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Without this, GCC warns:
In file included from conftest.c:36:
../../libctf/../bfd/elf-bfd.h: In function 'bfd_section_is_ctf':
../../libctf/../bfd/elf-bfd.h:3089:10: warning: implicit declaration of function 'strncmp' [-Wimplicit-function-declaration]
3089 | return strncmp (name, ".ctf", 4) == 0 && (name[4] == 0 || name[4] == '.');
| ^~~~~~~
../../libctf/../bfd/elf-bfd.h:3089:33: warning: 'strncmp' argument 3 type is 'int' where 'long unsigned int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
3089 | return strncmp (name, ".ctf", 4) == 0 && (name[4] == 0 || name[4] == '.');
| ^
<built-in>: note: built-in 'strncmp' declared here
These warnings do not currently throw off the result of the configure
check, but it's better to squash them anyway.
libctf/ChangeLog
2021-02-03 Nick Alcock <nick.alcock@oracle.com>
* configure.ac (ac_cv_libctf_bfd_elf): Include string.h.
* configure: Regenerated.
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The run_native_host_cmd implementation in testsuite/lib/ctf-lib.exp
uses try/catch, which are new in Tcl 8.6. Require a Tcl that knows
that try exists, as suggested by Jan Beulich.
libctf/ChangeLog
2021-02-03 Nick Alcock <nick.alcock@oracle.com>
* configure.ac (EXPECT): Check for, in order to define...
(TCL_TRY): ... this, if Tcl supports try/catch.
* Makefile.am (TCL_TRY): Run the testsuite only if set.
* configure: Regenerated.
* Makefile.in: Likewise.
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Right now, these libraries hardwire -L../intl -lintl on a few fixed
platforms, which works fine on those platforms but on other platforms
leads to shared libraries that lack libintl_* symbols when configured
--with-included-gettext, and/or static libraries that contain libintl as
*another* static library. If we instead use the LIBINTL variable
defined in ../intl/config.intl, this gives us the right thing on all
three classes of platform (gettext in libc, gettext in system libintl,
gettext in ../intl/libintl.a).. This also means we can rip out some
Darwin-specific machinery from configure.ac and also simplify the Cygwin
side.
This also means that the libctf testsuite (and other places that include
libbfd, libopcodes or libctf) don't need to grow libintl dependencies
just on account of those libraries (though they still need such
dependencies if they themselves use gettext machinery).
bfd/ChangeLog
2021-02-03 Nick Alcock <nick.alcock@oracle.com>
* configure.ac (SHARED_LIBADD): Remove explicit -lintl population in
favour of LIBINTL.
* configure: Regenerated.
libctf/ChangeLog
2021-02-02 Nick Alcock <nick.alcock@oracle.com>
* configure.ac (CTF_LIBADD): Remove explicit -lintl population in
favour of LIBINTL.
* Makefile.am (libctf_nobfd_la_LIBADD): No longer explicitly
include $(LIBINTL).
(check-DEJAGNU): Pass down to tests as well.
* configure: Regenerated.
* Makefile.in: Likewise.
opcodes/ChangeLog
2021-02-04 Nick Alcock <nick.alcock@oracle.com>
* configure.ac (SHARED_LIBADD): Remove explicit -lintl population in
favour of LIBINTL.
* configure: Regenerated.
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Compiling binutils using -flto=jobserver with GCC 11 leads to
libtool: link: gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -Wstack-usage=262144 -Wwrite-strings -I../../gas/../zlib -g -O2 -fprofile-generate -flto=jobserver -o as-new app.o as.o atof-generic.o compress-debug.o cond.o depend.o dwarf2dbg.o dw2gencfi.o ecoff.o ehopt.o expr.o flonum-copy.o flonum-konst.o flonum-mult.o frags.o hash.o input-file.o input-scrub.o listing.o literal.o macro.o messages.o output-file.o read.o remap.o sb.o stabs.o subsegs.o symbols.o write.o config/tc-i386.o config/obj-elf.o config/atof-ieee.o ../opcodes/.libs/libopcodes.a ../bfd/.libs/libbfd.a -L/tmp/binutils-gdb/objdir/zlib -lz ../libiberty/libiberty.a -ldl
lto-wrapper: warning: jobserver is not available: '--jobserver-auth=' is not present in 'MAKEFLAGS'
since the '+' is missing on the recipe line in Makefiles generated by
automake. Add the '+' to the recipe line by hand.
bfd/
PR binutils/26792
* configure.ac: Use GNU_MAKE_JOBSERVER.
