Tier 1 Support for sparc64-linux

[andrewrk]

A little humor:

<Thalheim> andrewrk: bootstrapping zig on sparc64 using the repo you posted peaks at consuming 104GB of memory on my machine, about 40% done so far
<floatcomplex> tell me you didn't try to build gcc with make -j256
<Thalheim> that's exactly what I did https://i.imgur.com/JvGpR51.png

Trying to build zig for this target gives:

[ 99%] Built target zig0
make[2]: Entering directory '/home/z/zig-bootstrap/out/build-zig-host'
Scanning dependencies of target zig_build_libstage2
make[2]: Leaving directory '/home/z/zig-bootstrap/out/build-zig-host'
make[2]: Entering directory '/home/z/zig-bootstrap/out/build-zig-host'
./lib/std/fs/file.zig:30:24: error: container 'std.os' has no member called 'mode_t'
    pub const Mode = os.mode_t;
                       ^
./lib/std/fs.zig:1284:19: note: referenced here
        mode: File.Mode = File.default_mode,
                  ^
./lib/std/io/buffered_atomic_file.zig:29:40: note: referenced here
        self.atomic_file = try fs.cwd().atomicFile(dest_path, .{});
                                       ^
./src-self-hosted/stage2.zig:370:21: note: referenced here
        const baf = try io.BufferedAtomicFile.create(fmt.allocator, file_path);
                    ^
./lib/std/time.zig:146:23: error: container 'std.os' has no member called 'timespec'
            var ts: os.timespec = undefined;
                      ^
./lib/std/fs/file.zig:164:18: error: container 'std.os' has no member called 'ino_t'
        inode: os.ino_t,
                 ^
./lib/std/fs/file.zig:182:38: note: referenced here
    pub fn stat(self: File) StatError!Stat {
                                     ^
./lib/std/fs/file.zig:142:25: note: referenced here
        return (try self.stat()).size;
                        ^
./lib/std/event/loop.zig:1244:25: error: container 'std.os' has no member called 'mode_t'
                mode: os.mode_t,
                        ^
./lib/std/event/loop.zig:1182:13: note: while checking this field
            open: Open,
            ^
./lib/std/event/loop.zig:1165:9: note: while checking this field
        msg: Msg,
        ^
./lib/std/linked_list.zig:200:13: note: while checking this field
            data: T,
            ^
./lib/std/atomic/queue.zig:10:9: note: while checking this field
        head: ?*Node,
        ^
./lib/std/event/loop.zig:1160:9: note: while checking this field
        fs_queue: std.atomic.Queue(Request),
        ^
./lib/std/event/loop.zig:16:5: note: while checking this field
    os_data: OsData,
    ^
./lib/std/event/loop.zig:96:25: note: referenced here
    pub const instance: ?*Loop = if (@hasDecl(root, "event_loop")) root.event_loop else default_instance;
                        ^
./lib/std/os.zig:614:41: note: referenced here
            EAGAIN => if (std.event.Loop.instance) |loop| {
                                        ^
./lib/std/fs.zig:598:42: error: container 'std.os' has no member called 'O_CLOEXEC'
        const os_flags = O_LARGEFILE | os.O_CLOEXEC | if (flags.write and flags.read)
                                         ^
./lib/std/fs.zig:777:53: error: container 'std.os' has no member called 'O_DIRECTORY'
            return self.openDirFlagsZ(sub_path_c, os.O_DIRECTORY | os.O_RDONLY | os.O_CLOEXEC | O_PATH);
                                                    ^
./lib/std/reset_event.zig:252:26: error: container 'std.os.linux' has no member called 'timespec'
            var ts: linux.timespec = undefined;
                         ^
./lib/std/os/linux.zig:138:12: error: use of undeclared identifier 'syscall3'
    return syscall3(
           ^
./lib/std/time.zig:183:19: error: container 'std.os' has no member called 'timespec'
        var ts: os.timespec = undefined;
                  ^
./lib/std/os.zig:909:74: error: use of undeclared identifier 'mode_t'
pub fn openatZ(dir_fd: fd_t, file_path: [*:0]const u8, flags: u32, mode: mode_t) OpenError!fd_t {
                                                                         ^
./lib/std/fs.zig:799:15: note: referenced here
            os.openatZ(self.fd, sub_path_c, flags, 0);
              ^
make[2]: *** [CMakeFiles/zig_build_libstage2.dir/build.make:57: CMakeFiles/zig_build_libstage2] Error 1
make[2]: Leaving directory '/home/z/zig-bootstrap/out/build-zig-host'
make[1]: *** [CMakeFiles/Makefile2:119: CMakeFiles/zig_build_libstage2.dir/all] Error 2
make[1]: Leaving directory '/home/z/zig-bootstrap/out/build-zig-host'

