libgo patch committed: Update to weekly.2012-01-20

[Rainer Orth]

Ian Lance Taylor <iant@google.com> writes:

> I have committed a patch to libgo to update to the weekly.2012-01-20
> release.  As usual this e-mail message only includes changes to files
> specific to gccgo.  Bootstrapped and ran Go testsuite on
> x86_64-unknown-linux-gnu.  Committed to mainline.

This patch (or the previous one, I haven't checked in detail) caused a
couple of problems on Solaris:

/vol/gcc/src/hg/trunk/local/libgo/go/syscall/exec_bsd.go:10:9: error: imported and not used: runtime

  Even after fixing all subsequent errors, runtime isn't used.

/vol/gcc/src/hg/trunk/local/libgo/go/syscall/exec_bsd.go:61:10: error: reference to undefined name 'raw_trace'

	// Enable tracing if requested.
	if sys.Ptrace {
		err1 = raw_trace(_PTRACE_TRACEME, 0, nil, nil)

  This needs to be raw_ptrace instead, it seems.

/vol/gcc/src/hg/trunk/local/libgo/go/syscall/exec_bsd.go:156:31: error: reference to undefined name 'F_CLOEXEC'

			raw_fcntl(nextfd, F_SETFD, F_CLOEXEC)

  This is rather spelled FD_CLOEXEC.

/vol/gcc/src/hg/trunk/local/libgo/go/syscall/exec_bsd.go:199:26: error: reference to undefined name 'IOTCNOTTY'

		_, err1 = raw_ioctl(0, IOTCNOTTY, 0)

  Doesn't exist either, typo for TIOCNOTTY, it seems.

/vol/gcc/src/hg/trunk/local/libgo/go/syscall/exec_bsd.go:207:13: error: not enough arguments

		_, err1 = raw_ioctl(TIOCSCTTY, 0)

  Missing 0 arg.

/vol/gcc/src/hg/trunk/local/libgo/go/os/sys_uname.go:11:1: error: redefinition of 'Hostname'

  Need hostname() here

/vol/gcc/src/hg/trunk/local/libgo/go/os/doc.go:15:1: note: previous definition of 'Hostname' was here
/vol/gcc/src/hg/trunk/local/libgo/go/os/doc.go:16:9: error: reference to undefined name 'hostname'

After those fixes, libgo builds again on Solaris 10/x86 and 11/SPARC.

On Solaris 8/x86, there's more:

/vol/gcc/src/hg/trunk/local/libgo/runtime/go-print.c: In function '__go_print_do
uble':
/vol/gcc/src/hg/trunk/local/libgo/runtime/go-print.c:61:3: error: implicit decla
ration of function 'isinf' [-Werror=implicit-function-declaration]
cc1: all warnings being treated as errors

  There's no isinf in system headers, I've chosen to use __builtin_isinf
  instead.

Undefined                       first referenced
 symbol                             in file
runtime_goenvs                      /var/gcc/regression/trunk/10-gcc/build/i386-pc-solaris2.10/libgo/.libs/libgo.so

  Currently defined in runtime/thread-linux.c only, need to add to
  thread-sema.c, too.

/vol/gcc/src/hg/trunk/local/libgo/go/net/sockoptip_linux.go:95:69: error: refere
nce to undefined identifier 'syscall.IP_PKTINFO'
make[4]: *** [net/net.lo] Error 1

  Provide fallback definition via mksysinfo.sh.

With those changes, libgo also builds on Solaris 8/x86 again, but lots
of undefined references to C99 math functions remain, so the result is
pretty useless.

I'm also checking IRIX 6.5 right now.

This patch is what I'm using for Solaris.

	Rainer


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Rainer Orth, Center for Biotechnology, Bielefeld University