* emultempl/elf32.em (OPTION_GROUP): New macro.

Add new option Bgroup to longopts.
	(gld*_parse_args): Handle GROUP_OPTION and recognize -z defs.
	(gld*_list_options): Add -Bgroup and -z defs.
	* ld.1: Document -Bgroup and -z defs.
	* ld.texinfo: Likewise.

ld/ChangeLog

@@ -1,3 +1,12 @@
+2001-03-17  Ulrich Drepper  <drepper@redhat.com>
+
+	* emultempl/elf32.em (OPTION_GROUP): New macro.
+	Add new option Bgroup to longopts.
+	(gld*_parse_args): Handle GROUP_OPTION and recognize -z defs.
+	(gld*_list_options): Add -Bgroup and -z defs.
+	* ld.1: Document -Bgroup and -z defs.
+	* ld.texinfo: Likewise.
+
 2001-03-07  Michael Meissner  <meissner@redhat.com>
 
 	* scripttempl/elfd10v.sc (.rodata,.rodata1,.data1,.sdata): Deal

ld/emultempl/elf32.em

@@ -1334,6 +1334,7 @@ cat >>e${EMULATION_NAME}.c <<EOF
 
 #define OPTION_DISABLE_NEW_DTAGS	(400)
 #define OPTION_ENABLE_NEW_DTAGS		(OPTION_DISABLE_NEW_DTAGS + 1)
+#define OPTION_GROUP			(OPTION_ENABLE_NEW_DTAGS + 1)
 
 static struct option longopts[] =
 {
@@ -1347,6 +1348,8 @@ cat >>e${EMULATION_NAME}.c <<EOF
   {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS},
   {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
   {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS},
+  {"Bgroup", no_argument, NULL, OPTION_GROUP},
+  {"Bgroup", no_argument, NULL, OPTION_GROUP},
 EOF
 fi
 
@@ -1405,6 +1408,12 @@ cat >>e${EMULATION_NAME}.c <<EOF
       link_info.new_dtags = true;
       break;
 
+    case OPTION_GROUP:
+      link_info.flags_1 |= (bfd_vma) DF_1_GROUP;
+      /* Groups must be self-contained.  */
+      link_info.no_undefined = true;
+      break;
+
     case 'z':
       if (strcmp (optarg, "initfirst") == 0)
 	link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST;
@@ -1430,6 +1439,8 @@ cat >>e${EMULATION_NAME}.c <<EOF
 	  link_info.flags |= (bfd_vma) DF_ORIGIN;
 	  link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN;
 	}
+      else if (strcmp (optarg, "defs") == 0)
+	link_info.no_undefined = true;
       /* What about the other Solaris -z options? FIXME.  */
       break;
 EOF
@@ -1463,8 +1474,10 @@ EOF
 
 if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
 cat >>e${EMULATION_NAME}.c <<EOF
+  fprintf (file, _("  -Bgroup\t\tSelects group name lookup rules for DSO\n"));
   fprintf (file, _("  --disable-new-dtags\tDisable new dynamic tags\n"));
   fprintf (file, _("  --enable-new-dtags\tEnable new dynamic tags\n"));
+  fprintf (file, _("  -z defs\t\tDisallows undefined symbols\n"));
   fprintf (file, _("  -z initfirst\t\tMark DSO to be initialized first at runtime\n"));
   fprintf (file, _("  -z interpose\t\tMark object to interpose all DSOs but executable\n"));
   fprintf (file, _("  -z loadfltr\t\tMark object requiring immediate process\n"));

ld/ld.1

@@ -29,6 +29,7 @@ ld \- the GNU linker
 .I input-format\c
 \&\|] 
 .RB "[\|" \-Bstatic "\|]"  
+.RB "[\|" \-Bgroup "\|]"  
 .RB "[\|" \-Bdynamic "\|]"  
 .RB "[\|" \-Bsymbolic "\|]"  
 .RB "[\|" "\-c\ "\c
@@ -406,6 +407,19 @@ Link against dynamic libraries.  This is only meaningful on platforms
 for which shared libraries are supported.  This option is normally the
 default on such platforms.
 
+.TP
+.B \-Bgroup
+Set the \c
+.B DF_1_GROUP
+\c
+flag in the \c
+.B DT_FLAGS_1
+\c
+entry in the dynamic section.  This causes the runtime linker to handle
+lookups in this object and its dependencies to be performed only inside
+the group.  No undefined symbols are allowed.  This option is only
+meaningful on ELF platforms which support shared libraries.
+
 .TP
 .B \-Bsymbolic
 When creating a shared library, bind references to global symbols to

ld/ld.texinfo

@@ -767,6 +767,7 @@ of this object will ignore any default library search paths.
 @code{nodump} marks the object can not be dumped by @code{dldump}.
 @code{now} marks the object with the non-lazy runtime binding.
 @code{origin} marks the object may contain $ORIGIN.
+@code{defs} disallows undefined symbols.
 
 @kindex -(
 @cindex groups of archives
@@ -805,6 +806,14 @@ for compatibility with various systems.  You may use this option
 multiple times on the command line: it affects library searching for
 @code{-l} options which follow it.
 
+@kindex -Bgroup
+@item -Bgroup
+Set the @code{DF_1_GROUP} flag in the @code{DT_FLAGS_1} entry in the dynamic
+section.  This causes the runtime linker to handle lookups in this
+object and its dependencies to be performed only inside the group.
+@code{--no-undefined} is implied.  This option is only meaningful on ELF
+platforms which support shared libraries.
+
 @kindex -Bstatic
 @kindex -dn
 @kindex -non_shared
@@ -945,9 +954,11 @@ necessary.  This may be required if @code{ld} runs out of memory space
 while linking a large executable.
 
 @kindex --no-undefined
+@kindex -z defs
 @item --no-undefined
+@itemx -z defs
 Normally when creating a non-symbolic shared library, undefined symbols
-are allowed and left to be resolved by the runtime loader.  This option
+are allowed and left to be resolved by the runtime loader.  These options
 disallows such undefined symbols.
 
 @kindex --allow-shlib-undefined
@@ -4899,5 +4910,3 @@ to permit their use in free software.
 
 @contents
 @bye
-
-