Check if host supports multi-byte NOPs before enabling CET on host.

gcc/

	PR bootstrap/99703
	* configure: Regenerated.

libbacktrace/

	PR bootstrap/99703
	* configure: Regenerated.

libcc1/

	PR bootstrap/99703
	* configure: Regenerated.

libcpp/

	PR bootstrap/99703
	* configure: Regenerated.

libdecnumber/

	PR bootstrap/99703
	* configure: Regenerated.

lto-plugin/

	PR bootstrap/99703
	* configure: Regenerated.

It's no longer necessary as file 0 is now set up in all cases.

	* dwarf.c (read_line_program): Don't special case file 0.
	(read_function_entry): Likewise.

	PR libbacktrace/98818
	* dwarf.c (dwarf_buf_error): Add errnum parameter.  Change all
	callers.
	* backtrace.h: Update backtrace_error_callback comment.

	* configure.ac: Check for objcopy --add-gnu-debuglink by using
	objcopy --help.
	* configure: Regenerate

	* Makefile.am (%_dwz): If dwz fails, use uncompressed debug info.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

	PR debug/98716
	* dwarf.c (read_v2_paths): Allocate zero entry for dirs and
	filenames.
	(read_line_program): Remove parameter u, change caller.  Don't
	subtract one from dirs and filenames index.
	(read_function_entry): Don't subtract one from filenames index.

ChangeLog:

	* libtool.m4: Match gnu* along other GNU systems.
	* libgo/config/libtool.m4: Match gnu* along other GNU systems.
	* libgo/configure: Re-generate.

libffi/
	* configure: Re-generate.

libgomp/
	* configure: Re-generate.

gcc/

	* configure: Re-generate.

libatomic/

	* configure: Re-generate.

libbacktrace/

	* configure: Re-generate.

libcc1/

	* configure: Re-generate.

libgfortran/

	* configure: Re-generate.

libgomp/

	* configure: Re-generate.

libhsail-rt/

	* configure: Re-generate.

libitm/

	* configure: Re-generate.

libobjc/

	* configure: Re-generate.

liboffloadmic/

	* configure: Re-generate.
	* plugin/configure: Re-generate.

libphobos/

	* configure: Re-generate.

libquadmath/

	* configure: Re-generate.

libsanitizer/

	* configure: Re-generate.

libssp/

	* configure: Re-generate.

libstdc++-v3/

	* configure: Re-generate.

libvtv/

	* configure: Re-generate.

lto-plugin/

	* configure: Re-generate.

zlib/

	* configure: Re-generate.

Do this separately from all other Copyright updates, as ChangeLog files
can be modified only separately.

The change in major version (and the increment from Darwin19 to 20)
caused libtool tests to fail which resulted in incorrect build settings
for shared libraries.

We take this opportunity to sort out the shared undefined symbols state
rather than propagating the current unsound behaviour into a new rev.

This change means that we default to the case that missing symbols are
considered an error, and if one wants to allow this intentionally, the
confiuration for that case should be set appropriately.

Three existing cases need undefined dynamic lookup:
 libitm, where there is already a configuration mechanism to add the
         flags.
 libcc1, where we add simple configuration to add the flags for Darwin.
 libsanitizer, where we can add to the existing extra flags.

libcc1/ChangeLog:

	PR target/97865
	* Makefile.am: Add dynamic_lookup to LD flags for Darwin.
	* configure.ac: Test for Darwin host and set a flag.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

libitm/ChangeLog:

	PR target/97865
	* configure.tgt: Add dynamic_lookup to XLDFLAGS for Darwin.
	* configure: Regenerate.

libsanitizer/ChangeLog:

	PR target/97865
	* configure.tgt: Add dynamic_lookup to EXTRA_CXXFLAGS for
	Darwin.
	* configure: Regenerate.