* aclocal.m4: Regenerated.
* configure: Likewise.
binutils/
PR binutils/26792
* configure.ac: Use GNU_MAKE_JOBSERVER.
* aclocal.m4: Regenerated.
* configure: Likewise.
config/
PR binutils/26792
* jobserver.m4: New file.
gas/
PR binutils/26792
* configure.ac: Use GNU_MAKE_JOBSERVER.
* aclocal.m4: Regenerated.
* configure: Likewise.
gprof/
PR binutils/26792
* configure.ac: Use GNU_MAKE_JOBSERVER.
* aclocal.m4: Regenerated.
* configure: Likewise.
ld/
PR binutils/26792
* configure.ac: Use GNU_MAKE_JOBSERVER.
* aclocal.m4: Regenerated.
* configure: Likewise.
libctf/
PR binutils/26792
* configure.ac: Use GNU_MAKE_JOBSERVER.
* aclocal.m4: Regenerated.
* configure: Likewise.
opcodes/
PR binutils/26792
* configure.ac: Use GNU_MAKE_JOBSERVER.
* aclocal.m4: Regenerated.
* configure: Likewise.
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Check if AR works with --plugin and rc before passing --plugin to AR and
RANLIB.
bfd/
PR ld/27173
binutils/
PR ld/27173
* configure: Regenerated.
gas/
PR ld/27173
* configure: Regenerated.
gprof/
PR ld/27173
* configure: Regenerated.
ld/
PR ld/27173
* configure: Regenerated.
libctf/
PR ld/27173
* configure: Regenerated.
opcodes/
PR ld/27173
* configure: Regenerated.
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Detect GCC LTO plugin. Pass --plugin to AR and RANLIB to support LTO
build.
bfd/
* configure: Regenerated.
binutils/
* configure: Regenerated.
gas/
* configure: Regenerated.
gprof/
* configure: Regenerated.
ld/
* configure: Regenerated.
libctf/
* configure: Regenerated.
opcodes/
* configure: Regenerated.
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commit f478212851 did the regen by hand, missed a change in
ld/configure and didn't update line numbers. Fix that, and an old
regen of ld/Makefile.in with the wrong automake.
bfd/
* configure: Regenerate.
binutils/
* configure: Regenerate.
gas/
* configure: Regenerate.
gprof/
* configure: Regenerate.
ld/
* Makefile.in: Regenerate.
* configure: Regenerate.
libctf/
* configure: Regenerate.
opcodes/
* configure: Regenerate.
zlib/
* configure: Regenerate.
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47a889a4ca20 ("Improve GNU/Hurd support.") fixed detection of shlibpath_overrides_runpath, thus avoiding unnecessary relink. This backports it.
. * libtool.m4: Match gnu* along other GNU systems.
*/ChangeLog:
* configure: Re-generate.
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This complex morass inherited from libopcodes, which endeavours to
implement the effect of specifying ../bfd/libbfd.la in _LIBADD without
actually doing so, appears to be working around a libtool bug which as
far as I can see is no longer present (i.e., the install directory no
longer appears in -L arguments in libtool link-mode invocations, so
there is no danger of picking up old libbfds or other dependent
libraries).
Replaced with a simple reference to libbfd.la in the appropriate place.
Also adjusted things a little more so that libctf.la and libctf-nobfd.la
are self-contained, even when linking statically. This opens up the
possibility of running libtool to link against libctf from inside the
(upcoming) testsuite.
libctf/ChangeLog
2021-01-05 Nick Alcock <nick.alcock@oracle.com>
* configure.ac (BFD_LIBADD): Remove.
(BFD_DEPENDENCIES): Likewise. Remove associated cases.
(SHARED_LIBADD): Rename to...
(CTF_LIBADD): ... this. Stick in a suitable libiberty even when
linking statically.
* Makefile.am (libctf_nobfd_la_LIBADD): Adjust accordingly.
libctf uses libintl.
(libctf_la_LIBADD): Reference libbfd.la directly, not via
BFD_LIBADD.
(libctf_la_DEPENDENCIES): Remove.
* Makefile.in: Regenerate.
* configure: Likewise.
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PR 27117
* configure.ac: Make AC_CONFIG_MACRO_DIR consistent with
ACLOCAL_AMFLAGS -I dirs.
