Fixes #4976.

R=r
CC=golang-dev
https://golang.org/cl/7421050

R=golang-dev, adonovan, bradfitz, cw, patrick.allen.higgins, sameer, ugorji
CC=golang-dev
https://golang.org/cl/7373051

to reduce compile time memory/stack usage.
Update #4970
$ go test -c ../test/bench/go1
before:
0.36user 0.07system 0:00.44elapsed 100%CPU
(0avgtext+0avgdata 540720maxresident)k
0inputs+19840outputs (0major+56451minor)pagefaults 0swaps
after:
0.33user 0.05system 0:00.39elapsed 100%CPU
(0avgtext+0avgdata 289936maxresident)k
0inputs+19864outputs (0major+29615minor)pagefaults 0swaps

And stack usage is reduced to below 1MiB.

R=golang-dev, r, dave
CC=golang-dev
https://golang.org/cl/7436050

Fixes #4969

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7456049

Using -import_runtime_cgo would have worked great except
that it doesn't get passed to the second invocation of cgo,
and that's the one that writes the relevant file.

Fixes ARM build on systems with a different dynamic linker
than the one 5l assumes (like Gentoo).

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7432048

Use a 17 MB payload instead of a 1 MB payload, since
OS X can apparently buffer up to 16 MB in its pipes.

Fixes #4958 maybe

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7453049

Fixes #4941.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7415051

If the constant CollectStats is non-zero and GOGCTRACE=1
the garbage collector will print basic statistics about executed
GC instructions.

R=golang-dev, dvyukov
CC=golang-dev, rsc
https://golang.org/cl/7413049

Fixes #4882.
Fixes #4936.
Fixes #4937.

R=golang-dev, dave, daniel.morsing, rsc
CC=golang-dev
https://golang.org/cl/7432044

R=golang-dev, dvyukov
CC=golang-dev
https://golang.org/cl/7435053

Fixes #4932.

R=golang-dev, dave, rsc
CC=golang-dev
https://golang.org/cl/7437043

R=golang-dev, remyoudompheng, bradfitz
CC=golang-dev
https://golang.org/cl/7419049

Don't check out the repository if we're just going to fail everything.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7453048

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7450052

The old code would decode the palette only for 8-bit
images during a DecodeConfig.
This CL keeps the behavior for 8-bit images and sets
up the decoded palette also for 1, 2 and 4-bit images.

Fixes #4279.

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/7421048

Fixes the App Engine version of godoc. The other fix is to duplicate
this code inside appinit.go. I think initHandlers is the right place
to put the strings.Split call, as the notesToShow var is used by
docServer, which is what initHandlers sets up.

R=dsymonds
CC=golang-dev
https://golang.org/cl/7434044

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7423050

Fixes build on Plan 9 and Windows.

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7454049

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7429049

Also replaces testing.Errof with testing.Fatalf, make use of ICMP mock.

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/7308058

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/7433044

1. when executing a unsupported VFP instruction, the NetBSD kernel somehow
doesn't report SIGILL, and instead just spin and spin, we add a alarm(2)
to detect this case (albeit this is a kernel bug).
2. NetBSD/ARM's VFP11 support is not complete, so temporarily disable it.
3. The default gcc shipped with NetBSD-current mis-optimizes our code
at -O2, so lower the optimization level to -O1 on NetBSD/ARM.

R=dave, rsc
CC=golang-dev
https://golang.org/cl/7286044

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/7422055

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7420051

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7445050

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7450050

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7419048

They are moving to code.google.com/p/go.exp.
See also https://golang.org/cl/7463043

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7456047

Fixes #4826.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7434046

Fixes #4904.
The problem was that when the test runs the heap had grown to ~100MB,
so GC allows it to grow to 200MB, and so the test fails.
Moving the test to a separate process makes it much more isolated and stable.

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7441046

Fixes #4952.

R=alex.brainman
CC=golang-dev
https://golang.org/cl/7445046

More robustness in case of incorrect programs.

Fixes #4962.

R=dsymonds
CC=golang-dev
https://golang.org/cl/7429047

swig >= 2.0.9 requires the size of int values to be passed via a command line flag. Should swig complain about the -intgosize not being supported, then alert the user to their outdated version of swig.

Fixes #4756.

R=golang-dev, minux.ma, iant
CC=golang-dev
https://golang.org/cl/7331048

Replacement for CL 7370053 which attempted to make fallthrough's
syntactically a part of switch statements. Because they may be
labeled, fixing that CL completely would require too much spec
surgery.

Fixes #4923.

R=r, iant, rsc, ken
CC=golang-dev
https://golang.org/cl/7416048

Also make the crossover point an architecture-dependent constant,
although it's the same everywhere for now.

BenchmarkAppendStr1Byte            416          145  -65.14%
BenchmarkAppendStr4Bytes           743          217  -70.79%
BenchmarkAppendStr8Bytes           421          270  -35.87%
BenchmarkAppendStr16Bytes          415          403   -2.89%
BenchmarkAppendStr32Bytes          415          391   -5.78%

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7459044

Update #3679.

BenchmarkAppend1Byte            484          199  -58.88%
BenchmarkAppend4Bytes           829          286  -65.50%
BenchmarkAppend8Bytes           484          365  -24.59%
BenchmarkAppend16Bytes          484          498   +2.89%
BenchmarkAppend32Bytes          486          484   -0.41%

R=iant, dave, rsc
CC=golang-dev
https://golang.org/cl/7443047

Fixes #4961.

R=golang-dev, r, minux.ma
CC=golang-dev
https://golang.org/cl/7443048

Fixes #4945.
Most examples in this issue now better, but #10 is incomplete and I'm not
certain how to reproduce it. It actually looks like a go/types problem, since
the type being reported is coming directly from that package.
Please reopen the issue if you disagree.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7448046

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7450049

Update #4961.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7451044