mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-21 01:12:32 +08:00
4a43e768f1
* elf-bfd.h (struct elf_obj_tdata): Delete dt_soname field. Add
dyn_lib_class field. Rearrange for better packing.
(elf_dt_soname): Delete.
(elf_dyn_lib_class): Define.
* elf.c (bfd_elf_set_dt_needed_name): Update comment.
(bfd_elf_set_dt_needed_soname): Delete.
(bfd_elf_set_dyn_lib_class): New function.
* elflink.h (add_dt_needed_tag): New function. Split out from..
(elf_link_add_object_symbols): ..here. Rename "name" to "soname".
Use elf_dyn_lib_class to set dt_needed and add_needed. Move fallback
initialization of soname.
(elf_link_check_versioned_symbol): Test elf_dyn_lib_class instead of
elf_dt_soname.
* bfd-in.h (enum dynamic_lib_link_class): New.
(bfd_elf_set_dt_needed_soname): Delete.
(bfd_elf_set_dyn_lib_class): Declare.
* bfd-in2.h: Regenerate.
ld/
* ld.texinfo: Add --as-needed doco.
* ldmain.c (as_needed): New global var.
* ldmain.h (as_needed): Declare.
* lexsup.c (option_values): Add OPTION_AS_NEEDED and
OPTION_NO_AS_NEEDED.
(ld_options): Likewise.
(parse_args): Handle them.
* ldlang.h (lang_input_statement_type): Add as_needed field.
* ldlang.c (new_afile): Set p->as_needed.
* emultempl/elf32.em (gld${EMULATION_NAME}_load_symbols): New function.
(gld${EMULATION_NAME}_try_needed): Use bfd_elf_set_dyn_lib_class.
(ld_${EMULATION_NAME}_emulation): Set LDEMUL_RECOGNIZED_FILE entry.
* ldlang.c (open_input_bfds): Remove useless cast.
(lang_do_assignments_1): Likewise.
(lang_for_each_input_section): Delete.
|
||
|---|---|---|
| .. | ||
| emulparams | ||
| emultempl | ||
| po | ||
| scripttempl | ||
| testsuite | ||
| acinclude.m4 | ||
| aclocal.m4 | ||
| ChangeLog | ||
| ChangeLog-0001 | ||
| ChangeLog-0203 | ||
| ChangeLog-9197 | ||
| ChangeLog-9899 | ||
| config.in | ||
| configure | ||
| configure.host | ||
| configure.in | ||
| configure.tgt | ||
| deffile.h | ||
| deffilep.y | ||
| dep-in.sed | ||
| fdl.texi | ||
| gen-doc.texi | ||
| genscripts.sh | ||
| h8-doc.texi | ||
| ld.h | ||
| ld.texinfo | ||
| ldcref.c | ||
| ldctor.c | ||
| ldctor.h | ||
| ldemul.c | ||
| ldemul.h | ||
| ldexp.c | ||
| ldexp.h | ||
| ldfile.c | ||
| ldfile.h | ||
| ldgram.y | ||
| ldint.texinfo | ||
| ldlang.c | ||
| ldlang.h | ||
| ldlex.h | ||
| ldlex.l | ||
| ldmain.c | ||
| ldmain.h | ||
| ldmisc.c | ||
| ldmisc.h | ||
| ldver.c | ||
| ldver.h | ||
| ldwrite.c | ||
| ldwrite.h | ||
| lexsup.c | ||
| mac-ld.r | ||
| MAINTAINERS | ||
| Makefile.am | ||
| Makefile.in | ||
| mpw-config.in | ||
| mpw-make.sed | ||
| mri.c | ||
| mri.h | ||
| NEWS | ||
| pe-dll.c | ||
| pe-dll.h | ||
| README | ||
| stamp-h.in | ||
| sysdep.h | ||
| TODO | ||
README for LD
This is the GNU linker. It is distributed with other "binary
utilities" which should be in ../binutils. See ../binutils/README for
more general notes, including where to send bug reports.
There are many features of the linker:
* The linker uses a Binary File Descriptor library (../bfd)
that it uses to read and write object files. This helps
insulate the linker itself from the format of object files.
* The linker supports a number of different object file
formats. It can even handle multiple formats at once:
Read two input formats and write a third.
* The linker can be configured for cross-linking.
* The linker supports a control language.
* There is a user manual (ld.texinfo), as well as the
beginnings of an internals manual (ldint.texinfo).
Installation
============
See ../binutils/README.
If you want to make a cross-linker, you may want to specify
a different search path of -lfoo libraries than the default.
You can do this by setting the LIB_PATH variable in ./Makefile
or using the --with-lib-path configure switch.
To build just the linker, make the target all-ld from the top level
directory (one directory above this one).
Porting to a new target
=======================
See the ldint.texinfo manual.
Reporting bugs etc
===========================
See ../binutils/README.
Known problems
==============
The Solaris linker normally exports all dynamic symbols from an
executable. The GNU linker does not do this by default. This is
because the GNU linker tries to present the same interface for all
similar targets (in this case, all native ELF targets). This does not
matter for normal programs, but it can make a difference for programs
which try to dlopen an executable, such as PERL or Tcl. You can make
the GNU linker export all dynamic symbols with the -E or
--export-dynamic command line option.
HP/UX 9.01 has a shell bug that causes the linker scripts to be
generated incorrectly. The symptom of this appears to be "fatal error
- scanner input buffer overflow" error messages. There are various
workarounds to this:
* Build and install bash, and build with "make SHELL=bash".
* Update to a version of HP/UX with a working shell (e.g., 9.05).
* Replace "(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc)" in
genscripts.sh with "sh ${srcdir}..." (no parens) and make sure the
emulparams script used exports any shell variables it sets.