From e13629bc072285a3df8c99c5ae377601fa190043 Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Sat, 3 Jun 2006 02:45:26 +0000
Subject: 	* emultempl/elf32.em (global_found): Make it a pointer. 
 (stat_needed, try_needed): Adjust. 	(check_needed): Don't skip non-loaded
 as-needed entries.  Only 	consider entries with both filename and
 the_bfd non-null. 	(after_open): Try loading non-loaded as-needed libs to
 satisfy 	DT_NEEDED libs.

---
 ld/emultempl/elf32.em | 95 ++++++++++++++++++++++++++++-----------------------
 1 file changed, 52 insertions(+), 43 deletions(-)

(limited to 'ld/emultempl/elf32.em')

diff --git a/ld/emultempl/elf32.em b/ld/emultempl/elf32.em
index cafb6c5..19d98fe 100644
--- a/ld/emultempl/elf32.em
+++ b/ld/emultempl/elf32.em
@@ -148,7 +148,7 @@ cat >>e${EMULATION_NAME}.c <<EOF
 
 static struct bfd_link_needed_list *global_needed;
 static struct stat global_stat;
-static bfd_boolean global_found;
+static lang_input_statement_type *global_found;
 static struct bfd_link_needed_list *global_vercheck_needed;
 static bfd_boolean global_vercheck_failed;
 
@@ -229,12 +229,14 @@ gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
   const char *suffix;
   const char *soname;
 
-  if (global_found)
+  if (global_found != NULL)
     return;
   if (s->the_bfd == NULL)
     return;
-  if (s->as_needed
-      && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
+
+  /* If this input file was an as-needed entry, and wasn't found to be
+     needed at the stage it was linked, then don't say we have loaded it.  */
+  if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
     return;
 
   if (bfd_stat (s->the_bfd, &st) != 0)
@@ -254,7 +256,7 @@ gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)
       && st.st_ino == global_stat.st_ino
       && st.st_ino != 0)
     {
-      global_found = TRUE;
+      global_found = s;
       return;
     }
 
@@ -398,9 +400,9 @@ cat >>e${EMULATION_NAME}.c <<EOF
   if (trace_file_tries)
     info_msg (_("found %s at %s\n"), soname, name);
 
-  global_found = FALSE;
+  global_found = NULL;
   lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);
-  if (global_found)
+  if (global_found != NULL)
     {
       /* Return TRUE to indicate that we found the file, even though
 	 we aren't going to do anything with it.  */
@@ -569,7 +571,7 @@ gld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force)
 		  if (fread (b, 1, hdr.dirlistlen + 1, f) ==
 		      hdr.dirlistlen + 1)
 		    ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);
-		
+
 		  free (b);
 		}
 	    }
@@ -585,7 +587,7 @@ gld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force)
   needed.by = NULL;
   needed.name = name;
   return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,
-			       		     force);
+					     force);
 }
 EOF
     # FreeBSD
@@ -809,49 +811,45 @@ cat >>e${EMULATION_NAME}.c <<EOF
 static void
 gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)
 {
-  if (global_found)
+  const char *soname;
+
+  /* Stop looking if we've found a loaded lib.  */
+  if (global_found != NULL
+      && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
+	  & DYN_AS_NEEDED) == 0)
     return;
 
-  /* If this input file was an as-needed entry, and wasn't found to be
-     needed at the stage it was linked, then don't say we have loaded it.  */
-  if (s->as_needed
-      && (s->the_bfd == NULL
-	  || (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0))
+  if (s->filename == NULL || s->the_bfd == NULL)
+    return;
+
+  /* Don't look for a second non-loaded as-needed lib.  */
+  if (global_found != NULL
+      && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)
     return;
 
-  if (s->filename != NULL)
+  if (strcmp (s->filename, global_needed->name) == 0)
     {
-      const char *f;
+      global_found = s;
+      return;
+    }
 
-      if (strcmp (s->filename, global_needed->name) == 0)
+  if (s->search_dirs_flag)
+    {
+      const char *f = strrchr (s->filename, '/');
+      if (f != NULL
+	  && strcmp (f + 1, global_needed->name) == 0)
 	{
-	  global_found = TRUE;
+	  global_found = s;
 	  return;
 	}
-
-      if (s->search_dirs_flag)
-	{
-	  f = strrchr (s->filename, '/');
-	  if (f != NULL
-	      && strcmp (f + 1, global_needed->name) == 0)
-	    {
-	      global_found = TRUE;
-	      return;
-	    }
-	}
     }
 
-  if (s->the_bfd != NULL)
+  soname = bfd_elf_get_dt_soname (s->the_bfd);
+  if (soname != NULL
+      && strcmp (soname, global_needed->name) == 0)
     {
-      const char *soname;
-
-      soname = bfd_elf_get_dt_soname (s->the_bfd);
-      if (soname != NULL
-	  && strcmp (soname, global_needed->name) == 0)
-	{
-	  global_found = TRUE;
-	  return;
-	}
+      global_found = s;
+      return;
     }
 }
 
@@ -904,9 +902,11 @@ gld${EMULATION_NAME}_after_open (void)
 
       /* See if this file was included in the link explicitly.  */
       global_needed = l;
-      global_found = FALSE;
+      global_found = NULL;
       lang_for_each_input_file (gld${EMULATION_NAME}_check_needed);
-      if (global_found)
+      if (global_found != NULL
+	  && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)
+	      & DYN_AS_NEEDED) == 0)
 	continue;
 
       n.by = l->by;
@@ -915,6 +915,15 @@ gld${EMULATION_NAME}_after_open (void)
       if (trace_file_tries)
 	info_msg (_("%s needed by %B\n"), l->name, l->by);
 
+      /* As-needed libs specified on the command line (or linker script)
+	 take priority over libs found in search dirs.  */
+      if (global_found != NULL)
+	{
+	  nn.name = global_found->filename;
+	  if (gld${EMULATION_NAME}_try_needed (&nn, TRUE))
+	    continue;
+	}
+
       /* We need to find this file and include the symbol table.  We
 	 want to search for the file in the same way that the dynamic
 	 linker will search.  That means that we want to use
@@ -1725,7 +1734,7 @@ cat >>e${EMULATION_NAME}.c <<EOF
 #define OPTION_GROUP			(OPTION_ENABLE_NEW_DTAGS + 1)
 #define OPTION_EH_FRAME_HDR		(OPTION_GROUP + 1)
 #define OPTION_EXCLUDE_LIBS		(OPTION_EH_FRAME_HDR + 1)
-  
+
 static void
 gld${EMULATION_NAME}_add_options
   (int ns, char **shortopts, int nl, struct option **longopts,
-- 
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