Add support for thin archives.

    * bfd/archive.c (_bfd_find_nested_archive): New function.
    (get_extended_arelt_filename): Add origin parameter.
    (_bfd_generic_read_ar_hdr_mag): Deal with extended name
    combined with a file offset.
    (append_relative_path): New function.
    (_bfd_get_elt_at_filepos): Deal with external members and
    nested archives.
    (bfd_generic_openr_next_archived_file): Thin archives.
    (bfd_generic_archive_p): Recognize new magic string.
    (adjust_relative_path): New function.
    (_bfd_construct_extended_name_table): Construct extended
    names for thin archive members.
    (_bfd_write_archive_contents): Emit new magic string, skip
    copying files for thin archives.
    * bfd/bfd-in.h (bfd_is_thin_archive): New macro.
    * bfd/bfd.c (struct bfd): New fields for thin archives.
    * bfd/libbfd-in.h (struct areltdata): New field for thin archives.
    * bfd/opncls.c (bfd_close): Delete BFDs for nested archives.
    * binutils/ar.c (make_thin_archive): New global flag.
    (map_over_members): Deal with full pathnames in thin archives.
    (usage, main): Add 'T' option for building thin archives.
    (replace_members): Pass thin archive flag to ar_emul_append.
    * binutils/arsup.c (ar_open): Initialize new flag.
    * binutils/binemul.c (ar_emul_append): Add new parameter for
    flattening nested archives.
    (do_ar_emul_default_append): New function.
    (ar_emul_default_append): Factored out recursive code.
    * binutils/binemul.h (ar_emul_default_append): Add new parameter.
    (struct bin_emulation_xfer_struct): New parameter for ar_append.
    * binutils/dlltool.c (gen_lib_file): Initialize thin archive flag.
    * binutils/emul_aix.c (ar_emul_aix_internal): Add new flatten
    parameter, currently unimplemented.
    All callers changed.
    * binutils/objcopy.c (copy_archive): Preserve thin archive flag.
    * binutils/doc/binutils.texi: Update ar documentation.
    * binutils/testsuite/binutils-all/ar.exp: Add thin archive tests.
    * include/aout/ar.h (ARMAGT): New magic string for thin archives.

1 files changed, 13 insertions, 0 deletions

diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index 4e13bef..88dc337 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -506,6 +506,7 @@ extern void warn_deprecated (const char *, const char *, int, const char *);
 #define bfd_applicable_section_flags(abfd) ((abfd)->xvec->section_flags)
 #define bfd_my_archive(abfd) ((abfd)->my_archive)
 #define bfd_has_map(abfd) ((abfd)->has_armap)
+#define bfd_is_thin_archive(abfd) ((abfd)->is_thin_archive)
 
 #define bfd_valid_reloc_types(abfd) ((abfd)->xvec->valid_reloc_types)
 #define bfd_usrdata(abfd) ((abfd)->usrdata)
@@ -4659,6 +4660,13 @@ struct bfd
      origin, with origin set to 0 for non archive files.  */
   ufile_ptr origin;
 
+  /* The origin in the archive of the proxy entry.  This will
+     normally be the same as origin, except for thin archives,
+     when it will contain the current offset of the proxy in the
+     thin archive rather than the offset of the bfd in its actual
+     container.  */
+  ufile_ptr proxy_origin;
+
   /* A hash table for section names.  */
   struct bfd_hash_table section_htab;
 
@@ -4692,6 +4700,8 @@ struct bfd
   struct bfd *my_archive;      /* The containing archive BFD.  */
   struct bfd *archive_next;    /* The next BFD in the archive.  */
   struct bfd *archive_head;    /* The first BFD in the archive.  */
+  struct bfd *nested_archives; /* List of nested archive in a flattened
+                                  thin archive.  */
 
   /* A chain of BFD structures involved in a link.  */
   struct bfd *link_next;
@@ -4774,6 +4784,9 @@ struct bfd
 
   /* Have archive map.  */
   unsigned int has_armap : 1;
+
+  /* Set if this is a thin archive.  */
+  unsigned int is_thin_archive : 1;
 };
 
 typedef enum bfd_error