[RFC PATCH, go]: Port to ALPHA arch

[Uros Bizjak <ubizjak at gmail dot com>]

Hello!

Attached ports go to ALPHA architecture.

There are however several problems with the build:

a) Bootstrap compare failure in the gcc/go directory due to binutils
bug [1], fixed in latest binutils SVN, use --disable-bootstrap

b) alpha doesn't define "struct user_regs_struct" from which "type
PtraceRegs" is derived. I have manually created PtraceRegs from
pt_regs structure and patched generated libgo/sysinfo.go in build
directory after the build broke. However - the comment from sys/user.h
says that this file is for GDB and GDB only...

c) some weird issue with double definition of "const _SOCK_NONBLOCK"
in gen-sysinfo.go and consequently sysinfo.go.

The test results from "make -k check" in libgo directory are quite encouraging:

PASS: asn1
PASS: big
PASS: bufio
PASS: bytes
FAIL: cmath
panic: runtime error: integer divide by zero or floating point error
../../../gcc-svn/trunk/libgo/testsuite/gotest: line 356:  1637 Aborted
       ./a.out "$@"
PASS: ebnf
PASS: exec
PASS: expvar
PASS: flag
FAIL: fmt
mallocs per Sprintf(""): 1
mallocs per Sprintf("xxx"): 1
mallocs per Sprintf("%x"): 3
mallocs per Sprintf("%x %x"): 4
panic: runtime error: integer divide by zero or floating point error [recovered]
	panic: runtime error: integer divide by zero or floating point error
../../../gcc-svn/trunk/libgo/testsuite/gotest: line 356:  2309 Aborted
       ./a.out "$@"
PASS: gob
PASS: html
FAIL: http
../../../gcc-svn/trunk/libgo/testsuite/gotest: line 356:  3133 Segmentation faul
t      ./a.out "$@"
PASS: io
PASS: json
PASS: log
FAIL: math
panic: runtime error: integer divide by zero or floating point error
../../../gcc-svn/trunk/libgo/testsuite/gotest: line 356:  4321 Aborted
       ./a.out "$@"
PASS: mime
PASS: netchan
PASS: os
PASS: patch
PASS: path
PASS: rand
PASS: reflect
PASS: regexp
FAIL: rpc
2011/03/30 21:31:20 Test RPC server listening on 127.0.0.1:47781
2011/03/30 21:31:20 Test HTTP RPC server listening on 127.0.0.1:59606
2011/03/30 21:31:20 rpc.Serve: accept:accept tcp 127.0.0.1:47781: Resource tempo
rarily unavailable
FAIL: runtime
panic: runtime error: integer divide by zero or floating point error
../../../gcc-svn/trunk/libgo/testsuite/gotest: line 356:  5980 Aborted
       ./a.out "$@"
PASS: scanner
PASS: smtp
PASS: sort
FAIL: strconv
panic: runtime error: integer divide by zero or floating point error
../../../gcc-svn/trunk/libgo/testsuite/gotest: line 356:  6561 Aborted
       ./a.out "$@"
PASS: strings
PASS: sync
PASS: tabwriter
PASS: template
PASS: time
PASS: try
PASS: unicode
PASS: utf16
PASS: utf8
FAIL: websocket
2011/03/30 21:32:19 Test WebSocket server listening on 127.0.0.1:33252
--- FAIL: websocket.TestEcho (0.0 seconds)
	dialing dial tcp 127.0.0.1:33252: Connection refused
--- FAIL: websocket.TestEchoDraft75 (0.0 seconds)
	dialing dial tcp 127.0.0.1:33252: Connection refused
--- FAIL: websocket.TestWithQuery (0.0 seconds)
	dialing dial tcp 127.0.0.1:33252: Connection refused
--- FAIL: websocket.TestWithProtocol (0.0 seconds)
	dialing dial tcp 127.0.0.1:33252: Connection refused
--- FAIL: websocket.TestHTTP (0.0 seconds)
	Get: error &http.URLError{Op:"Get", URL:"http://127.0.0.1:33252/echo";, E
rror:(*net.OpError)(0xf840026d00)}
--- FAIL: websocket.TestHTTPDraft75 (0.0 seconds)
	Get: error &http.URLError{Op:"Get", URL:"http://127.0.0.1:33252/echoDraf
t75", Error:(*net.OpError)(0xf840026c40)}
panic: Dial failed: websocket.Dial ws://127.0.0.1:33252/echo: dial tcp 127.0.0.1
:33252: Connection refused
../../../gcc-svn/trunk/libgo/testsuite/gotest: line 356:  8493 Aborted
       ./a.out "$@"
PASS: xml
PASS: archive/tar
PASS: archive/zip
PASS: compress/bzip2
FAIL: compress/flate
../../../gcc-svn/trunk/libgo/testsuite/gotest: line 356:  9194 Segmentation faul
t      ./a.out "$@"
PASS: compress/gzip
PASS: compress/lzw
PASS: compress/zlib
PASS: container/heap
PASS: container/list
PASS: container/ring
PASS: container/vector
PASS: crypto/aes
PASS: crypto/block
PASS: crypto/blowfish
PASS: crypto/cipher
PASS: crypto/dsa
PASS: crypto/ecdsa
PASS: crypto/elliptic
PASS: crypto/hmac
PASS: crypto/md4
PASS: crypto/md5
PASS: crypto/ocsp
PASS: crypto/openpgp
PASS: crypto/rand
PASS: crypto/rc4
PASS: crypto/ripemd160
PASS: crypto/rsa
PASS: crypto/sha1
PASS: crypto/sha256
PASS: crypto/sha512
PASS: crypto/subtle
PASS: crypto/tls
PASS: crypto/twofish
PASS: crypto/x509
PASS: crypto/xtea
PASS: crypto/openpgp/armor
PASS: crypto/openpgp/packet
PASS: crypto/openpgp/s2k
PASS: debug/dwarf
PASS: debug/elf
PASS: debug/macho
PASS: debug/pe
PASS: encoding/ascii85
PASS: encoding/base32
PASS: encoding/base64
PASS: encoding/binary
PASS: encoding/git85
PASS: encoding/hex
PASS: encoding/line
PASS: encoding/pem
PASS: exp/datafmt
PASS: exp/draw
PASS: exp/eval
PASS: go/parser
PASS: go/printer
PASS: go/scanner
PASS: go/token
PASS: go/typechecker
PASS: hash/adler32
PASS: hash/crc32
PASS: hash/crc64
PASS: hash/fnv
PASS: http/cgi
PASS: image/png
PASS: index/suffixarray
PASS: io/ioutil
PASS: mime/multipart
PASS: net/textproto
PASS: os/signal
PASS: path/filepath
PASS: rpc/jsonrpc
PASS: sync/atomic
PASS: testing/quick
PASS: testing/script


[1] http://sourceware.org/bugzilla/show_bug.cgi?id=12610

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