ChangeLog:

	PR target/97865
	* libtool.m4: Update handling of Darwin platform link flags
	for Darwin20.

gcc/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libatomic/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libbacktrace/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libffi/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libgfortran/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libgomp/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libhsail-rt/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libobjc/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libphobos/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libquadmath/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libssp/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libstdc++-v3/ChangeLog:

	PR target/97865
	* configure: Regenerate.

libvtv/ChangeLog:

	PR target/97865
	* configure: Regenerate.

zlib/ChangeLog:

	PR target/97865
	* configure: Regenerate.

	* dwarf.c (resolve_string): Use > rather than >= to check whether
	string index extends past buffer.
	(resolve_addr_index): Similarly for address index.

This change adds the +nodefaultrpath ld option to remove all library
paths that were specified with the -L option from the embedded path.

2020-11-29  John David Anglin  <danglin@gcc.gnu.org>

ChangeLog:
	* libtool.m4 (archive_cmds): Add +nodefaultrpath ld option on
	hppa64-*-hpux11*.

libatomic/ChangeLog:
	* configure: Regenerate.

libbacktrace/ChangeLog:
	* configure: Regenerate.

libcc1/ChangeLog:
	* configure: Regenerate.

libffi/ChangeLog:
	* configure: Regenerate.

libgfortran/ChangeLog:
	* configure: Regenerate.

libgomp/ChangeLog:
	* configure: Regenerate.

libhsail-rt/ChangeLog:
	* configure: Regenerate.

libitm/ChangeLog:
	* configure: Regenerate.

libobjc/ChangeLog:
	* configure: Regenerate.

liboffloadmic/ChangeLog:
	* configure: Regenerate.
	* plugin/configure: Regenerate.

libquadmath/ChangeLog:
	* configure: Regenerate.

libsanitizer/ChangeLog:
	* configure: Regenerate.

libssp/ChangeLog:
	* configure: Regenerate.

libstdc++-v3/ChangeLog:
	* configure: Regenerate.

libvtv/ChangeLog:
	* configure: Regenerate.

lto-plugin/ChangeLog:
	* configure: Regenerate.

zlib/ChangeLog:
	* configure: Regenerate.

Use an attribute rather than a comment when falling through a switch case.

	* internal.h (ATTRIBUTE_FALLTHROUGH): Define.
	* elf.c (elf_zlib_inflate): Use ATTRIBUTE_FALLTHROUGH.

libbacktrace/ChangeLog:
	PR libbacktrace/97082
	* Makefile.am (check_DATA): Add mtest.dSYM if USE_DSYMUTIL.
	* Makefile.in: Regenerate.

libbacktrace/ChangeLog:
	PR libbacktrace/97227
	* configure.ac (USE_DSYMUTIL): Define instead of HAVE_DSYMUTIL.
	* Makefile.am: Change all uses of HAVE_DSYMUTIL to USE_DSYMUTIL.
	* configure: Regenerate.
	* Makefile.in: Regenerate.

	* dwarf.c (report_inlined_functions): Handle PC == -1 and PC ==
	p->low.
	(dwarf_lookup_pc): Likewise.

	PR libbacktrace/97080
	* fileline.c (backtrace_syminfo_to_full_callback): New function.
	(backtrace_syminfo_to_full_error_callback): New function.
	* elf.c (elf_nodebug): Call syminfo_fn if possible.
	* internal.h (struct backtrace_call_full): Define.
	(backtrace_syminfo_to_full_callback): Declare.
	(backtrace_syminfo_to_full_error_callback): Declare.
	* mtest.c (f3): Only check all[i] if data.index permits.

This adds the PPC architecture variants for Mach-O libbacktrace.

With this (as for X86 and Arm) when dsymutil is run on the binary
we get a basic usable backtrace.

