Fixes #7292.

LGTM=dsymonds
R=dsymonds
CC=golang-codereviews
https://golang.org/cl/61650046

It was deleted from Vimeo. I will attempt to get a new version online.

Fixes #7297.

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/61740043

At present, when a package identifier is used outside of a selector expression, gc gives the error "use of package %S outside selector". However, in the selector expression x.f, the spec defines f as the selector. This change makes the error clearer.

Fixes #7133.

LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/50060047

Generated by addca.

R=gobot
CC=golang-codereviews
https://golang.org/cl/55870046

This got deleted mistakenly during the content re-org.

Fixes #7275.

LGTM=dvyukov
R=golang-codereviews, minux.ma, dvyukov
CC=golang-codereviews
https://golang.org/cl/60850043

(per suggestion by Doug McIlroy)

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/50580046

Fixes #7286.

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/61410044

LGTM=gri
R=golang-codereviews, gri
CC=golang-codereviews
https://golang.org/cl/61610043

R=r
CC=golang-codereviews
https://golang.org/cl/61650044

mp->mcache can be concurrently modified by runtime·helpgc.
In such case sigprof can remember mcache=nil, then helpgc sets it to non-nil,
then sigprof restores it back to nil, GC crashes with nil mcache.

R=rsc
CC=golang-codereviews
https://golang.org/cl/58860044

R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/60760048

Currently this leads to a significant skew towards 'etext' entry,
since all idle threads are profiled every tick.
Before:
Total: 66608 samples
   63188  94.9%  94.9%    63188  94.9% etext
     278   0.4%  95.3%      278   0.4% sweepspan
     216   0.3%  95.6%      448   0.7% runtime.mallocgc
     122   0.2%  95.8%      122   0.2% scanblock
     113   0.2%  96.0%      113   0.2% net/textproto.canonicalMIMEHeaderKey
After:
Total: 8008 samples
    3949  49.3%  49.3%     3949  49.3% etext
     231   2.9%  52.2%      231   2.9% scanblock
     211   2.6%  54.8%      211   2.6% runtime.cas64
     182   2.3%  57.1%      408   5.1% runtime.mallocgc
     178   2.2%  59.3%      178   2.2% runtime.atomicload64

LGTM=alex.brainman
R=golang-codereviews, alex.brainman
CC=golang-codereviews
https://golang.org/cl/61250043

LGTM=bradfitz
R=golang-codereviews, bradfitz, alex.brainman
CC=golang-codereviews
https://golang.org/cl/61260044

Fixes #7293.

Update #7261

The bsd ld(1) does not understand $ORIGIN and has restrictions on using -rpath when using clang(1), the default compiler on darwin.

LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/58480045

Fixes #7260.

Fix three broken tests in test.bash

The test for issue 4568 was confused by go $ACTION . producing a package root of "", avoiding this mode fixes the test but weakens the test.

The test for issue 4773 was broken on linux because math/Rand would fail to resolve as a package causing the test for duplicates to be skipped.

Finally, the last breakage was a small change in the error message.

Also, add test for foldDup.

LGTM=iant
R=iant, rsc
CC=golang-codereviews
https://golang.org/cl/61070044

LGTM=adg
R=adg
CC=golang-codereviews
https://golang.org/cl/60530049

rsc suggested that we split the whole linker changes into three parts.
This is the first one, mostly dealing with adding Hsolaris.

LGTM=iant
R=golang-codereviews, iant, dave
CC=golang-codereviews
https://golang.org/cl/54210050

LGTM=bradfitz
R=dave, bradfitz
CC=golang-codereviews
https://golang.org/cl/61310043

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/54300054

This changes makes sgen and clearfat use unaligned instructions for
the trailing bytes, like the runtime memmove does, resulting in faster
code when manipulating types whose size is not a multiple of 8.

LGTM=khr
R=khr, iant, rsc
CC=golang-codereviews
https://golang.org/cl/51740044

LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/60590047

LGTM=iant
R=golang-codereviews, dave, iant
CC=golang-codereviews
https://golang.org/cl/60740044

LGTM=minux.ma, dvyukov
R=golang-codereviews, minux.ma, dvyukov
CC=golang-codereviews
https://golang.org/cl/60900043

Use explicit SSE writes instead of REP STOSQ.

benchmark               old ns/op    new ns/op    delta
BenchmarkMemclr5               22            5  -73.62%
BenchmarkMemclr16              27            5  -78.49%
BenchmarkMemclr64              28            6  -76.43%
BenchmarkMemclr256             34            8  -74.94%
BenchmarkMemclr4096           112           84  -24.73%
BenchmarkMemclr65536         1902         1920   +0.95%

LGTM=dvyukov
R=golang-codereviews, dvyukov
CC=golang-codereviews
https://golang.org/cl/60090044

filepath.Base covers all scenarios
(for example paths like d:hello.txt)
on windows

LGTM=iant, bradfitz
R=golang-codereviews, iant, bradfitz
CC=golang-codereviews
https://golang.org/cl/59740050

This CL is in preparation to make cgo work on freebsd/arm.

