2004-11-18  Andrew Cagney  <cagney@gnu.org>

        * dwarf2read.c: Include "top.c".

        (dwarf2_has_info): Check for readnever_symbol_files.

        * symfile.c (readnever_symbol_files): Define.

        * top.h (readnever_symbol_files): Declare.

        * main.c (captured_main): Add --readnever option.

        (print_gdb_help): Ditto.

2004-11-18  Andrew Cagney  <cagney@gnu.org>

        * gdb.texinfo (File Options): Document --readnever.

Index: gdb-7.99.90.20170420/gdb/doc/gdb.texinfo

===================================================================

--- gdb-7.99.90.20170420.orig/gdb/doc/gdb.texinfo	2017-04-20 22:29:39.179740076 +0200

+++ gdb-7.99.90.20170420/gdb/doc/gdb.texinfo	2017-04-20 22:29:40.924751096 +0200

@@ -1037,6 +1037,12 @@

 the default, which is to read it incrementally as it is needed.

 This makes startup slower, but makes future operations faster.

+@item --readnever

+@cindex @code{--readnever}

+Do not read each symbol file's symbolic debug information.  This makes

+startup faster but at the expense of not being able to perform

+symbolic debugging.

+

 @end table

 @node Mode Options

Index: gdb-7.99.90.20170420/gdb/main.c

===================================================================

--- gdb-7.99.90.20170420.orig/gdb/main.c	2017-04-20 22:29:39.182740095 +0200

+++ gdb-7.99.90.20170420/gdb/main.c	2017-04-20 22:29:40.925751103 +0200

@@ -615,6 +615,7 @@

       {"tui", no_argument, 0, OPT_TUI},

       {"dbx", no_argument, &dbx_commands, 1},

       {"readnow", no_argument, &readnow_symbol_files, 1},

+      {"readnever", no_argument, &readnever_symbol_files, 1},

       {"r", no_argument, &readnow_symbol_files, 1},

       {"quiet", no_argument, &quiet, 1},

       {"q", no_argument, &quiet, 1},

@@ -1254,6 +1255,7 @@

   --se=FILE          Use FILE as symbol file and executable file.\n\

   --symbols=SYMFILE  Read symbols from SYMFILE.\n\

   --readnow          Fully read symbol files on first access.\n\

+  --readnever        Do not read symbol files.\n\

   --write            Set writing into executable and core files.\n\n\

 "), stream);

   fputs_unfiltered (_("\

Index: gdb-7.99.90.20170420/gdb/symfile.c

===================================================================

--- gdb-7.99.90.20170420.orig/gdb/symfile.c	2017-04-20 22:29:39.183740101 +0200

+++ gdb-7.99.90.20170420/gdb/symfile.c	2017-04-20 22:29:40.926751109 +0200

@@ -79,6 +79,7 @@

 /* Global variables owned by this file.  */

 int readnow_symbol_files;	/* Read full symbols immediately.  */

+int readnever_symbol_files;	/* Never read full symbols.  */

 /* Functions this file defines.  */

Index: gdb-7.99.90.20170420/gdb/dwarf2read.c

===================================================================

--- gdb-7.99.90.20170420.orig/gdb/dwarf2read.c	2017-04-20 22:29:39.190740145 +0200

+++ gdb-7.99.90.20170420/gdb/dwarf2read.c	2017-04-20 22:29:57.973858766 +0200

@@ -73,6 +73,7 @@

 #include "common/function-view.h"

 #include "common/gdb_optional.h"

 #include "common/underlying.h"

+#include "top.h"

 #include <fcntl.h>

 #include <sys/types.h>

@@ -2208,7 +2209,8 @@

                              (void *) names);

       dwarf2_per_objfile->objfile = objfile;

     }

-  return (!dwarf2_per_objfile->info.is_virtual

+  return !readnever_symbol_files &&

+	 (!dwarf2_per_objfile->info.is_virtual

 	  && dwarf2_per_objfile->info.s.section != NULL

 	  && !dwarf2_per_objfile->abbrev.is_virtual

 	  && dwarf2_per_objfile->abbrev.s.section != NULL);

Index: gdb-7.99.90.20170420/gdb/top.h

===================================================================

--- gdb-7.99.90.20170420.orig/gdb/top.h	2017-04-20 22:29:39.191740152 +0200

+++ gdb-7.99.90.20170420/gdb/top.h	2017-04-20 22:29:40.932751147 +0200

@@ -269,6 +269,7 @@

 /* From random places.  */

 extern int readnow_symbol_files;

+extern int readnever_symbol_files;

 /* Perform _initialize initialization.  */

 extern void gdb_init (char *);