Allow "set sysroot" with no argument to restore sysroot to empty

[external/binutils.git] / gdb / solib.c

diff --git a/gdb/solib.c b/gdb/solib.c
index 8417f88..c8138ef 100644 (file)
--- a/gdb/solib.c
+++ b/gdb/solib.c
@@ -1590,16 +1590,16 @@ inferior.  Otherwise, symbols must be loaded manually, using \
                           show_auto_solib_add,
                           &setlist, &showlist);
 
-  add_setshow_filename_cmd ("sysroot", class_support,
-                           &gdb_sysroot, _("\
+  add_setshow_optional_filename_cmd ("sysroot", class_support,
+                                    &gdb_sysroot, _("\
 Set an alternate system root."), _("\
 Show the current system root."), _("\
 The system root is used to load absolute shared library symbol files.\n\
 For other (relative) files, you can add directories using\n\
 `set solib-search-path'."),
-                           reload_shared_libraries,
-                           NULL,
-                           &setlist, &showlist);
+                                    reload_shared_libraries,
+                                    NULL,
+                                    &setlist, &showlist);
 
   add_alias_cmd ("solib-absolute-prefix", "sysroot", class_support, 0,
                 &setlist);