Behavior tests:

[nix-shell:~/dev/zig/build]$ ./zig test ../test/stage1/behavior.zig -target sparcv9-linux 
TODO buf_read_value_bytes packed struct big endian
/home/andy/dev/zig/src-self-hosted/stage2.zig:37:5: 0xb66c0c in stage2_panic (zigstage2)
    @panic(ptr[0..len]);
    ^
/home/andy/dev/zig/src/util.cpp:20:17: 0xb2641b in zig_panic (/home/andy/dev/zig/src/util.cpp)
    stage2_panic("", 0);
                ^
/home/andy/dev/zig/src/ir.cpp:28432:42: 0xaea1bc in buf_read_value_bytes (/home/andy/dev/zig/src/ir.cpp)
                                zig_panic("TODO buf_read_value_bytes packed struct big endian");
                                         ^
/home/andy/dev/zig/src/ir.cpp:28525:40: 0xaea6f3 in ir_analyze_bit_cast (/home/andy/dev/zig/src/ir.cpp)
        if ((err = buf_read_value_bytes(ira, ira->codegen, source_instr->source_node, buf, result->value)))
                                       ^
/home/andy/dev/zig/src/ir.cpp:18644:54: 0xac5147 in ir_resolve_result_raw (/home/andy/dev/zig/src/ir.cpp)
                bitcasted_value = ir_analyze_bit_cast(ira, &result_loc->source_instruction->base, value, dest_type);
                                                     ^
/home/andy/dev/zig/src/ir.cpp:18712:50: 0xac565f in ir_resolve_result (/home/andy/dev/zig/src/ir.cpp)
    IrInstGen *result_loc = ir_resolve_result_raw(ira, suspend_source_instr, result_loc_pass1, value_type,
                                                 ^
/home/andy/dev/zig/src/ir.cpp:29661:46: 0xaee29f in ir_analyze_instruction_end_expr (/home/andy/dev/zig/src/ir.cpp)
    IrInstGen *result_loc = ir_resolve_result(ira, &instruction->base.base, instruction->result_loc,
                                             ^
/home/andy/dev/zig/src/ir.cpp:30176:51: 0xaefb9b in ir_analyze_instruction_base (/home/andy/dev/zig/src/ir.cpp)
            return ir_analyze_instruction_end_expr(ira, (IrInstSrcEndExpr *)instruction);
                                                  ^
/home/andy/dev/zig/src/ir.cpp:30268:65: 0xaf00d3 in ir_analyze (/home/andy/dev/zig/src/ir.cpp)
        IrInstGen *new_instruction = ir_analyze_instruction_base(ira, old_instruction);
                                                                ^
/home/andy/dev/zig/src/ir.cpp:13205:38: 0xab1aee in ir_eval_const_value (/home/andy/dev/zig/src/ir.cpp)
    ZigType *result_type = ir_analyze(codegen, ir_executable, analyzed_executable,
                                     ^
/home/andy/dev/zig/src/ir.cpp:19455:43: 0xac7ddd in ir_analyze_fn_call (/home/andy/dev/zig/src/ir.cpp)
            if ((err = ir_eval_const_value(ira->codegen, exec_scope, body_node, result_ptr,
                                          ^
/home/andy/dev/zig/src/ir.cpp:19871:43: 0xac9a88 in ir_analyze_fn_call_src (/home/andy/dev/zig/src/ir.cpp)
    IrInstGen *result = ir_analyze_fn_call(ira, &call_instruction->base.base, fn_entry, fn_type, fn_ref,
                                          ^
/home/andy/dev/zig/src/ir.cpp:20052:42: 0xaca5a0 in ir_analyze_instruction_call (/home/andy/dev/zig/src/ir.cpp)
            return ir_analyze_fn_call_src(ira, call_instruction, fn_table_entry, fn_type,
                                         ^
/home/andy/dev/zig/src/ir.cpp:29954:47: 0xaef141 in ir_analyze_instruction_base (/home/andy/dev/zig/src/ir.cpp)
            return ir_analyze_instruction_call(ira, (IrInstSrcCall *)instruction);
                                              ^
/home/andy/dev/zig/src/ir.cpp:30268:65: 0xaf00d3 in ir_analyze (/home/andy/dev/zig/src/ir.cpp)
        IrInstGen *new_instruction = ir_analyze_instruction_base(ira, old_instruction);
                                                                ^
/home/andy/dev/zig/src/analyze.cpp:4832:44: 0xb3581b in analyze_fn_ir (/home/andy/dev/zig/src/analyze.cpp)
    ZigType *block_return_type = ir_analyze(g, fn->ir_executable,
                                           ^
/home/andy/dev/zig/src/analyze.cpp:4948:18: 0xb35dcb in analyze_fn_body (/home/andy/dev/zig/src/analyze.cpp)
    analyze_fn_ir(g, fn_table_entry, return_type_node);
                 ^
/home/andy/dev/zig/src/analyze.cpp:5060:28: 0xb365cc in semantic_analyze (/home/andy/dev/zig/src/analyze.cpp)
            analyze_fn_body(g, fn_entry);
                           ^
/home/andy/dev/zig/src/codegen.cpp:9662:25: 0xa7210e in gen_root_source (/home/andy/dev/zig/src/codegen.cpp)
        semantic_analyze(g);
                        ^
/home/andy/dev/zig/src/codegen.cpp:10766:28: 0xa7631c in codegen_build_and_link (/home/andy/dev/zig/src/codegen.cpp)
            gen_root_source(g);
                           ^
/home/andy/dev/zig/src/main.cpp:1741:39: 0xa49640 in main0 (/home/andy/dev/zig/src/main.cpp)
                codegen_build_and_link(g);
                                      ^
/home/andy/dev/zig/src/main.cpp:1819:24: 0xa49aa1 in main (/home/andy/dev/zig/src/main.cpp)
    auto result = main0(argc, argv);
                       ^
Aborted (core dumped)

