PR go/69966
    syscall: Add new Getsockopt functions.
    
    Add GetsockoptICMPv6Filter, GetsockoptIPv6MTUInfo, GetsockoptUcred as
    appropriate.  These functions exist in the master library.
    
    For GCC PR 69966.

    Reviewed-on: https://go-review.googlesource.com/19960

From-SVN: r233747

    
    cgo should lock the M.
    
    
    See also https://golang.org/cl/18882 .
    
    Reviewed-on: https://go-review.googlesource.com/18883

From-SVN: r233670

    
    Reviewed-on: https://go-review.googlesource.com/19592

From-SVN: r233515

    
    This is a port of https://golang.org/cl/18150 to the gccgo runtime.
    
    The previous behaviour of installing the signal handlers in a separate
    thread meant that Go initialization raced with non-Go initialization if
    the non-Go initialization also wanted to install signal handlers.  Make
    installing signal handlers synchronous so that the process-wide behavior
    is predictable.
    
    Reviewed-on: https://go-review.googlesource.com/19494

From-SVN: r233393

	PR go/66904
    cmd/go: fix "#cgo pkg-config:" comments with gccgo
    
    Copy of https://golang.org/cl/18790 by Michael Hudson-Doyle.
    
    The unique difficulty of #cgo pkg-config is that the linker flags are recorded
    when the package is compiled but (obviously) must be used when the package is
    linked into an executable -- so the flags need to be stored on disk somewhere.
    As it happens cgo already writes out a _cgo_flags file: nothing uses it
    currently, but this change adds it to the lib$pkg.a file when compiling a
    package, reads it out when linking (and passes a version of the .a file with
    _cgo_flags stripped out of it to the linker). It's all fairly ugly but it works
    and I can't really think of any way of reducing the essential level of
    ugliness.
    
    Update golang/go#11739.
    GCC PR 66904.

    Reviewed-on: https://go-review.googlesource.com/19431

From-SVN: r233290

	PR go/69511
    runtime: change G gcstack_size field to size_t
    
    Because its address is passed to __splitstack_find, which expects size_t*.
    
    From Dominik Vogt in GCC PR 69511.
    
    Reviewed-on: https://go-review.googlesource.com/19429

From-SVN: r233260

	PR go/69537
    runtime: Don't refer to _end symbol in shared library.
    
    Fixes GCC PR 69357.
    
    Reviewed-on: https://go-review.googlesource.com/19362

From-SVN: r233235

    
    Reviewed-on: https://go-review.googlesource.com/19233

From-SVN: r233156

    
    Reviewed-on: https://go-review.googlesource.com/19200

From-SVN: r233110

    
    This fixes the long-standing bug in which the testing package misreports
    the file/line of an error.
    
    Reviewed-on: https://go-review.googlesource.com/19179

From-SVN: r233098

	PR 68980
    libgo/testsuite: portable ps usage in gotest
    
    gotest is using "ps" to list descendant sleep
    processes in its timeout handling, grepping
    the command name.
    
    We are currently using the "cmd" ps output
    formatter, which is non-portable. We should
    use "comm" which is part of the POSIX
    standard, and outputs only the command name
    and not the arguments.
    
    Fixes https://gcc.gnu.org/PR68980
    
    Reviewed-on: https://go-review.googlesource.com/18426

From-SVN: r232234

    
    This change updates mksysinfo.sh so it correctly
    includes the define NLA_HDRLEN in the syscall package.
    
    Fixes golang/go/#13629
    
    Reviewed-on: https://go-review.googlesource.com/17893

From-SVN: r231796

	PR go/61303
    runtime: don't overallocate in select code
    
    If we've already allocated an fd_set, don't allocate another one.
    
    Also, don't bother to read from rdwake if it wasn't returned in select.
    
    Fixes https://gcc.gnu.org/PR61303.
    
    Reviewed-on: https://go-review.googlesource.com/17243

From-SVN: r230922

	PR go/68496
    reflect: Allocate space for FFI functions returning a zero-sized type.
    
    The libffi library does not understand zero-sized types.  We represent
    them as a struct with a single field of type void.  If such a type is
    returned from a function, libffi will copy 1 byte of data.  Allocate
    space for that byte, although we won't use it.
    
    Fixes https://gcc.gnu.org/PR68496.

    Reviewed-on: https://go-review.googlesource.com/17175

From-SVN: r230776

	PR go/66378
    syscall: Fix initial offset value in syscall.Sendfile.
    
    Bug reported in https://gcc.gnu.org/PR66378.
    
    Reviewed-on: https://go-review.googlesource.com/17159

From-SVN: r230699

	PR go/65785
    net: don't run multicast listen test on nil interface in short mode
    
    This is a backport of https://golang.org/cl/17154.
    