Testsuite results on powerpc-apple-darwin9 are the same as for X86:
 * btest fails (TBC why)
 * dwarf5 tests fail because dsymutil does not handle that so far.

libbacktrace/ChangeLog:

	* macho.c (MACH_O_CPU_TYPE_PPC): New.
	(MACH_O_CPU_TYPE_PPC64): New.
	Add compile-tests for powerpc to the Mach-O variants.

libbacktrace/ChangeLog:
	PR libbacktrace/93608
	Add support for MiniDebugInfo.
	* elf.c (struct elf_view): Define.  Replace most uses of
	backtrace_view with elf_view.
	(elf_get_view): New static functions.  Replace most calls of
	backtrace_get_view with elf_get_view.
	(elf_release_view): New static functions.  Replace most calls of
	backtrace_release_view with elf_release_view.
	(elf_uncompress_failed): Rename from elf_zlib_failed.  Change all
	callers.
	(LZMA_STATES, LZMA_POS_STATES, LZMA_DIST_STATES): Define.
	(LZMA_DIST_SLOTS, LZMA_DIST_MODEL_START): Define.
	(LZMA_DIST_MODEL_END, LZMA_FULL_DISTANCES): Define.
	(LZMA_ALIGN_SIZE, LZMA_LEN_LOW_SYMBOLS): Define.
	(LZMA_LEN_MID_SYMBOLS, LZMA_LEN_HIGH_SYMBOLS): Define.
	(LZMA_LITERAL_CODERS_MAX, LZMA_LITERAL_CODER_SIZE): Define.
	(LZMA_PROB_IS_MATCH_LEN, LZMA_PROB_IS_REP_LEN): Define.
	(LZMA_PROB_IS_REP0_LEN, LZMA_PROB_IS_REP1_LEN): Define.
	(LZMA_PROB_IS_REP2_LEN, LZMA_PROB_IS_REP0_LONG_LEN): Define.
	(LZMA_PROB_DIST_SLOT_LEN, LZMA_PROB_DIST_SPECIAL_LEN): Define.
	(LZMA_PROB_DIST_ALIGN_LEN): Define.
	(LZMA_PROB_MATCH_LEN_CHOICE_LEN): Define.
	(LZMA_PROB_MATCH_LEN_CHOICE2_LEN): Define.
	(LZMA_PROB_MATCH_LEN_LOW_LEN): Define.
	(LZMA_PROB_MATCH_LEN_MID_LEN): Define.
	(LZMA_PROB_MATCH_LEN_HIGH_LEN): Define.
	(LZMA_PROB_REP_LEN_CHOICE_LEN): Define.
	(LZMA_PROB_REP_LEN_CHOICE2_LEN): Define.
	(LZMA_PROB_REP_LEN_LOW_LEN): Define.
	(LZMA_PROB_REP_LEN_MID_LEN): Define.
	(LZMA_PROB_REP_LEN_HIGH_LEN): Define.
	(LZMA_PROB_LITERAL_LEN): Define.
	(LZMA_PROB_IS_MATCH_OFFSET, LZMA_PROB_IS_REP_OFFSET): Define.
	(LZMA_PROB_IS_REP0_OFFSET, LZMA_PROB_IS_REP1_OFFSET): Define.
	(LZMA_PROB_IS_REP2_OFFSET): Define.
	(LZMA_PROB_IS_REP0_LONG_OFFSET): Define.
	(LZMA_PROB_DIST_SLOT_OFFSET): Define.
	(LZMA_PROB_DIST_SPECIAL_OFFSET): Define.
	(LZMA_PROB_DIST_ALIGN_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_CHOICE_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_CHOICE2_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_LOW_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_MID_OFFSET): Define.
	(LZMA_PROB_MATCH_LEN_HIGH_OFFSET): Define.
	(LZMA_PROB_REP_LEN_CHOICE_OFFSET): Define.
	(LZMA_PROB_REP_LEN_CHOICE2_OFFSET): Define.
	(LZMA_PROB_REP_LEN_LOW_OFFSET): Define.
	(LZMA_PROB_REP_LEN_MID_OFFSET): Define.
	(LZMA_PROB_REP_LEN_HIGH_OFFSET): Define.
	(LZMA_PROB_LITERAL_OFFSET): Define.
	(LZMA_PROB_TOTAL_COUNT): Define.
	(LZMA_IS_MATCH, LZMA_IS_REP, LZMA_IS_REP0): Define.
	(LZMA_IS_REP1, LZMA_IS_REP2, LZMA_IS_REP0_LONG): Define.
	(LZMA_DIST_SLOT, LZMA_DIST_SPECIAL, LZMA_DIST_ALIGN): Define.