The signedness of C char might be a problem when we make bare syscall
APIs, Go structures, using built-in bootstrap scripts with cgo because
they do translate C stuff to Go stuff internally. For now almost all
the C compilers assume that the type of char will be unsigned on arm
by default but it makes a different view from amd64, 386.

This CL just passes -fsigned-char, let the type of char be signed,
option which is supported on both gcc and clang to the underlying C
compilers through cgo for avoiding such inconsistency on syscall API.

LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/59740051

This CL is in preparation to make cgo work on freebsd/arm.

LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/59490051

This CL is in preparation to make cgo work on freebsd/arm.

It's just for fixing build fails on freebsd/arm, we still need to
update z-files later for fixing several package test fails.

How to generate z-files on freebsd/arm in the bootstrapping phase:
1. run freebsd on appropriate arm-eabi platforms
2. both syscall z-files and runtime def-files in the current tree are
   broken about EABI padding, fix them by hand
3. run make.bash again to build $GOTOOLDIR/cgo
4. use $GOTOOLDIR/cgo directly

LGTM=iant
R=iant, dave
CC=golang-codereviews
https://golang.org/cl/59490052

This CL is in preparation to make cgo work on freebsd/arm.

LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/60500044

This CL is in preparation to make cgo work on freebsd/arm.

How to generate defs-files on freebsd/arm in the bootstrapping phase:
1. run freebsd on appropriate arm-eabi platforms
2. both syscall z-files and runtime def-files in the current tree are
   broken about EABI padding, fix them by hand
3. run make.bash again to build $GOTOOLDIR/cgo
4. use $GOTOOLDIR/cgo directly

LGTM=minux.ma, iant
R=iant, minux.ma, dave
CC=golang-codereviews
https://golang.org/cl/59580045

Whitespace characters are allowed in quoted-string according to RFC 5322 without
being "Q"-encoding. Address.String() already always formats the name portion in
quoted string, so whitespace characters should be allowed in there.

Fixes #6641.

LGTM=dave, dsymonds
R=golang-codereviews, gobot, dsymonds, dave
CC=golang-codereviews
https://golang.org/cl/55770043

Fixes #7240.

LGTM=tommi.virtanen, bradfitz
R=golang-codereviews, tommi.virtanen, bradfitz
CC=golang-codereviews
https://golang.org/cl/60480045

I just added support for goto statements to my GopherJS project and now I am trying to get rid of my patches. These occurrences of goto however are a bit problematic:
GopherJS has to emulate gotos, so there is some performance drawback when doing so. In this case the drawback is major, since this is a core function of math/big which is called quite often. Additionally I can't see any reason here why the implementation with gotos should be preferred over my proposal.
That's why I would kindly ask to include this patch, even though it is functional equivalent to the existing code.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/55470046

So that we don't need to update the file each time a new version is released.

LGTM=dave, r, adg
R=golang-codereviews, dave, josharian, gobot, adg, r
CC=golang-codereviews
https://golang.org/cl/48730043

Introduce two new environment variables, CC_FOR_TARGET and CXX_FOR_TARGET.
CC_FOR_TARGET defaults to CC and is used when compiling for GOARCH, while
CC remains for compiling for GOHOSTARCH.
CXX_FOR_TARGET defaults to CXX and is used when compiling C++ code for
GOARCH.

CGO_ENABLED defaults to disabled when cross compiling and has to be
explicitly enabled.

Update #4714

LGTM=minux.ma, iant
R=golang-codereviews, minux.ma, iant, rsc, dominik.honnef
CC=golang-codereviews
https://golang.org/cl/57100043

Generated by addca.

TBR=iant
R=gobot
CC=golang-codereviews
https://golang.org/cl/52350044

Fixes #7034.

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/57140043

Fixes #7016.

LGTM=r
R=r
CC=adg, bradfitz, dave, golang-codereviews
https://golang.org/cl/60100043

Fixes #7117.

LGTM=gri
R=golang-codereviews, gobot, gri
CC=golang-codereviews
https://golang.org/cl/53310044

This reduces the ability to fingerprint TLS connections.

The impeteus for this change was a recent change to OpenSSL
by Nick Mathewson:

http://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=2016265dfb

LGTM=agl
R=agl
CC=golang-codereviews
https://golang.org/cl/57230043