We use this in the sim tree currently.  Rather than require people to
have pkg-config installed, include it in the config/ dir.

config/ChangeLog:

	* pkg.m4: New file from pkg-config-0.29.2.

SVN r216772 accidentally copied & pasted this prototype when adding
other ones nearby.

include/ChangeLog:

	* libiberty.h (strverscmp): Delete duplicate prototype.

Ideally, the linker will be queried for its version and that will be
used to determine capabilities that cannot be discovered from
reasonable configuration testing.

When building cross tools, this might not be possible, and we have
strategies for providing useful defaults.  These are adjusted here to
refect current choices.

gcc/ChangeLog:

	* config/darwin.h (MIN_LD64_NO_COAL_SECTS): Adjust.
	Amend handling for LD64_VERSION fallback defaults.

The darwinN.h headers (with the sole exception of darwin7.h,
which contains a target macro definition) now only contain
values that set fall-backs for cross-compilations, these can
be provided from the config.gcc script which means we no longer
need the darwinN.h - so delete them.

gcc/ChangeLog:

	* config.gcc: Compute default version information
	from the configured target.  Likewise defaults for
	ld64.
	* config/darwin10.h: Removed.
	* config/darwin12.h: Removed.
	* config/darwin9.h: Removed.
	* config/rs6000/darwin8.h: Removed.

Darwin defines ASM_OUTPUT_ALIGNED_DECL_COMMON which is used in
preference to ASM_OUTPUT_ALIGNED_COMMON, which makes the latter
definition dead code.  Remove this.

gcc/ChangeLog:

	* config/darwin9.h (ASM_OUTPUT_ALIGNED_COMMON): Delete.

We now need a modern (C++11) toolchain to bootstrap GCC, so there's no
need to skip the stack protect for Darwin < 9.

gcc/ChangeLog:

	* config/darwin9.h (STACK_CHECK_STATIC_BUILTIN): Move from here..
	* config/darwin.h (STACK_CHECK_STATIC_BUILTIN): .. to here.

There is no need to make the LINK_GCC_C_SEQUENCE_SPEC conditional on
configuration parameters, it is adequately conditionalized on the
macosx-version-min.

gcc/ChangeLog:

	* config/darwin10.h (LINK_GCC_C_SEQUENCE_SPEC): Move from
	here...
	* config/darwin.h (LINK_GCC_C_SEQUENCE_SPEC): ... to here.

The darwinN.h headers were (presumably) introduced to allow specs to be
adjusted when there was no mmacosx-version-min handling, or that was
considered unreliable.

We have version-specific specs for the values that have configuration
data, and the version is set in the driver (so may be considered
reliably present).

Some of the 'darwinN.h' content has become dead code, and the reminder
is either conditionalised on version information (or is setting values
used as fall-backs in cross-compilations).

With the changes needed for Darwin20 / macOS 11 the 'darwnN.h' headers
are now too unwieldy to be useful - so this series moves the relevant
specs definitons to the common 'darwin.h' header and then finally uses
the config.gcc script to supply the fall-back defaults for cross-
compilations.

We can then delete all but the main header, since the darwinN.h are
unused.

This change moves a spec from darwin10.h to the main darwin.h
target header.

gcc/ChangeLog:

	* config/darwin10.h (LINK_GCC_C_SEQUENCE_SPEC): Move the spec
	for the Darwin10 unwinder stub from here ...
	* config/darwin.h (LINK_COMMAND_SPEC_A): ... to here.

The toolchain now requires a C++11 compiler to bootstrap and
none of the older Darwin toolchains which were based on stabs
debugging are suitable.  We can simplify the debug setup now.

gcc/ChangeLog:

	* config/darwin.h (DSYMUTIL_SPEC): Default to DWARF
	(ASM_DEBUG_SPEC):Only define if the assembler supports
	stabs.
	(PREFERRED_DEBUGGING_TYPE): Default to DWARF.
	(DARWIN_PREFER_DWARF): Define.
	* config/darwin9.h (PREFERRED_DEBUGGING_TYPE): Remove.
	(DARWIN_PREFER_DWARF): Likewise
	(DSYMUTIL_SPEC): Likewise.
	(COLLECT_RUN_DSYMUTIL): Likewise.
	(ASM_DEBUG_SPEC): Likewise.
	(ASM_DEBUG_OPTION_SPEC): Likewise.

	* cfg.c (free_block): ggc_free bb.

	* cp-tree.h (cp_tree_c_finish_parsing): Declare.
	* decl2.c (c_parse_final_cleanups): Call cp_tree_c_finish_parsing.
	* tree.c (cp_tree_c_finish_parsing): New function.

Patch from Andreas Schwab.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/281000

In libgo it's referenced from os_gccgo.go on all platforms.

Fixes go/98496

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/280999

Add support (mostly dummy support) for GOARCH values supported by
gofrontend but not gc.  Fix PPC handling.

