Don't create unnecessary output sections.

	* ldlang.c (out_bfd_get_section_by_name): Remove.
	(wild_section): Call bfd_get_section_by_name rather than
	our_bfd_get_section_by_name.  Don't call wild_doit if there is no
	section.
	(lang_create_output_section_statements): Remove.
	(map_input_to_output_sections): For several cases, call init_os if
	it has not already been called.
	(lang_size_sections): If output section was not created, skip it.
	(lang_process): Don't call lan_create_output_section_statements.
	(lang_place_orphans): Skip files with just_syms_flags set to true.
	* ld.texinfo: Document change.

3 files changed, 72 insertions, 57 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index b0e5519..d37570a 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,18 @@
+Wed May 11 16:24:19 1994  Ian Lance Taylor  (ian@tweedledumb.cygnus.com)
+
+	Don't create unnecessary output sections.
+	* ldlang.c (out_bfd_get_section_by_name): Remove.
+	(wild_section): Call bfd_get_section_by_name rather than
+	our_bfd_get_section_by_name.  Don't call wild_doit if there is no
+	section.
+	(lang_create_output_section_statements): Remove.
+	(map_input_to_output_sections): For several cases, call init_os if
+	it has not already been called.
+	(lang_size_sections): If output section was not created, skip it.
+	(lang_process): Don't call lan_create_output_section_statements.
+	(lang_place_orphans): Skip files with just_syms_flags set to true.
+	* ld.texinfo: Document change.
+
 Tue May 10 14:31:16 1994  Ian Lance Taylor  (ian@tweedledumb.cygnus.com)
 
 	* ldlang.c (wild_doit): Don't bother initializing the vma and
diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index d2714c0..65a9d10 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -9,7 +9,7 @@
 @ifinfo
 @format
 START-INFO-DIR-ENTRY
-* Ld::                          The GNU linker.
+* Ld: (ld).                       The GNU linker.
 END-INFO-DIR-ENTRY
 @end format
 @end ifinfo
@@ -98,6 +98,9 @@ This file documents the GNU linker ld.
 @ifset H8300
 * H8/300::                      ld and the H8/300
 @end ifset
+@ifset Hitachi
+* Hitachi::                     ld and other Hitachi micros
+@end ifset
 @ifset I960
 * i960::                        ld and the Intel 960 family
 @end ifset
@@ -1432,6 +1435,15 @@ sequence of characters, but any name which does not conform to the standard
 @code{ld} symbol name syntax must be quoted.
 @xref{Symbols, , Symbol Names}.
 
+The linker will not create output sections which do not have any
+contents.  This is for convenience when referring to input sections that
+may or may not exist.  For example,
+@example
+.foo @{ *(.foo @}
+@end example
+will only create a @samp{.foo} section in the output file if there is a
+@samp{.foo} section in at least one input file.
+
 @node Section Placement
 @subsection Section Placement
 
@@ -1713,7 +1725,7 @@ optional portions:
 SECTIONS @{
 @dots{}
 @var{secname} @var{start} BLOCK(@var{align}) (NOLOAD) : AT ( @var{ldadr} )
-  @{ @var{contents} @} =@var{fill} >@var{region}
+  @{ @var{contents} @} >@var{region} =@var{fill}
 @dots{}
 @}
 @end smallexample
@@ -1722,7 +1734,7 @@ SECTIONS @{
 Definition}, and @pxref{Section Placement} for details on
 @var{contents}.  The remaining elements---@var{start},
 @code{BLOCK(@var{align)}}, @code{(NOLOAD)}, @code{AT ( @var{ldadr} )},
-@code{=@var{fill}}, and @code{>@var{region}}---are all optional.
+@code{>@var{region}}, and @code{=@var{fill}}---are all optional.
 
 @table @code
 @cindex start address, section
@@ -1816,6 +1828,13 @@ for (dst = _bstart; dst< _bend; dst++)
   *dst = 0;
 @end smallexample
 
+@kindex >@var{region}
+@cindex section, assigning to memory region
+@cindex memory regions and sections
+@item >@var{region}
+Assign this section to a previously defined region of memory.  
+@xref{MEMORY}.
+
 @kindex =@var{fill}
 @cindex section fill pattern
 @cindex fill pattern, entire section
@@ -1828,13 +1847,6 @@ significant bytes of the value, repeated as necessary.  You can also
 change the fill value with a @code{FILL} statement in the @var{contents}
 of a section definition.
 
-@kindex >@var{region}
-@cindex section, assigning to memory region
-@cindex memory regions and sections
-@item >@var{region}
-Assign this section to a previously defined region of memory.  
-@xref{MEMORY}.
-
 @end table
 
 @node Entry Point
@@ -2072,6 +2084,19 @@ top page of memory).
 @end ifclear
 @end ifset
 
