Display the reference causing a shared library to be needed

Adds a section for --as-needed libraries to a linker map file, similar
to what we do for archive libraries.

bfd/
	* elflink.c (elf_link_add_object_symbols): Call minfo for --as-needed.
ld/
	* ldlang.c (asneeded_list_head, asneeded_list_tail): New vars.
	(lang_init): Initialise them.
	(lang_print_asneeded): New function.
	(lang_process): Call lang_print_asneeded.
	* ldlang.h (struct asneeded_minfo): New.
	(asneeded_list_tail): Declare.
	* ldmain.c (add_archive_element): Improve archive map heading.
	* ldmisc.c (minfo): Stash --as-needed info.

1 files changed, 16 insertions, 1 deletions

diff --git a/ld/ldmisc.c b/ld/ldmisc.c
index 1b69ab1..cddcb18 100644
--- a/ld/ldmisc.c
+++ b/ld/ldmisc.c
@@ -484,7 +484,22 @@ minfo (const char *fmt, ...)
       va_list arg;
 
       va_start (arg, fmt);
-      vfinfo (config.map_file, fmt, arg, FALSE);
+      if (fmt[0] == '%' && fmt[1] == '!' && fmt[2] == 0)
+	{
+	  /* Stash info about --as-needed shared libraries.  Print
+	     later so they don't appear intermingled with archive
+	     library info.  */
+	  struct asneeded_minfo *m = xmalloc (sizeof *m);
+
+	  m->next = NULL;
+	  m->soname = va_arg (arg, const char *);
+	  m->ref = va_arg (arg, bfd *);
+	  m->name = va_arg (arg, const char *);
+	  *asneeded_list_tail = m;
+	  asneeded_list_tail = &m->next;
+	}
+      else
+	vfinfo (config.map_file, fmt, arg, FALSE);
       va_end (arg);
     }
 }