    The gccgo bug report https://gcc.gnu.org/PR65785 points out that the
    multicast listen tests will use the network even with -test.short.
    Fix test by checking testing.Short with a nil interface.
    
    Reviewed-on: https://go-review.googlesource.com/17158

From-SVN: r230695

re PR go/66574 (Time is provided in millisecond precision instead of nanoseconds as described in go documentation)

	PR go/66574
    runtime: Use clock_gettime to get current time.
    
    Fetch the current time in nanoseconds, not microseconds, by using
    clock_gettime rather than gettimeofday.
    
    Update golang/go#11222.
    
    Fixes https://gcc.gnu.org/PR66574.
    
    Reviewed-on: https://go-review.googlesource.com/17156

From-SVN: r230694

	PR go/68072
    cmd/cgo: ignore vars with no name or type if they have a AttrSpecification
    
    Backport of master CL https://golang.org/cl/17151.
    
    Fixes https://gcc.gnu.org/PR/68072.
    
    Reviewed-on: https://go-review.googlesource.com/17152

From-SVN: r230685

    
    When using the go command built from gccgo to build and
    install a go tool, use the value from runtime GCCGOTOOLDIR as
    the install directory.
    
    This also fixes the output from 'go tool' when used with the
    gccgo-built go command, to only include the go tools and not
    other binaries found in the same directory.
    
    Reviewed-on: https://go-review.googlesource.com/16516

From-SVN: r230677

    
    Before Solaris 12 the sendfile function is found in -lsendfile, so look
    for it there.
    
    Solaris 12 adds some more types that use _in6_addr_t, that need to be
    edited in mksysinfo.
    
    Patch by Rainer Orth.
    
    Reviewed-on: https://go-review.googlesource.com/16779

From-SVN: r230132

	PR go/68255
    cmd/go: always use --whole-archive for gccgo packages
    
    This is a backport of https://golang.org/cl/16775.
    
    This is, in effect, what the gc toolchain does.  It fixes cases where Go
    code refers to a C global variable; without this, if the global variable
    was the only thing visible in the C code, the generated cgo file might
    not get pulled in from the archive, leaving the Go variable
    uninitialized.
    
    This was reported against gccgo as https://gcc.gnu.org/PR68255 .
    
    Reviewed-on: https://go-review.googlesource.com/16778

From-SVN: r230120

	PR go/66138
    reflect, encoding/json, encoding/xml: fix unexported embedded structs
    
    Bring in three changes from the master Go repository.  These changes
    will be in Go 1.6, but they are appropriate for gccgo now because they
    resolve a long-standing discrepancy between how gc and gccgo handle the
    PkgPath field for embedded unexported struct fields.  The core issue is
    described at https://golang.org/cl/7247.  This has been reported against
    gccgo as https://gcc.gnu.org/PR66138.
    
    The three changes being brought over are:
    
    https://golang.org/cl/14010
    
    reflect: adjust access to unexported embedded structs
    
    This CL changes reflect to allow access to exported fields and
    methods in unexported embedded structs for gccgo and after gc
    has been adjusted to disallow access to embedded unexported structs.
    
    Adresses #12367, #7363, #11007, and #7247.
    
    https://golang.org/cl/14011
    
    encoding/json: check for exported fields in embedded structs
    
    Addresses issue #12367.
    
    https://golang.org/cl/14012
    
    encoding/xml: check for exported fields in embedded structs
    
    Addresses issue #12367.
    
    Reviewed-on: https://go-review.googlesource.com/16723

From-SVN: r229907

    
    Only build net/hook_cloexec.go on GNU/Linux and FreeBSD, because those
    are the only systems with accept4.
    
    Add syscall/libcall_bsd.go to define sendfile for *BSD and Solaris.
    
    Revert tcpsockopt_solaris.go back to the earlier version, so that it
    works on Solaris 10.
    
    Always pass the address of a Pid_t value to TIOCGPGRP and TIOCSPGRP.
    
    Include <unistd.h> in runtime/go-varargs.c.
    
    Reviewed-on: https://go-review.googlesource.com/16719

From-SVN: r229880

    
    I managed to add a new --goarch option to gotest without noticing that
    the script already had one.  Worse, they set different variables.
    Remove the old option in favor of the new one.
    
