diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 3f50b0c..a8a71da 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -3383,8 +3383,9 @@ else
   if test -n "$ac_tool_prefix" && test "$build" = "$host"; then
     lt_nm_to_check="$lt_nm_to_check nm"
   fi
+  lt_save_ifs=$IFS
   for lt_tmp_nm in $lt_nm_to_check; do
-    lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
+    IFS=$PATH_SEPARATOR
     for ac_dir in $PATH /usr/ccs/bin/elf /usr/ccs/bin /usr/ucb /bin; do
       IFS=$lt_save_ifs
       test -z "$ac_dir" && ac_dir=.
@@ -3397,13 +3398,13 @@ else
 	case `"$tmp_nm" -B /dev/null 2>&1 | sed '1q'` in
 	*/dev/null* | *'Invalid file or object type'*)
 	  lt_cv_path_NM="$tmp_nm -B"
-	  break
+	  break 2
 	  ;;
 	*)
 	  case `"$tmp_nm" -p /dev/null 2>&1 | sed '1q'` in
 	  */dev/null*)
 	    lt_cv_path_NM="$tmp_nm -p"
-	    break
+	    break 2
 	    ;;
 	  *)
 	    lt_cv_path_NM=${lt_cv_path_NM="$tmp_nm"} # keep the first match, but
@@ -3416,6 +3417,7 @@ else
     done
     IFS=$lt_save_ifs
   done
+  IFS=$lt_save_ifs
   : ${lt_cv_path_NM=no}
 fi])
 if test no != "$lt_cv_path_NM"; then