X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=acinclude.m4;h=0af7fd0fc9ec7aaae5ee7dbfcfbf329123e245f7;hb=7507ec485f72c2ec56731ee5c9790a20d6d694fd;hp=f1322fa0e125532556b8fc9e037d0becd5b3918e;hpb=0f9fc40325e390f23ef46cb2b3588da6b97ad5b1;p=sliver-openvswitch.git

diff --git a/acinclude.m4 b/acinclude.m4
index f1322fa0e..0af7fd0fc 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -108,21 +108,26 @@ dnl
 dnl Greps FILE for REGEX.  If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
 AC_DEFUN([OVS_GREP_IFELSE], [
   AC_MSG_CHECKING([whether $2 matches in $1])
-  grep '$2' $1 >/dev/null 2>&1
-  status=$?
-  case $status in
-    0) 
-      AC_MSG_RESULT([yes])
-      $3
-      ;;
-    1) 
-      AC_MSG_RESULT([no])
-      $4
-      ;;
-    *) 
-      AC_MSG_ERROR([grep exited with status $status]) 
-      ;;
-  esac
+  if test -f $1; then
+    grep '$2' $1 >/dev/null 2>&1
+    status=$?
+    case $status in
+      0) 
+        AC_MSG_RESULT([yes])
+        $3
+        ;;
+      1) 
+        AC_MSG_RESULT([no])
+        $4
+        ;;
+      *) 
+        AC_MSG_ERROR([grep exited with status $status])
+        ;;
+    esac
+  else
+    AC_MSG_RESULT([file not found])
+    $4
+  fi
 ])
 
 dnl OVS_DEFINE(NAME)