Fixes https://gcc.gnu.org/PR98493

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/280932

An invalid declaration of a CLASS instance can lead to an internal state
with inconsistent attributes during parsing that needs to be handled with
sufficient care when processing subsequent statements.  Avoid a lookup of
the vtab entry for such cases.

gcc/fortran/ChangeLog:

	* class.c (gfc_find_vtab): Add check on attribute is_class.

Manual part of copyright year updates.

2021-01-01  Jakub Jelinek  <jakub@redhat.com>

gcc/
	* gcc.c (process_command): Update copyright notice dates.
	* gcov-dump.c (print_version): Ditto.
	* gcov.c (print_version): Ditto.
	* gcov-tool.c (print_version): Ditto.
	* gengtype.c (create_file): Ditto.
	* doc/cpp.texi: Bump @copying's copyright year.
	* doc/cppinternals.texi: Ditto.
	* doc/gcc.texi: Ditto.
	* doc/gccint.texi: Ditto.
	* doc/gcov.texi: Ditto.
	* doc/install.texi: Ditto.
	* doc/invoke.texi: Ditto.
gcc/ada/
	* gnat_ugn.texi: Bump @copying's copyright year.
	* gnat_rm.texi: Likewise.
gcc/d/
	* gdc.texi: Bump @copyrights-d year.
gcc/fortran/
	* gfortranspec.c (lang_specific_driver): Update copyright notice
	dates.
	* gfc-internals.texi: Bump @copying's copyright year.
	* gfortran.texi: Ditto.
	* intrinsic.texi: Ditto.
	* invoke.texi: Ditto.
gcc/go/
	* gccgo.texi: Bump @copyrights-go year.
libgomp/
	* libgomp.texi: Bump @copying's copyright year.
libitm/
	* libitm.texi: Bump @copying's copyright year.
libquadmath/
	* libquadmath.texi: Bump @copying's copyright year.

Can't be committed together with the previous one due to the ChangeLog vs.
other files restrictions.

2021-01-01  Jakub Jelinek  <jakub@redhat.com>

gcc/
	* ChangeLog-2020: Rotate ChangeLog.  New file.
gcc/ada/
	* ChangeLog-2020: Rotate ChangeLog.  New file.
gcc/cp/
	* ChangeLog-2020: Rotate ChangeLog.  New file.
gcc/d/
	* ChangeLog-2020: Rotate ChangeLog.  New file.
gcc/fortran/
	* ChangeLog-2020: Rotate ChangeLog.  New file.
gcc/testsuite/
	* ChangeLog-2020: Rotate ChangeLog.  New file.
libgfortran/
	* ChangeLog-2020: Rotate ChangeLog.  New file.
libstdc++-v3/
	* ChangeLog-2020: Rotate ChangeLog.  New file.

The tests use -mfp16-format=alternative, and so should not be run
if that option isn't supported.


for  gcc/testsuite/ChangeLog

	* lib/target-supports.exp
	(check_effective_target_arm_fp16_alternative_ok_nocache):
	Return zero for *-*-vxworks7r* targets.
	* gcc.target/arm/aapcs/vfp22.c: Require arm_fp16_alternative_ok.
	* gcc.target/arm/aapcs/vfp23.c: Likewise.
	* gcc.target/arm/aapcs/vfp24.c: Likewise.
	* gcc.target/arm/aapcs/vfp25.c: Likewise.

This test fails during the execution on VxWorks 7 when using
C++-14 and C++-17.


for  gcc/testsuite/ChangeLog

	* g++.dg/init/new26.C: Fix overriding of the delete operator
	for c++14 profile.

The only TLS model supported in VxWorks kernel mode is local-exec.


for  gcc/testsuite/ChangeLog

	* g++.dg/tls/pr79288.C: Skip on vxworks_kernel (TLS model
	not supported).

If the target is configured such that -mlong-call is passed
by default, the function calls these tests are trying to detect
by scanning the assembly file are performed using long calls,
like so:

    | foo:
    |     @ memset-inline-2.c:12:   memset (a, -1, 14);
    |         mov     r2, #14 @,
    |         mvn     r1, #0  @,
    |         ldr     r0, .L2 @,
    |         ldr     r3, .L2+4       @ tmp112,
    |         bx      r3              @ tmp112

Looking at .L2 (and in particular at .L2+4):

    | .L2:
    |         .word   a
    |         .word   memset   <<<---

This change adds -mno-long-calls to the list of compiler options
to make sure we generate short call code, allowing the assembly
matching to pass.

This is added unconditionally to the dg-options (as opposed to using
dg-additional-options) because this test is already specific to ARM
targets, and -mno-long-calls is available on all ARM targets.


for  gcc/testsuite/ChangeLog

	* gcc.target/arm/memset-inline-2.c: Add -mno-long-calls to
	the test's dg-options.
	* gcc.target/arm/pr78255-2.c: Likewise.

The conflicting definition of OK is present in VxWorks RTP headers too.


for  gcc/testsuite/ChangeLog

	* g++.old-deja/g++.mike/p658.C: Also undefine OK on VxWorks RTP.

