(_dl_lookup_versioned_symbol): Be prepared for empty string as

`reference_name' parameter.

diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c
index 2ec7e3a..ef34479 100644 (file)
--- a/elf/dl-lookup.c
+++ b/elf/dl-lookup.c
@@ -279,6 +279,7 @@ _dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref,
                             const struct r_found_version *version,
                             int reloc_type)
 {
+  extern char **_dl_argv;
   const unsigned long int hash = _dl_elf_hash (undef_name);
   struct sym_val current_value = { 0, NULL };
   struct link_map **scope;
@@ -295,7 +296,9 @@ _dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref,
       if (res < 0)
        /* Oh, oh.  The file named in the relocation entry does not
           contain the needed symbol.  */
-       _dl_signal_error (0, reference_name,
+       _dl_signal_error (0, (*reference_name
+                             ? reference_name
+                             : (_dl_argv[0] ?: "<main program>")),
                          make_string ("symbol ", undef_name, ", version ",
                                       version->name,
                                       " not defined in file ",