* configure: Regenerate.
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We gettextize under our package name, which we change to a more
reasonable 'libctf'. Our internationalization support is mostly
provided by ctf-intl.h, which is a copy of opcodes/opintl.h with
the non-gettext_noop N_() expansion debracketed to avoid pedantic
compiler warnings.
The libctf error strings returned by ctf_errmsg are marked up for
internationalization.
(We also adjust binutils's Makefile a tiny bit to allow for the
fact that libctf now uses functions from libintl.)
binutils/ChangeLog
2020-08-27 Nick Alcock <nick.alcock@oracle.com>
* Makefile.am (readelf_LDADD): Move $(LIBINTL) after $(LIBCTF_NOBFD).
* Makefile.in: Regenerated.
libctf/ChangeLog
2020-08-27 Nick Alcock <nick.alcock@oracle.com>
* configure.ac: Adjust package name to simply 'libctf': arbitrarily
declare this to be version 1.2.0.
* Makefile.am (AM_CPPFLAGS): Add @INCINTL@.
* Makefile.in: Regenerated.
* configure: Regenerated.
* ctf-intl.h: New file, lightly modified from opcodes/opintl.h.
* ctf-impl.h: Include it.
* ctf-error.r (_ctf_errlist_t): Mark strings as noop-translatable.
(ctf_errmsg): Actually translate them.
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This adds the core deduplicator that the ctf_link machinery calls
(possibly repeatedly) to link the CTF sections: it takes an array
of input ctf_file_t's and another array that indicates which entries in
the input array are parents of which other entries, and returns an array
of outputs. The first output is always the ctf_file_t on which
ctf_link/ctf_dedup/etc was called: the other outputs are child dicts
that have the first output as their parent.
include/
* ctf-api.h (CTF_LINK_SHARE_DUPLICATED): No longer unimplemented.
libctf/
* ctf-impl.h (ctf_type_id_key): New, the key in the
cd_id_to_file_t.
(ctf_dedup): New, core deduplicator state.
(ctf_file_t) <ctf_dedup>: New.
<ctf_dedup_atoms>: New.
<ctf_dedup_atoms_alloc>: New.
(ctf_hash_type_id_key): New prototype.
(ctf_hash_eq_type_id_key): Likewise.
(ctf_dedup_atoms_init): Likewise.
* ctf-hash.c (ctf_hash_eq_type_id_key): New.
(ctf_dedup_atoms_init): Likewise.
* ctf-create.c (ctf_serialize): Adjusted.
(ctf_add_encoded): No longer static.
(ctf_add_reftype): Likewise.
* ctf-open.c (ctf_file_close): Destroy the
ctf_dedup_atoms_alloc.
* ctf-dedup.c: New file.
* ctf-decls.h [!HAVE_DECL_STPCPY]: Add prototype.
* configure.ac: Check for stpcpy.
* Makefile.am: Add it.
* Makefile.in: Regenerate.
* config.h.in: Regenerate.
* configure: Regenerate.
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Add a new debugging configure option, --enable-libctf-hash-debugging,
off by default, which lets you configure in expensive internal
consistency checks and enable the printing of debugging output when
LIBCTF_DEBUG=t before type deduplication has happened.
In this commit we just add the option and cause it to turn ctf_assert
into a real, hard assert for easier debugging.
libctf/
* configure.ac: Add --enable-libctf-hash-debugging.
* aclocal.m4: Pull in enable.m4, for GCC_ENABLE.
* Makefile.in: Regenerated.
* configure: Likewise.
* config.h.in: Likewise.
* ctf-impl.h [ENABLE_LIBCTF_HASH_DEBUGGING]
(ctf_assert): Define to assert.
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We've been using this for all of libctf's history in binutils: we should
check for it in configure.
libctf/
configure.ac: Check for vasprintf.
configure: Regenerated.
config.h.in: Likewise.
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We were not using the right configure machinery to spot libintl on
platforms where it was required, leading to the spurious failure of
various configure tests (e.g. for things like ELF support in BFD).
libctf/
* aclocal.m4: Add config/gettext-sister.m4: Shuffle into
alphabetical order.
* configure.ac: Add ZW_GNU_GETTEXT_SISTER_DIR.
* config.h.in: Regenerated.
* Makefile.in: Likewise.
* configure: Likewise.