	(LZMA_MATCH_LEN_CHOICE, LZMA_MATCH_LEN_CHOICE2): Define.
	(LZMA_MATCH_LEN_LOW, LZMA_MATCH_LEN_MID): Define.
	(LZMA_MATCH_LEN_HIGH, LZMA_REP_LEN_CHOICE): Define.
	(LZMA_REP_LEN_CHOICE2, LZMA_REP_LEN_LOW): Define.
	(LZMA_REP_LEN_MID, LZMA_REP_LEN_HIGH, LZMA_LITERAL): Define.
	(elf_lzma_varint): New static function.
	(elf_lzma_range_normalize): New static function.
	(elf_lzma_bit, elf_lzma_integer): New static functions.
	(elf_lzma_reverse_integer): New static function.
	(elf_lzma_len, elf_uncompress_lzma_block): New static functions.
	(elf_uncompress_lzma): New static function.
	(backtrace_uncompress_lzma): New function.
	(elf_add): Add memory and memory_size parameters.  Change all
	callers.  Look for .gnu_debugdata section, and, if found,
	decompress it and use it for symbols and debug info.  Permit the
	descriptor parameter to be -1.
	* internal.h (backtrace_uncompress_lzma): Declare.
	* mtest.c: New file.
	* xztest.c: New file.
	* configure.ac: Check for nm, xz, and comm programs.  Check for
	liblzma library.
	(HAVE_MINIDEBUG): Define.
	* Makefile.am (mtest_SOURCES): Define.
	(mtest_CFLAGS, mtest_LDADD): Define.
	(TESTS): Add mtest_minidebug if HAVE_MINIDEBUG.
	(%_minidebug): New pattern rule, if HAVE_MINIDEBUG.
	(xztest_SOURCES, xztest_CFLAGS, xztest_LDADD): Define.
	(xztest_alloc_SOURCES, xztest_alloc_CFLAGS): Define
	(xztest_alloc_LDADD): Define.
	(BUILDTESTS): Add mtest, xztest, xztest_alloc.
	(CLEANFILES): Add files created by minidebug pattern.
	(btest.lo): Correct INCDIR reference.
	(mtest.lo, xztest.lo, ztest.lo): New targets.
	* configure: Regenerate.
	* config.h.in: Regenerate.
	* Makefile.in: Regenerate.

	* pecoff.c (coff_initialize_syminfo): Add is_64 parameter.
	(coff_add): Determine and pass is_64.

	PR libbacktrace/96973
	* fileline.c (macho_get_executable_path): New static function.
	(fileline_initialize): Call macho_get_executable_path.

Searching for a range match can cause the search order to not match
the sort order, which can cause libbacktrace to miss matching entries.
Allocate an extra entry at the end of function_addrs and unit_addrs vectors,
so that we can safely compare to the next entry when searching.
Adjust the matching code accordingly.

Fixes https://github.com/ianlancetaylor/libbacktrace/issues/44.

	* dwarf.c (function_addrs_search): Compare against the next entry
	low address, not the high address.
	(unit_addrs_search): Likewise.
	(build_address_map): Add a trailing unit_addrs.
	(read_function_entry): Add a trailing function_addrs.
	(read_function_info): Likewise.
	(report_inlined_functions): Search backward for function_addrs
	match.
	(dwarf_lookup_pc): Search backward for unit_addrs and
	function_addrs matches.

	* simple.c (simple_unwind): Correct comment spelling.

	* macho.c (macho_add_dsym): Make space for '/' in dsym.  Use
	correct length when freeing diralc.