* ld.h (ld_config_type): Add new field warn_once.

[binutils.git] / ld / ldmain.c

diff --git a/ld/ldmain.c b/ld/ldmain.c
index 754813b0ea496634506fffa1cb1f34eae175d1bf..392d302588ce10a2178756be7c9894e7cf861790 100644 (file)
--- a/ld/ldmain.c
+++ b/ld/ldmain.c
@@ -782,6 +782,27 @@ undefined_symbol (info, name, abfd, section, address)
 
 #define MAX_ERRORS_IN_A_ROW 5
 
+  if (config.warn_once)
+    {
+      static struct bfd_hash_table *hash;
+
+      /* Only warn once about a particular undefined symbol.  */
+
+      if (hash == NULL)
+       {
+         hash = ((struct bfd_hash_table *)
+                 xmalloc (sizeof (struct bfd_hash_table)));
+         if (! bfd_hash_table_init (hash, bfd_hash_newfunc))
+           einfo ("%F%P: bfd_hash_table_init failed: %E\n");
+       }
+
+      if (bfd_hash_lookup (hash, name, false, false) != NULL)
+       return true;
+
+      if (bfd_hash_lookup (hash, name, true, true) == NULL)
+       einfo ("%F%P: bfd_hash_lookup failed: %E\n");
+    }
+
   /* We never print more than a reasonable number of errors in a row
      for a single symbol.  */
   if (error_name != (char *) NULL