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At least one C library (uclibc-ng) defines some of these only when
the compiler is GCC. We might as well test for all three cases and
handle any of them being missing.
Very similar code exists in libctf and split between elfcpp and gold:
fix both.
(Also sync up elfcpp with a change made to libctf swap.h a few months
ago: since there is no out-of-line definition of the bswap replacements,
they should be declared static inline, not just inline, to prevent the
linker generating out-of-line references to them.)
PR libctf/25120
libctf/
* configure.ac: Check for bswap_16, bswap_32, and bswap_64 decls.
* swap.h (bswap_16): Do not assume that presence of <byteswap.h>
means this is declared.
(bswap_32): Likewise.
(bswap_64): Likewise.
(bswap_identity_64): Remove, unused.
* configure: Regenerated.
* config.h.in: Likewise.
gold/
* configure.ac: Check for bswap_16, bswap_32, and bswap_64 decls.
* configure: Regenerated.
* config.h.in: Likewise.
elfcpp/
* elfcpp_swap.h (bswap_16): Do not assume that presence of
<byteswap.h> means this is declared. Make static inline, matching
recent change to libctf, since there is no non-inline definition
of these functions.
(bswap_32): Likewise.
(bswap_64): Likewise.
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This commit fixes a compilation warning when compiling libctf
on MinGW:
libctf/ctf-dump.c:118:8: warning: implicit declaration of function
'asprintf'; did you mean 'vasprintf'? [-Wimplicit-function-declaration]
if (asprintf (&bit, " %lx: [slice 0x%x:0x%x]",
^~~~~~~~
vasprintf
MinGW doesn't provide that function, so we depend on the one provided
by libiberty. However, the declaration is guarded by HAVE_DECL_ASPRINTF,
which we do not have in libctf's config.h.
libctf/ChangeLog:
PR binutils/25155:
* configure.ac: Add AC_CHECK_DECLS([asprintf]).
* configure, config.h.in: Regenerate.
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This lets other programs read and write CTF-format data.
Two versioned shared libraries are created: libctf.so and
libctf-nobfd.so. They contain identical content except that
libctf-nobfd.so contains no references to libbfd and does not implement
ctf_open, ctf_fdopen, ctf_bfdopen or ctf_bfdopen_ctfsect, so it can be
used by programs that cannot use BFD, like readelf.
The soname major version is presently .0 until the linker API
stabilizes, when it will flip to .1 and hopefully never change again.
New in v3.
v4: libtoolize and turn into a pair of shared libraries. Drop
--enable-install-ctf: now controlled by --enable-shared and
--enable-install-libbfd, like everything else.
v5: Add ../bfd to ACLOCAL_AMFLAGS and AC_CONFIG_MACRO_DIR. Fix tabdamage.
* Makefile.def (host_modules): libctf is no longer no_install.
* Makefile.in: Regenerated.
libctf/
* configure.ac (AC_DISABLE_SHARED): New, like opcodes/.
(LT_INIT): Likewise.
(AM_INSTALL_LIBBFD): Likewise.
(dlopen): Note why this is necessary in a comment.
(SHARED_LIBADD): Initialize for possibly-PIC libiberty: derived from
opcodes/.
(SHARED_LDFLAGS): Likewise.
(BFD_LIBADD): Likewise, for libbfd.
(BFD_DEPENDENCIES): Likewise.
(VERSION_FLAGS): Initialize, using a version script if ld supports
one, or libtool -export-symbols-regex otherwise.
(AC_CONFIG_MACRO_DIR): Add ../BFD.
* Makefile.am (ACLOCAL_AMFLAGS): Likewise.
(INCDIR): New.
(AM_CPPFLAGS): Use $(srcdir), not $(top_srcdir).
(noinst_LIBRARIES): Replace with...
[INSTALL_LIBBFD] (lib_LTLIBRARIES): This, or...
[!INSTALL_LIBBFD] (noinst_LTLIBRARIES): ... this, mentioning new
libctf-nobfd.la as well.
[INSTALL_LIBCTF] (include_HEADERS): Add the CTF headers.
[!INSTALL_LIBCTF] (include_HEADERS): New, empty.
(libctf_a_SOURCES): Rename to...
(libctf_nobfd_la_SOURCES): ... this, all of libctf other than
ctf-open-bfd.c.