Hello world:

[nix-shell:~/dev/zig/build]$ ./zig build-exe hello.zig -target sparcv9-linux
/home/andy/dev/zig/lib/std/start.zig:119:17: error: unsupported arch
        else => @compileError("unsupported arch"),
                ^
/home/andy/dev/zig/lib/std/event/loop.zig:1244:25: error: container 'std.os' has no member called 'mode_t'
                mode: os.mode_t,
                        ^
/home/andy/dev/zig/lib/std/event/loop.zig:1182:13: note: while checking this field
            open: Open,
            ^
/home/andy/dev/zig/lib/std/event/loop.zig:1165:9: note: while checking this field
        msg: Msg,
        ^
/home/andy/dev/zig/lib/std/linked_list.zig:200:13: note: while checking this field
            data: T,
            ^
/home/andy/dev/zig/lib/std/atomic/queue.zig:10:9: note: while checking this field
        head: ?*Node,
        ^
/home/andy/dev/zig/lib/std/event/loop.zig:1160:9: note: while checking this field
        fs_queue: std.atomic.Queue(Request),
        ^
/home/andy/dev/zig/lib/std/event/loop.zig:16:5: note: while checking this field
    os_data: OsData,
    ^
/home/andy/dev/zig/lib/std/event/loop.zig:96:25: note: referenced here
    pub const instance: ?*Loop = if (@hasDecl(root, "event_loop")) root.event_loop else default_instance;
                        ^
/home/andy/dev/zig/lib/std/os.zig:614:41: note: referenced here
            EAGAIN => if (std.event.Loop.instance) |loop| {
                                        ^
/home/andy/dev/zig/lib/std/fs/file.zig:164:18: error: container 'std.os' has no member called 'ino_t'
        inode: os.ino_t,
                 ^
/home/andy/dev/zig/lib/std/fs/file.zig:182:38: note: referenced here
    pub fn stat(self: File) StatError!Stat {
                                     ^
/home/andy/dev/zig/lib/std/fs/file.zig:142:25: note: referenced here
        return (try self.stat()).size;
                        ^
/home/andy/dev/zig/lib/std/reset_event.zig:252:26: error: container 'std.os.linux' has no member called 'timespec'
            var ts: linux.timespec = undefined;
                         ^
/home/andy/dev/zig/lib/std/os/linux.zig:785:60: error: use of undeclared identifier 'restore_rt'
    const restorer_fn = if ((act.flags & SA_SIGINFO) != 0) restore_rt else restore;
                                                           ^
/home/andy/dev/zig/lib/std/os/linux.zig:390:12: error: use of undeclared identifier 'syscall3'
    return syscall3(.write, @bitCast(usize, @as(isize, fd)), @ptrToInt(buf), count);
           ^
/home/andy/dev/zig/lib/std/os/linux.zig:777:12: error: use of undeclared identifier 'syscall4'
    return syscall4(.rt_sigprocmask, flags, @ptrToInt(set), @ptrToInt(oldset), NSIG / 8);
           ^
/home/andy/dev/zig/lib/std/os/linux.zig:773:43: error: use of undeclared identifier 'syscall0'
    return @bitCast(pid_t, @truncate(u32, syscall0(.gettid)));
                                          ^
/home/andy/dev/zig/lib/std/os/linux.zig:568:12: error: use of undeclared identifier 'syscall2'
    return syscall2(.tkill, @bitCast(usize, @as(isize, tid)), @bitCast(usize, @as(isize, sig)));
           ^
/home/andy/dev/zig/lib/std/os/linux.zig:555:9: error: use of undeclared identifier 'syscall1'
    _ = syscall1(.exit_group, @bitCast(usize, @as(isize, status)));
        ^
/home/andy/dev/zig/lib/std/fs.zig:598:42: error: container 'std.os' has no member called 'O_CLOEXEC'
        const os_flags = O_LARGEFILE | os.O_CLOEXEC | if (flags.write and flags.read)
                                         ^
/home/andy/dev/zig/lib/std/os/linux.zig:195:19: error: use of undeclared identifier 'SYS'
    if (@hasField(SYS, "mmap2")) {
                  ^

