Tue Mar 12 12:43:59 1996 David Mosberger-Tang <davidm@koala.azstarnet.com>
* ld.h (ld_config_type): Add warn_multiple_gp field. * lexsup.c (parse_args): Handle --warn-multiple-gp. * ldmain.c (warning_callback): Suppress multiple gp values warning if --warn_multiple_gp was not used. * ld.texinfo, ld.1: Document --warn-multiple-gp.
This commit is contained in:
Ian Lance Taylor
parent
a10d3dec45
commit
4b7d2399ae
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@ -1,3 +1,11 @@
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Tue Mar 12 12:43:59 1996 David Mosberger-Tang <davidm@koala.azstarnet.com>
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* ld.h (ld_config_type): Add warn_multiple_gp field.
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* lexsup.c (parse_args): Handle --warn-multiple-gp.
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* ldmain.c (warning_callback): Suppress multiple gp values warning
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if --warn_multiple_gp was not used.
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* ld.texinfo, ld.1: Document --warn-multiple-gp.
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Tue Mar 12 12:02:21 1996 Ian Lance Taylor <ian@cygnus.com>
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* configure: Rebuild with autoconf 2.8.
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6
ld/ld.1
6
ld/ld.1
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@ -119,6 +119,7 @@ ld \- the GNU linker
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.RB "[\|" \-\-version "\|]"
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.RB "[\|" \-warn\-common "\|]"
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.RB "[\|" \-warn\-constructors "\|]"
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.RB "[\|" \-warn\-multiple\-gp "\|]"
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.RB "[\|" \-warn\-once "\|]"
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.RB "[\|" \-\-whole\-archive "\|]"
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.RB "[\|" \-\-no\-whole\-archive "\|]"
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@ -907,6 +908,11 @@ Warn if any global constructors are used. This is only useful for a
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few object file formats. For formats like COFF or ELF, the linker can
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not detect the use of global constructors.
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.TP
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.B \-warn\-multiple\-gp
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Warn if the output file requires multiple global-pointer values. This
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option is only meaningful for certain processors, such as the Alpha.
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.TP
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.B \-warn\-once
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Only warn once for each undefined symbol, rather than once per module
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@ -184,7 +184,7 @@ ld [ -o @var{output} ] @var{objfile}@dots{}
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[ -Ttext @var{org} ] [ -Tdata @var{org} ]
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[ -Tbss @var{org} ] [ -t ] [ -traditional-format ]
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[ -u @var{symbol}] [-V] [-v] [ -verbose] [ -version ]
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[ -warn-common ] [ -warn-constructors] [ -warn-once ]
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[ -warn-common ] [ -warn-constructors] [ -warn-multiple-gp ] [ -warn-once ]
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[ -y @var{symbol} ] [ -X ] [-x ]
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[ -( [ archives ] -) ]
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[ --start-group [ archives ] --end-group ]
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@ -932,6 +932,20 @@ Warn if any global constructors are used. This is only useful for a few
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object file formats. For formats like COFF or ELF, the linker can not
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detect the use of global constructors.
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@kindex -warn-multiple-gp
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@item -warn-multiple-gp
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Warn if multiple global pointer values are required in the output file.
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This is only meaningful for certain processors, such as the Alpha.
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Specifically, some processors put large-valued constants in a special
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section. A special register (the global pointer) points into the middle
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of this section, so that constants can be loaded efficiently via a
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base-register relative addressing mode. Since the offset in
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base-register relative mode is fixed and relatively small (e.g., 16
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bits), this limits the maximum size of the constant pool. Thus, in
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large programs, it is often necessary to use multiple global pointer
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values in order to be able to address all possible constants. This
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option causes a warning to be issued whenever this case occurs.
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@kindex -warn-once
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@cindex warnings, on undefined symbols
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@cindex undefined symbols, warnings on
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@ -941,6 +955,7 @@ which refers to it.
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@kindex --whole-archive
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@cindex including an entire archive
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@item --whole-archive
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For each archive mentioned on the command line after the
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@code{--whole-archive} option, include every object file in the archive
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in the link, rather than searching the archive for the required object
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@ -949,6 +964,7 @@ library, forcing every object to be included in the resulting shared
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library.
