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+[[!meta copyright="Copyright © 2011, 2013 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!meta title="Enable Google Go programming (GCC: gccgo)"]]
+
+[[!tag open_issue_gcc]]
+
+Make the [Google Go programming language](http://golang.org/) available on
+GNU/Hurd in its [[GCC]] *gccgo* implementation, and enable Hurd-specific
+features.
+
+There is a [[!FF_project 263]][[!tag bounty]] on this task.
+
+---
+
+
+# Part I
+
+First, make the language functional, have its test suite pass without errors.
+
+
+## Original [[community/GSoC]] Task Description
+
+[[!inline pages=community/gsoc/project_ideas/gccgo feeds=no]]
+
+
+## `tschwinge/t/hurd/go`
+
+There is now a `tschwinge/t/hurd/go` branch in GCC's Git repository, where the
+Hurd port for Go is being polished.
+
+
+## `getcontext`/`makecontext`/`setcontext`/`swapcontext` usage analysis
+
+In context of [[glibc/t/tls-threadvar]].  Looking at GCC trunk commit
+f6568ea476aa52a6e23c6db43b3e240cde55783a (2013-04-26).
+
+The check in `libgo/configure.ac` *whether setcontext clobbers TLS variables*
+is invalid on GNU Hurd.
+
+The `*context` functions are used in `libgo/runtime/go-signal.c` and
+`libgo/runtime/proc.c`.
+
+`__splitstack_getcontext`, `__splitstack_setcontext`,
+`__splitstack_makecontext`, `__splitstack_resetcontext`,
+`__splitstack_block_signals_context` are to be provided by libgcc.  However, in
+said libgo runtime files, they're used only `#ifdef USING_SPLIT_STACK`.
+[[I|tschwinge]] would assume that before we can enable split stacks, first
+[[open_issues/glibc/t/tls-threadvar]] needs to be fixed.
+
+In `libgo/runtime/proc.c`:`runtime_gogo`, `setcontext` is used to *switch
+context to a different goroutine*.  TODO.
+
+In `libgo/runtime/proc.c`:`runtime_mcall`, which *save[s] context and call[s]
+fn passing g as a parameter*, `getcontext` and `setcontext` are used; this is
+only called from `libgo/runtime/proc.c`:`runtime_gosched`.  TODO.
+
+In `libgo/runtime/proc.c`:`runtime_tracebackothers`, `getcontext` is used to
+*switch context to the goroutine*.  TODO.
+
+In `libgo/runtime/proc.c`:`runtime_mstart`, which is *called to start an M*,
+`getcontext` is used.  TODO.
+
+In `libgo/runtime/proc.c`:`runtime_entersyscall`, which is called when *the
+goroutine g is about to enter a system call*, `getcontext` is used to *save the
+registers in the g structure so that any pointers held in registers will be
+seen by the garbage collector*.  Should be fine.
+
+In `libgo/runtime/proc.c`:`__go_go`, `getcontext` and `makecontext` are used.
+TODO.
+
+In `libgo/runtime/thread.c`:`runtime_minit`, which is *[c]alled to initialize a
+new m (including the bootstrap m)*, `ss.ss_sp` is set to a new stack retrieved
+via `libgo/runtime/proc.c:runtime_malg`, which *allocate[s] a new g, with a
+stack [...]*, and then `sigaltstack` is called.  TODO.
+
+    libgo/runtime/go-signal.c:  /* We are now running on the stack registered via sigaltstack.
+    libgo/runtime/go-signal.c:     and sigaltstack when the program starts.)  */
+    
+    libgo/runtime/proc.c:         vnewg->context.uc_stack.ss_sp = vsp;
+    libgo/runtime/proc.c:         vnewg->context.uc_stack.ss_sp += vspsize;
+    libgo/runtime/proc.c:         vnewg->context.uc_stack.ss_size = vspsize;
+
+Also, in `libgo/runtime/proc.c`:`runtime_newm`, `pthread_attr_setstacksize` is
+used, which we also can't support yet, for the same reason.
+
+
+========================
+
+**gccgo manages to get compiled and pass a fair amount of its tests, however its library is failing all but one of its tests.**
+
+Following are the results of the passing suite between the libgo tests run on linux (x86) and the Hurd:
+
+# the Hurd:
+
+    Test Run By root on Fri Jul 12 17:56:44 UTC 2013
+    Native configuration is i686-unknown-gnu0.3
+
+		    === libgo tests ===
+
+    Schedule of variations:
+        unix
+
+    ...
+
+		    === libgo Summary ===
+
+    # of expected passes		1
+    # of unexpected failures	130
+    /root/gcc_new/gccbuild/./gcc/gccgo version 4.9.0 20130606 (experimental) (GCC)
+
+# Linux results:
+
+    Test Run By fotis on Τρι 02 Ιούλ 2013 09:20:20 μμ EEST
+    Native configuration is i686-pc-linux-gnu
+
+		    === libgo tests ===
+
+    Schedule of variations:
+        unix
+
+    ...
+
+		    === libgo Summary ===
+
+    # of expected passes		131
+    /home/fotis/Software/gcc_build/./gcc/gccgo version 4.9.0 20130702 (experimental) (GCC)
+
+
+---
+
+
+# Part II
+
+Next, Hurd-specific features can be added.  Add an interface to the
+language/environment for being able to do [[RPC]] calls, in order to program
+[[hurd/translator]]s natively in the Google Go programming language.
+
+
+## Original [[community/GSoC]] Task Description
+
+[[!inline pages=community/gsoc/project_ideas/language_bindings feeds=no]]