In VxWorks 7, UINT32 is defined in both modes, kernel and rtp.  Adjust
the work around accordingly.


for  gcc/testsuite/ChangeLog

	* g++.dg/opt/20050511-1.C: Work around UINT32 in vxworks rtp
	headers too.

Linking in vxworks kernel-mode is partial linking, so missing symbols
are not detected.


for  gcc/testsuite/ChangeLog

	* g++.old-deja/g++.pt/const2.C: Skip on vxworks kernel.

These are no longer applicable.


for  gcc/testsuite/ChangeLog

	* g++.dg/warn/miss-format-1.C: Remove vxworks-specific test
	directives.

VxWorks headers define ERROR as a macro, which conflicts with the use
in the test.


for  gcc/testsuite/ChangeLog

	* g++.dg/tree-ssa/copyprop.C: Undefine ERROR if defined.

The vxworks kernel-mode linking is partial linking, so it cannot
detect missing symbols.


for  gcc/testsuite/ChangeLog

	* g++.dg/other/anon5.C: Skip on vxworks kernel.

Adjust vxworks initpri expectations, given that vxworks7 has switched
to .init_array.


for  gcc/testsuite/ChangeLog

	* gcc.dg/vxworks/initpri1.c: Tigthen VxWorks version check.
	* gcc.dg/vxworks/initpri2.c: Likewise.

This test currently fails on VxWorks 7 SR06x0 targets when in kernel
mode, because it expects a discrepancy between built-in and system
intmax_t for all VxWorks targets when in kernel mode.  Fortunately,
this has now been fixed when targetting VxWorks 7 SR06x0, so this
commit adjusts the "dg-error" condition to exclude newer versions of
VxWorks 7.

for  gcc/testsuite/ChangeLog

	* gcc.dg/intmax_t-1.c: Do not expect an error on *-*-vxworks7r*
	targets.

Match xfail on kernel instead of rtp mode.


for  gcc/testsuite/changeLog

	* gcc.dg/pthread-init-1.c: Fix the VxWorks xfail filters.
	* gcc.dg/pthread-init-2.c: Ditto.

Explicitly disable some vxworks-missing features in the testsuite, that
the current feature tests detect as present.


for  gcc/testsuite/ChangeLog

	* lib/target-supports.exp (check_weak_available,
	check_fork_available, check_effective_target_lto,
	check_effective_target_mempcpy): Add vxworks filters.

The implicit -mlong-calls used in our vxworks configurations changes
the call sequences from those expected in the mve_libcall testcases.

This patch brings the test output in line with the expectations, with
an explicit -mno-long-calls.


for  gcc/testsuite/ChangeLog

	* gcc.target/arm/mve/intrinsics/mve_libcall1.c: Pass an
	explicit -mno-long-calls.
	* gcc.target/arm/mve/intrinsics/mve_libcall2.c: Likewise.

The implicit -mlong-calls from our vxworks configurations makes the
tail-call instructions differ from those expected by the
no_unique_address tests in gcc.target/arm.

This patch adds -mno-long-calls to the compilation commands, so that
we generate the expected sequences.


for  gcc/testsuite/ChangeLog

	* g++.target/arm/no_unique_address_1.C: Add -mno-long-calls.
	* g++.target/arm/no_unique_address_2.C: Likewise.

The headmerge tests pass a constant to conditional calls, so that the
same constant is always passed to a function, though it's a different
function depending on which path is taken.

The test checks that the constant appears only once in the assembly
output, as a means to verify that the insns setting up the argument
are unified: they appear as separate insns up to jump2, where
crossjump identifies a common prefix to all conditional paths and
unifies them.

Alas, with -mlong-calls, that we enable in our arm-vxworks
configurations, the argument register is loaded after loading the
callee address into another register.  Since each path calls a
different function, there's no common initial code sequence for
crossjump to unify, and the argument register set up remains separate,
so the test fails.

Though it would surely be desirable for the compiler to perform the
unification of the argument register setting up, this patch merely
avoids the effects of -mlong-calls, with an explicit -mno-long-calls.


for  gcc/testsuite/ChangeLog

	* gcc.target/arm/headmerge-1.c: Add -mno-long-calls.
	* gcc.target/arm/headmerge-2.c: Likewise.

The implicit -mlong-calls used in our arm-vxworks configurations
changes the register allocation patterns in the arm/fp16-aapcs-2.c
test: r3 ends up used in the long-call sequence, and we end up using
ip as a temporary, which doesn't match the expected mov patterns.

This patch adds an explicit -mno-long-calls for the generated code to
match the expectation.


for  gcc/testsuite/ChangeLog

	* gcc.target/arm/fp16-aapcs-2.c: Use -mno-long-calls.

On some targets, there are no < 8191; and >= 8191; strings,
but < 8191) and >= 8191), so just remove the ; from the regexps.

2021-01-01  Jakub Jelinek  <jakub@redhat.com>

	PR testsuite/98489
	PR tree-optimization/56719
	* gcc.dg/tree-ssa/pr56719.c: Remove semicolon from
	scan-tree-dump-times regexps.