(libctf_la_SOURCES): Now derived from libctf_nobfd_la_SOURCES,
with ctf-open-bfd.c added.
(libctf_nobfd_la_LIBADD): New, using @SHARED_LIBADD@.
(libctf_la_LIBADD): New, using @BFD_LIBADD@ as well.
(libctf_la_DEPENDENCIES): New, using @BFD_DEPENDENCIES@.
* Makefile.am [INSTALL_LIBCTF]: Use it.
* aclocal.m4: Add ../bfd/acinclude.m4, ../config/acx.m4, and the
libtool macros.
* libctf.ver: New, everything is version LIBCTF_1.0 currently (even
the unstable components).
* Makefile.in: Regenerated.
* config.h.in: Likewise.
* configure: Likewise.
binutils/
* Makefile.am (LIBCTF): Mention the .la file.
(LIBCTF_NOBFD): New.
(readelf_DEPENDENCIES): Use it.
(readelf_LDADD): Likewise.
* Makefile.in: Regenerated.
ld/
* configure.ac (TESTCTFLIB): Set to the .so or .a, like TESTBFDLIB.
* Makefile.am (TESTCTFLIB): Use it.
(LIBCTF): Use the .la file.
(check-DEJAGNU): Use it.
* Makefile.in: Regenerated.
* configure: Likewise.
include/
* ctf-api.h: Note the instability of the ctf_link interfaces.
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bfd/
* Makefile.in: Regenerate.
* configure: Regenerate.
binutils/
* Makefile.in: Regenerate.
* aclocal.m4: Regenerate.
* doc/Makefile.in: Regenerate.
gas/
* Makefile.in: Regenerate.
* configure: Regenerate.
* doc/Makefile.in: Regenerate.
ld/
* Makefile.in: Regenerate.
* configure: Regenerate.
libctf/
* configure: Regenerate.
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(Not tested on any such platforms, since I don't have access to any at
the moment. Testing encouraged.)
libctf/
* configure.ac: Check for O_CLOEXEC.
* ctf-decls.h (O_CLOEXEC): Define (to 0), if need be.
* config.h.in: Regenerate.
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We cannot just look for any declaration of qsort_r, because some
operating systems have a qsort_r that has a different prototype
but which still has a pair of pointers in the right places (the last two
args are interchanged): so use AC_LINK_IFELSE to check for both
known variants of qsort_r(), and swap their args into a consistent order
in a suitable inline function. (The code for this is taken almost
unchanged from gnulib.)
(Now we are not using AC_LIBOBJ any more, we can use a better name for
the qsort_r replacement as well.)
libctf/
* qsort_r.c: Rename to...
* ctf-qsort_r.c: ... this.
(_quicksort): Define to ctf_qsort_r.
* ctf-decls.h (qsort_r): Remove.
(ctf_qsort_r): Add.
(struct ctf_qsort_arg): New, transport the real ARG and COMPAR.
(ctf_qsort_compar_thunk): Rearrange the arguments to COMPAR.
* Makefile.am (libctf_a_LIBADD): Remove.
(libctf_a_SOURCES): New, add ctf-qsort_r.c.
* ctf-archive.c (ctf_arc_write): Call ctf_qsort_r, not qsort_r.
* ctf-create.c (ctf_update): Likewise.
* configure.ac: Check for BSD versus GNU qsort_r signature.
* Makefile.in: Regenerate.
* config.h.in: Likewise.
* configure: Likewise.
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- Use of nonportable <endian.h>
- Use of qsort_r
- Use of zlib without appropriate magic to pull in the binutils zlib
- Use of off64_t without checking (fixed by dropping the unused fields
that need off64_t entirely)
- signedness problems due to long being too short a type on 32-bit
platforms: ctf_id_t is now 'unsigned long', and CTF_ERR must be
used only for functions that return ctf_id_t
- One lingering use of bzero() and of <sys/errno.h>
All fixed, using code from gnulib where possible.
Relatedly, set cts_size in a couple of places it was missed
(string table and symbol table loading upon ctf_bfdopen()).
binutils/
* objdump.c (make_ctfsect): Drop cts_type, cts_flags, and
cts_offset.
* readelf.c (shdr_to_ctf_sect): Likewise.
include/
* ctf-api.h (ctf_sect_t): Drop cts_type, cts_flags, and cts_offset.
(ctf_id_t): This is now an unsigned type.
