARSHAN_VERSION="3.2.0-pre1"
 
 

darshan-runtime/configure.in

@@ -481,6 +481,21 @@ AS_IF([$CC -show foo.c -o foo >& /dev/null],
 # End of MPI-only checks
 #
 
+AC_MSG_CHECKING(for fscanf redirect)
+AC_TRY_COMPILE(
+    [
+    #include <stdio.h>
+    ],
+    [
+    int fscanf(FILE *stream, const char *format, ...) {return(0);}
+    int __isoc99_fscanf(FILE *stream, const char *format, ...) {return(0);}
+    ],
+    AC_MSG_RESULT(no),
+    AC_MSG_RESULT(yes)
+    AC_DEFINE(HAVE_FSCANF_REDIRECT, 1, Define if fscanf is redirected to another function)
+)
+
+
 DARSHAN_VERSION="AC_PACKAGE_VERSION"
 AC_SUBST(darshan_lib_path)
 AC_SUBST(darshan_share_path)

darshan-runtime/darshan-runtime-config.h.in

@@ -6,6 +6,9 @@
 /* Define if struct aiocb64 type is defined */
 #undef HAVE_AIOCB64
 
+/* Define if fscanf is redirected to another function */
+#undef HAVE_FSCANF_REDIRECT
+
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H