Also re-enable simple IPv4 multicast testing on windows.

R=alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/5605048

It's no longer generated by make.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5602047

On Plan 9 this flag is used to discover
constant expressions in "if" statements.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5601060

Plan 9's tr(1) doesn't accept the C-style escapes
for tab and newline characters.  I was going to use
the \xFF hexadecimal escapes but GNU tr(1) doesn't
accept those.  It seems octal is the least common
denominator.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5576079

Previously, I had made available a tarball of
the modified system headers that were necessary
to build on Plan 9 but that was only a stopgap.
I think this method is much better since no
files outside of $GOROOT will have to be added
or modified during the build process.

Also, this is just the first step. I'll change
the build to reference these files in another CL
(that also contains a few more Makefile changes).

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5552056

This can drastically reduce the number of system
calls made by programs that repeatedly query the
environment.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5599054

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5576080

Ignore result of setting SO_BROADCAST.

Disable TestSimpleListenMulticastUDP as
setIPv4MulticastInterface is not implemented.

R=golang-dev, bradfitz, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/5610044

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5605046

Print all the syntax errors.  Fixes issue 2811.

Change Windows binary removal strategy.
This should keep the temporary files closer to
the binaries they are for, which will make it
more likely that the rename is not cross-device
and also make it easier to clean them up.
Fixes #2604 (as much as we can).

The standard build does not use the go command
to install the go command anymore, so issue 2604
is less of a concern than it originally was.
(It uses the go_bootstrap command to install
the go command.)

Buffer 'go list' output.

R=golang-dev, bradfitz, r
CC=golang-dev
https://golang.org/cl/5604048

Don't throw away factory functions returning error or rune.

Fixes #2820.

R=rsc
CC=golang-dev
https://golang.org/cl/5604046

Black box test is too time-consuming, as the bug
does not appear until Scan has processed 2 GB of
input in total across multiple calls, so no test.

Thanks to Frederick Mayle for the diagnosis and fix.

Fixes #2809.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5611043

Both are unused and undocumented.

InvalidConnError is also non-idiomatic: a FooError type can
typically describe something, else it would be an ErrFoo
variable.

R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/5609045

Do not treat $GOROOT/src/pkg, $GOROOT/src/cmd,
$GOPATH/src as package directories (only subdirectories
of those can be package directories).  Fixes issue 2602.

Accept additional compiler and linker arguments during
cgo from $CGO_CFLAGS and $CGO_LDFLAGS, as the
Makefiles used to do.

Show failed pkg-config output.  Fixes issue 2785.

Use different (perhaps better) git commands.  Fixes issue 2109.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5605045

Fixes #2664.

R=rsc
CC=golang-dev, remy
https://golang.org/cl/5593047

R=ken2
CC=golang-dev
https://golang.org/cl/5609044

Fixes #2753.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5609043

The type being unavailable on Windows was the only API
signature difference in the net package.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5608043

Print build errors to stderr during 'go run'.
Stream test output during 'go test' (no args).  Fixes issue 2731.
Add go test -i to install test dependencies.  Fixes issue 2685.
Fix data race in exitStatus.  Fixes issue 2709.
Fix tool paths.  Fixes issue 2817.

R=golang-dev, bradfitz, n13m3y3r, r
CC=golang-dev
https://golang.org/cl/5591045

The previous logic was mainly non-working. It only needs to
ensure that the go tool doesn't try to build the standard
library with gccgo.

R=golang-dev, rsc
CC=golang-dev, remy
https://golang.org/cl/5580051

- enable AllMethods flag (default: not set)
- fix logic determining which methods to show
- added respective test case in testdata/e.go for AllMethods = false
- added test case set for AllMethods = true

The critical changes/files to look at are:
- testdata/e{0,1,2}.golden: T4.M should only show up as method of T5 in e2.golden
- reader.go: always include top-level methods, and negate former logic for embedded methods
  (rewrote as a switch for better comprehensability)

Fixes #2791.

R=rsc, rsc
CC=golang-dev
https://golang.org/cl/5576057

This fixes some test noise in TestStressSurpriseServerCloses when
ulimit -n something low, like 256 on a Mac.

Previously, when the server closed on us and we were expecting more
responses (like we are in that test), we'd read an "Unexpected EOF"
and just forget about the client's net.Conn.  Now it's closed,
rather than waiting on the finalizer to release the fd.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5602043

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5603043

I missed an overflow in contract because I suspected that the prime
elimination would take care of it. It didn't, and I forgot to get back
to the overflow. Because of this, p224Contract may have produced a
non-minimal representation, causing flakey failures ~0.02% of the
time.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5592045

This CL introduces new function ListenMulticastUDP to fix
multicast UDP listening across multiple listeners issue,
to replace old multicast methods JoinGroup and LeaveGroup
on UDPConn.

This CL also enables multicast testing by default.

Fixes #2730.

R=rsc, paul.a.lalonde, fullung, devon.odell
CC=golang-dev
https://golang.org/cl/5562048

We support SSLv3 as a server but not as a client (and we don't want to
support it as a client). This change fixes the error message when
connecting to an SSLv3 server since SSLv3 support on the server side
made mutualVersion accept SSLv3.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5545073

TBR=mikioh
CC=golang-dev
https://golang.org/cl/5588048

Fixes #2792.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5590045

    If p->to.sym->text is non-nil, then no need to search for sym->value.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5601046

        5l -v is for benchmarking various parts of the loader, but this code in
        obj.c will clutter the output. I only comment them out, because this is
        on par with 8l/6l.

R=golang-dev
CC=golang-dev
https://golang.org/cl/5600046

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5552054

A go build currently generates around 400MB of test output prior to
cleaning up. With this change we use a maximum of ~15MB.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5588044

R=rsc, r
CC=golang-dev
https://golang.org/cl/5593046

R=golang-dev, lvd
CC=golang-dev
https://golang.org/cl/5601058

Ensure that file descriptors have not already been leaked into our
environment - close any that are open at the start of the
TestExtraFiles test.

Also use the appropriate command for listing open files.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5574062

gccgo currently fails this test:

fixedbugs/bug402.go:12:9: error: floating point constant truncated to integer
fixedbugs/bug402.go:13:8: error: floating point constant truncated to integer

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5600050

This patch adds a hash seed to the Hmap struct.  Each seed is
initialized by runtime.fastrand1().  This is the first step of a
solution to issue 2630.  Fastrand1 still needs to be updated to provide
us with actually random bits.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5599046

R=golang-dev
CC=golang-dev
https://golang.org/cl/5600055

The new cross-compiling bin target was breaking
everything but the system where buildscript.sh ran.

TBR=golang-dev
CC=golang-dev
https://golang.org/cl/5598055

TBR=golang-dev
CC=golang-dev
https://golang.org/cl/5600054