* elf/dl-lookup.c (dl_new_hash): New functions. cvs/fedora-glibc-20060710T2206

	(_dl_lookup_symbol_x): Rename hash to old_hash and don't compute
	value here.  Compute new-style hash value.  Pass new hash value
	and reference to variable with the old value to do_lookup_x.
	(_dl_setup_hash): If DT_GNU_HASH is defined, use it and not
	old-style hash table.
	(_dl_debug_bindings): Pass new hash value and reference to variable
	with the old value to do_lookup_x.
	* elf/do-lookup.h (do_lookup_x): Accept additional parameter with
	new-style hash value and change old-style hash value parameter to
	be a reference.  Reoganize functions to determine whether
	new-style hash table is available.  Only fall back on old-style
	table.  If old-style hash value is needed, compute it here.
	* elf/dynamic-link.h (elf_get_dynamic_info): Relocate DT_GNU_HASH
	entry.
	* elf/elf.h: Define SHT_GNU_HASH, DT_GNU_HASH, DT_TLSDEC_PLT,
	DT_TLSDEC_GOT.  Adjust DT_ADDRNUM.
	* include/link.h (struct link_map): Add l_gnu_bitmask_idxbits,
	l_gnu_shift, l_gnu_bitmask, l_gnu_buckets and l_gnu_chain_zero.
	* Makeconfig: If linker supports --hash-style option add it to all
	linker command lines to build DSOs.
	* config.make.in: Define have-hash-style.
	* configure.in: Test whether linker supports --hash-style option.

	* elf/dl-misc.c (_dl_name_match_p): Make MAP parameter const.
	* sysdeps/generic/ldsodefs.h: Adjust prototype.

1 files changed, 16 insertions, 0 deletions

diff --git a/configure.in b/configure.in
index 79fa32ec2b..924b0406cb 100644
--- a/configure.in
+++ b/configure.in
@@ -1589,6 +1589,22 @@ EOF
   rm -f conftest*])
 
   AC_SUBST(libc_cv_fpie)
+
+  AC_CACHE_CHECK(for --hash-style option,
+		 libc_cv_hashstyle, [dnl
+  cat > conftest.c <<EOF
+int _start (void) { return 42; }
+EOF
+  if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
+			      -fPIC -shared -o conftest.so conftest.c
+			      -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
+  then
+    libc_cv_hashstyle=yes
+  else
+    libc_cv_hashstyle=no
+  fi
+  rm -f conftest*])
+  AC_SUBST(libc_cv_hashstyle)
 fi
 
 AC_CACHE_CHECK(for -fno-toplevel-reorder, libc_cv_fno_toplevel_reorder, [dnl