(CTF_ERR): Cast it to ctf_id_t. Note that it should only be used
for ctf_id_t-returning functions.
libctf/
* Makefile.am (ZLIB): New.
(ZLIBINC): Likewise.
(AM_CFLAGS): Use them.
(libctf_a_LIBADD): New, for LIBOBJS.
* configure.ac: Check for zlib, endian.h, and qsort_r.
* ctf-endian.h: New, providing htole64 and le64toh.
* swap.h: Code style fixes.
(bswap_identity_64): New.
* qsort_r.c: New, from gnulib (with one added #include).
* ctf-decls.h: New, providing a conditional qsort_r declaration,
and unconditional definitions of MIN and MAX.
* ctf-impl.h: Use it. Do not use <sys/errno.h>.
(ctf_set_errno): Now returns unsigned long.
* ctf-util.c (ctf_set_errno): Adjust here too.
* ctf-archive.c: Use ctf-endian.h.
(ctf_arc_open_by_offset): Use memset, not bzero. Drop cts_type,
cts_flags and cts_offset.
(ctf_arc_write): Drop debugging dependent on the size of off_t.
* ctf-create.c: Provide a definition of roundup if not defined.
(ctf_create): Drop cts_type, cts_flags and cts_offset.
(ctf_add_reftype): Do not check if type IDs are below zero.
(ctf_add_slice): Likewise.
(ctf_add_typedef): Likewise.
(ctf_add_member_offset): Cast error-returning ssize_t's to size_t
when known error-free. Drop CTF_ERR usage for functions returning
int.
(ctf_add_member_encoded): Drop CTF_ERR usage for functions returning
int.
(ctf_add_variable): Likewise.
(enumcmp): Likewise.
(enumadd): Likewise.
(membcmp): Likewise.
(ctf_add_type): Likewise. Cast error-returning ssize_t's to size_t
when known error-free.
* ctf-dump.c (ctf_is_slice): Drop CTF_ERR usage for functions
returning int: use CTF_ERR for functions returning ctf_type_id.
(ctf_dump_label): Likewise.
(ctf_dump_objts): Likewise.
* ctf-labels.c (ctf_label_topmost): Likewise.
(ctf_label_iter): Likewise.
(ctf_label_info): Likewise.
* ctf-lookup.c (ctf_func_args): Likewise.
* ctf-open.c (upgrade_types): Cast to size_t where appropriate.
(ctf_bufopen): Likewise. Use zlib types as needed.
* ctf-types.c (ctf_member_iter): Drop CTF_ERR usage for functions
returning int.
(ctf_enum_iter): Likewise.
(ctf_type_size): Likewise.
(ctf_type_align): Likewise. Cast to size_t where appropriate.
(ctf_type_kind_unsliced): Likewise.
(ctf_type_kind): Likewise.
(ctf_type_encoding): Likewise.
(ctf_member_info): Likewise.
(ctf_array_info): Likewise.
(ctf_enum_value): Likewise.
(ctf_type_rvisit): Likewise.
* ctf-open-bfd.c (ctf_bfdopen): Drop cts_type, cts_flags and
cts_offset.
(ctf_simple_open): Likewise.
(ctf_bfdopen_ctfsect): Likewise. Set cts_size properly.
* Makefile.in: Regenerate.
* aclocal.m4: Likewise.
* config.h: Likewise.
* configure: Likewise.
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All machinery works as on ELF, except for automatic loading of ELF
string and symbol tables in the BFD-style open machinery.
* Makefile.def (dependencies): configure-libctf depends on all-bfd
and all its deps.
* Makefile.in: Regenerated.
libctf/
* configure.in: Check for bfd_section_from_elf_index.
* configure: Regenerate.
* config.h.in [HAVE_BFD_ELF]: Likewise.
* libctf/ctf_open_bfd (ctf_bfdopen_ctfsect): Use it.
abfd is potentially unused now.
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This ties libctf into the build system, and makes binutils depend on it
(used by the next commits).
* Makefile.def (host_modules): Add libctf.
* Makefile.def (dependencies): Likewise.
libctf depends on zlib, libiberty, and bfd.
* Makefile.in: Regenerated.
* configure.ac (host_libs): Add libctf.
* configure: Regenerated.
libctf/
* Makefile.am: New.
* Makefile.in: Regenerated.
* config.h.in: Likewise.
* aclocal.m4: Likewise.
* configure: Likewise.
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