    Reviewed-on: https://go-review.googlesource.com/16613

From-SVN: r229734

    
    Reviewed-on: https://go-review.googlesource.com/16588

From-SVN: r229711

    
    Reviewed-on: https://go-review.googlesource.com/16583

From-SVN: r229686

    
    Reviewed-on: https://go-review.googlesource.com/16580

From-SVN: r229676

    
    Attempt to fix a build bug report:
    
    ../../../../libgo/go/syscall/exec_linux.go:185:37: error: integer constant overflow
       _, err1 = raw_ioctl_ptr(sys.Ctty, TIOCSPGRP, unsafe.Pointer(&pgrp))
    
    Reviewed-on: https://go-review.googlesource.com/16539

From-SVN: r229674

    
    Reviewed-on: https://go-review.googlesource.com/16534

From-SVN: r229645

    
    When not using split stacks, libgo allocate large stacks for each
    goroutine.  On a 64-bit system, libgo allocates a maximum of 128G for
    the Go heap, and allocates 4M for each stack.  When the stacks are
    allocated from the Go heap, the result is that a program can only create
    32K goroutines, which is not enough for an active Go server.  This patch
    changes libgo to allocate the stacks using mmap directly, rather than
    allocating them out of the Go heap.  This change is only done for 64-bit
    systems when not using split stacks.  When using split stacks, the
    stacks are allocated using mmap directly anyhow.  On a 32-bit system,
    there is no maximum size for the Go heap, or, rather, the maximum size
    is the available address space anyhow.
    
    Reviewed-on: https://go-review.googlesource.com/16531

From-SVN: r229636

    
    Reviewed-on: https://go-review.googlesource.com/16527

From-SVN: r229624

    
    It is not needed due to the removal of the ctx field.
    
    Reviewed-on: https://go-review.googlesource.com/16525

From-SVN: r229616

    
    Type descriptors picked up a zero field because the gc map
    implementation used it.  However, it's since been dropped by the gc
    library.  It was never used by gccgo.  Drop it now in preparation for
    upgrading to the Go 1.5 library.
    
    Reviewed-on: https://go-review.googlesource.com/16486

From-SVN: r229546

    
    Change the type descriptor hash and equal functions from C code pointers
    to Go func values.  This permits them to be set to a Go function
    closure.  This is in preparation for the Go 1.5, so that we can use a
    closure for the hash/equal functions returned by the new reflect.ArrayOf
    function.
    
    Reviewed-on: https://go-review.googlesource.com/16485

From-SVN: r229541

This patch adds an easy way to write tests for expected multiline
output.  For example we can test carets and underlines for
a particular diagnostic with:

/* { dg-begin-multiline-output "" }
 typedef struct _GMutex GMutex;
                ^~~~~~~
   { dg-end-multiline-output "" } */

multiline.exp is used by prune.exp; hence we need to load it before
prune.exp via *load_gcc_lib* for the testsuites of the various
non-"gcc" support libraries (e.g. boehm-gc).

gcc/testsuite/ChangeLog:
	* lib/multiline.exp: New file.
	* lib/prune.exp: Load multiline.exp.
	(prune_gcc_output): Call into multiline.exp to handle any
	multiline output directives.
	* lib/libgo.exp: Load multiline.exp before prune.exp, using
	load_gcc_lib.

boehm-gc/ChangeLog:
	* testsuite/lib/boehm-gc.exp: Load multiline.exp before
	prune.exp, using load_gcc_lib.

libatomic/ChangeLog:
	* testsuite/lib/libatomic.exp: Load multiline.exp before
	prune.exp, using load_gcc_lib.

libgomp/ChangeLog:
	* testsuite/lib/libgomp.exp: Load multiline.exp before prune.exp,
	using load_gcc_lib.

libitm/ChangeLog:
	* testsuite/lib/libitm.exp: Load multiline.exp before prune.exp,
	using load_gcc_lib.

libvtv/ChangeLog:
	* testsuite/lib/libvtv.exp: Load multiline.exp before prune.exp,
	using load_gcc_lib.

From-SVN: r228655

	PR go/67874
    net, runtime: Call C library fcntl function rather than syscall.Syscall.
    
    Not all systems define a fcntl syscall; some only have fcntl64.
    
    Fixes GCC PR go/67874.
    
    Reviewed-on: https://go-review.googlesource.com/15497

From-SVN: r228576

    
    Reviewed-on: https://go-review.googlesource.com/14922

From-SVN: r228087

	PR go/67695
    mksysinfo.sh: Use = with test rather than ==.
    
    Fixes GCC PR 67695.

    Reviewed-on: https://go-review.googlesource.com/14858

From-SVN: r228064

    Reviewed-on: https://go-review.googlesource.com/13037

From-SVN: r228057

    
    If the compiler supports split-stack but we are using a gold linker that
    does not, as happens on PPC with current GCC but old gold, then we need
    to compile the Go code with -fno-split-stack to avoid a linker error
    avoid the inability to call from split-stack code to non-split-stack
    code.
    
    Reviewed-on: https://go-review.googlesource.com/14598

From-SVN: r227811