+@ifclear GENERIC
+@ifset Hitachi
+@c This stuff is pointless to say unless you're especially concerned
+@c with Hitachi chips; don't enable it for generic case, please.
+@node Hitachi
+@chapter @code{ld} and other Hitachi chips
+
+@code{ld} also supports the H8/300H, the H8/500, and the Hitachi SH.  No
+special features, commands, or command-line options are required for
+these chips.
+@end ifset
+@end ifclear
+
 @ifset I960
 @ifclear GENERIC
 @raisesections
diff --git a/ld/ldlang.c b/ld/ldlang.c
index c001dd9..98a0e8d 100644
--- a/ld/ldlang.c
+++ b/ld/ldlang.c
@@ -81,8 +81,6 @@ static void wild_doit PARAMS ((lang_statement_list_type *ptr,
 			       asection *section,
 			       lang_output_section_statement_type *output,
 			       lang_input_statement_type *file));
-static asection *our_bfd_get_section_by_name PARAMS ((bfd *abfd,
-						      const char *section));
 static void wild_section PARAMS ((lang_wild_statement_type *ptr,
 				  const char *section,
 				  lang_input_statement_type *file,
@@ -98,7 +96,6 @@ static void ldlang_open_output PARAMS ((lang_statement_union_type *statement));
 static void open_input_bfds PARAMS ((lang_statement_union_type *statement));
 static void lang_reasonable_defaults PARAMS ((void));
 static void lang_place_undefineds PARAMS ((void));
-static void lang_create_output_section_statements PARAMS ((void));
 static void map_input_to_output_sections
   PARAMS ((lang_statement_union_type *s,
 	   const char *target,
@@ -701,14 +698,6 @@ wild_doit (ptr, section, output, file)
   }
 }
 
-static asection *
-our_bfd_get_section_by_name (abfd, section)
-     bfd * abfd;
-     CONST char *section;
-{
-  return bfd_get_section_by_name (abfd, section);
-}
-
 static void
 wild_section (ptr, section, file, output)
      lang_wild_statement_type * ptr;
@@ -723,21 +712,21 @@ wild_section (ptr, section, file, output)
       if (section == (char *) NULL)
 	{
 	  /* Do the creation to all sections in the file */
-	  for (s = file->the_bfd->sections; s != (asection *) NULL; s = s->next)
-	  {
-	    /* except for bss */
-	    if ((s->flags & SEC_IS_COMMON)  == 0)
+	  for (s = file->the_bfd->sections; s != NULL; s = s->next)
 	    {
-	      wild_doit (&ptr->children, s, output, file);
+	      /* except for bss */
+	      if ((s->flags & SEC_IS_COMMON)  == 0)
+		{
+		  wild_doit (&ptr->children, s, output, file);
+		}
 	    }
-	  }
 	}
       else
 	{
 	  /* Do the creation to the named section only */
-	  wild_doit (&ptr->children,
-		     our_bfd_get_section_by_name (file->the_bfd, section),
-		     output, file);
+	  s = bfd_get_section_by_name (file->the_bfd, section);
+	  if (s != NULL)
+	    wild_doit (&ptr->children, s, output, file);
 	}
     }
 }
@@ -1038,27 +1027,6 @@ lang_place_undefineds ()
     }
 }
 
-/* Copy important data from out internal form to the bfd way. Also
-   create a section for the dummy file
- */
-
-static void
-lang_create_output_section_statements ()
-{
-  lang_statement_union_type *os;
-
-  for (os = lang_output_section_statement.head;
-       os != (lang_statement_union_type *) NULL;
-       os = os->output_section_statement.next)
-    {
-      lang_output_section_statement_type *s =
-      &os->output_section_statement;
-
-      init_os (s);
-    }
-
-}
-
 /* Open input files and attatch to output sections */
 static void
 map_input_to_output_sections (s, target, output_section_statement)
@@ -1100,6 +1068,10 @@ map_input_to_output_sections (s, target, output_section_statement)
 	case lang_reloc_statement_enum:
 	case lang_assignment_statement_enum:
 	case lang_padding_statement_enum:
+	case lang_input_statement_enum:
+	  if (output_section_statement != NULL
+	      && output_section_statement->bfd_section == NULL)
+	    init_os (output_section_statement);
 	  break;
 	case lang_afile_asection_pair_statement_enum:
 	  FAIL ();
@@ -1119,9 +1091,6 @@ map_input_to_output_sections (s, target, output_section_statement)
 	      }
 	  }
 	  break;
-	case lang_input_statement_enum:
-	  /* A standard input statement, has no wildcards */
-	  break;
 	}
     }
 }
@@ -1639,6 +1608,12 @@ lang_size_sections (s, output_section_statement, prev, fill, dot, relax)
        bfd_vma after;
        lang_output_section_statement_type *os = &s->output_section_statement;
 
+       if (os->bfd_section == NULL)
+	 {
+	   /* This section was never actually created.  */
+	   break;
+	 }
+
        /* If this is a COFF shared library section, use the size and
 	  address from the input section.  FIXME: This is COFF
 	  specific; it would be cleaner if there were some other way
@@ -2256,6 +2231,9 @@ lang_place_orphans ()
     {
       asection *s;
 
+      if (file->just_syms_flag)
+	continue;
+
       for (s = file->the_bfd->sections;
 	   s != (asection *) NULL;
 	   s = s->next)
@@ -2516,9 +2494,6 @@ lang_process ()
   current_target = default_target;
 
   lang_for_each_statement (ldlang_open_output);	/* Open the output file */
-  /* For each output section statement, create a section in the output
-     file */
-  lang_create_output_section_statements ();
 
   ldemul_create_output_section_statements ();