* ldmain.c (main): initialize link_info.pei386_auto_import
* pe-dll.c: new tables for auto-export filtering
(auto_export): change API, pass abfd for contextual filtering.
Loop thru tables of excluded symbols instead of comparing
"by hand".
2001-08-02 Paul Sokolovsky <paul.sokolovsky@technologist.com>
* pe-dll.c: new variable pe_dll_enable_extra_debug. New
static variable current_sec (static struct sec *). Add
forward declaration for add_bfd_to_link.
(process_def_file): Don't export undefined symbols. Do not
export symbols starting with "_imp__". Call auto_export()
with new API.
(pe_walk_relocs_of_symbol): New function.
(generate_reloc): add optional extra debugging
(pe_dll_generate_def_file): eliminate extraneous initial blank
line in output
(make_one): enlarge symtab to make room for __nm__ symbols
(DATA auto-import support).
(make_singleton_name_thunk): New function.
(make_import_fixup_mark): New function.
(make_import_fixup_entry): New function.
(pe_create_import_fixup): New function.
(add_bfd_to_link): Specify that 'name' argument is a CONST
char *.
* pe-dll.h: declare new variable pe_dll_extra_pe_debug;
declare new functions pe_walk_relocs_of_symbol and
pe_create_import_fixup.
* emultempl/pe.em: add new options --enable-auto-import,
--disable-auto-import, and --enable-extra-pe-debug.
(make_import_fixup): New function.
(pe_find_data_imports): New function.
(pr_sym): New function.
(gld_${EMULATION_NAME}_after_open): Add optional extra pe
debugging. Call pe_find_data_imports. Mark .idata as DATA, not
CODE.
2001-08-02 Charles Wilson <cwilson@ece.gatech.edu>
* ld.texinfo: add additional documentation for
--export-all-symbols. Document --out-implib,
--enable-auto-image-base, --disable-auto-image-base,
--dll-search-prefix, --enable-auto-import, and
--disable-auto-import.
* ldint.texinfo: Add detailed documentation on auto-import
implementation.
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.
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.
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