Building C hello world:

[nix-shell:~/dev/zig/build]$ ./zig build-exe --c-source hello.c -lc -target sparcv9-linux-gnu
error: unknown target CPU 'generic'
note: valid target CPU values are: v9, ultrasparc, ultrasparc3, niagara, niagara2, niagara3, niagara4

The following command failed:
/home/andy/dev/zig/build/zig clang -c -nostdinc -fno-spell-checking -target sparcv9-unknown-linux-gnu -isystem /home/andy/dev/zig/lib/include -isystem /home/andy/dev/zig/lib/libc/include/sparcv9-linux-gnu -isystem /home/andy/dev/zig/lib/libc/include/generic-glibc -isystem /home/andy/dev/zig/lib/libc/include/sparcv9-linux-any -isystem /home/andy/dev/zig/lib/libc/include/any-linux-any -Xclang -target-cpu -Xclang generic -Xclang -target-feature -Xclang -deprecated-v8,-detectroundchange,-fixallfdivsqrt,-hard-quad-float,-hasleoncasa,-hasumacsmac,-insertnopload,-leon,-leoncyclecounter,-leonpwrpsr,-no-fmuls,-no-fsmuld,-popc,-soft-float,-soft-mul-div,-v9,-vis,-vis2,-vis3 -MD -MV -MF zig-cache/tmp/JFSP-RvBOg9S-hello.o.d -g -fno-omit-frame-pointer -fsanitize=undefined -fsanitize-trap=undefined -D_DEBUG -Og -fstack-protector-strong --param ssp-buffer-size=4 -fPIC -o zig-cache/tmp/JFSP-RvBOg9S-hello.o hello.c

[zv-io]

If anyone needs SPARC hardware for testing, I can make some available. Andrew will put you in touch with me if necessary.

[koachan]

Pardon me for bumping this old thread, but is there any chance for a SPARC CI runner to happen?

[zv-io]

The machine referenced above is gcc102.fsffrance.org at the GCC Compile Farm: https://cfarm.tetaneutral.net/machines/list/.

Please let me know what (if anything) on the server side is needed to facilitate this.

[Richard-Rogalski]

I'm very interested in helping make this reality: Feel free to ping me for any help.

In the meantime, I'm going to play around and see what I can get working :)

[Beyley]

Theres a duplicate field here causing compile errors targetting sparc64 linux

Build Summary: 0/3 steps succeeded; 1 failed (disable with --summary none)
install transitive failure
└─ install zosu2011 transitive failure
   └─ zig build-exe zosu2011 Debug sparc64-linux 1 errors
C:\Users\ep1cm\Downloads\zig\lib\std\os\linux\sparc64.zig:448:5: error: duplicate struct field: 'sigmask'
    sigmask: sigset_t,
    ^~~~~~~
C:\Users\ep1cm\Downloads\zig\lib\std\os\linux\sparc64.zig:445:5: note: other field here
    sigmask: u64,
    ^~~~~~~
C:\Users\ep1cm\Downloads\zig\lib\std\os\linux\sparc64.zig:442:31: note: struct declared here
pub const ucontext_t = extern struct {
                       ~~~~~~~^~~~~~
referenced by:
    ucontext_t: C:\Users\ep1cm\Downloads\zig\lib\std\os\linux\sparc64.zig:442:31
    ucontext_t: C:\Users\ep1cm\Downloads\zig\lib\std\os\linux.zig:87:33
    remaining reference traces hidden; use '-freference-trace' to see all reference traces

should i open a separate issue for this?

[nektro]

no, open the pr directly and reference back to this. include the test program you got to pass and command you ran to test in the pr description

[alexrp]

The main blocker now is linking support. LLD seems to only have partial support for sparc64 (and none for sparc32).