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@kindex --no-whole-archive
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@item --no-whole-archive
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Turn off the effect of the @code{--whole-archive} option for archives
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which appear later on the command line.
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14
ld/ldmain.c
14
ld/ldmain.c
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@ -735,7 +735,7 @@ add_to_set (info, h, reloc, abfd, section, value)
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if (! config.build_constructors)
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return true;
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ldctor_add_set_entry (h, reloc, section, value);
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ldctor_add_set_entry (h, reloc, (const char *) NULL, section, value);
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if (h->type == bfd_link_hash_new)
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{
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@ -775,7 +775,9 @@ constructor_callback (info, constructor, name, abfd, section, value)
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/* Ensure that BFD_RELOC_CTOR exists now, so that we can give a
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useful error message. */
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if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL)
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if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL
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&& (link_info.relocateable
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|| bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL))
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einfo ("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n");
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s = set_name;
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@ -802,7 +804,7 @@ constructor_callback (info, constructor, name, abfd, section, value)
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ourselves. */
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}
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ldctor_add_set_entry (h, BFD_RELOC_CTOR, section, value);
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ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value);
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return true;
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}
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@ -829,6 +831,12 @@ warning_callback (info, warning, symbol, abfd, section, address)
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asection *section;
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bfd_vma address;
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{
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/* This is a hack to support warn_multiple_gp. FIXME: This should
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have a cleaner interface, but what? */
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if (! config.warn_multiple_gp
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&& strcmp (warning, "using multiple gp values") == 0)
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return true;
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if (section != NULL)
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einfo ("%C: %s\n", abfd, section, address, warning);
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else if (abfd == NULL)
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@ -1,5 +1,5 @@
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/* Parse options for the GNU linker.
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Copyright (C) 1991, 92, 93, 94, 1995 Free Software Foundation, Inc.
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Copyright (C) 1991, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
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This file is part of GLD, the Gnu Linker.
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@ -103,7 +103,8 @@ parse_args (argc, argv)
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#define OPTION_VERSION (OPTION_VERBOSE + 1)
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#define OPTION_WARN_COMMON (OPTION_VERSION + 1)
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#define OPTION_WARN_CONSTRUCTORS (OPTION_WARN_COMMON + 1)
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#define OPTION_WARN_ONCE (OPTION_WARN_CONSTRUCTORS + 1)
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#define OPTION_WARN_MULTIPLE_GP (OPTION_WARN_CONSTRUCTORS + 1)
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#define OPTION_WARN_ONCE (OPTION_WARN_MULTIPLE_GP + 1)
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#define OPTION_SPLIT_BY_RELOC (OPTION_WARN_ONCE + 1)
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#define OPTION_SPLIT_BY_FILE (OPTION_SPLIT_BY_RELOC + 1)
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#define OPTION_WHOLE_ARCHIVE (OPTION_SPLIT_BY_FILE + 1)
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@ -159,6 +160,7 @@ parse_args (argc, argv)
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{"version", no_argument, NULL, OPTION_VERSION},
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{"warn-common", no_argument, NULL, OPTION_WARN_COMMON},
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{"warn-constructors", no_argument, NULL, OPTION_WARN_CONSTRUCTORS},
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{"warn-multiple-gp", no_argument, NULL, OPTION_WARN_MULTIPLE_GP},
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{"warn-once", no_argument, NULL, OPTION_WARN_ONCE},
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{"split-by-reloc", required_argument, NULL, OPTION_SPLIT_BY_RELOC},
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{"split-by-file", no_argument, NULL, OPTION_SPLIT_BY_FILE},
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@ -487,6 +489,9 @@ parse_args (argc, argv)
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case OPTION_WARN_CONSTRUCTORS:
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config.warn_constructors = true;
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break;
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case OPTION_WARN_MULTIPLE_GP:
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config.warn_multiple_gp = true;
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break;
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case OPTION_WARN_ONCE:
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config.warn_once = true;
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break;
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