SPARCv9: stage1 panics when compiling multithreaded programs #9801
Description
On latest master (d2b5105 at the time of writing + my patch at #9800), Zig fails with the following error when trying to build multithreaded programs for Linux SPARC.
LLVM Emit Object... <unknown>:0: error: Undefined temporary symbol .Ltmp13
ld.lld: error: Thread.zig:799:(.text+0x5A36C0): unknown relocation (8) against symbol
thread 15381 panic: attempt to unwrap error: LLDReportedFailure
(at this point it just hangs)
Those are the example programs that can be used to reproduce the issue, just try building it with something like zig build-exe -target sparcv9-linux-gnu hello.zig:
(reproducible on any host arch, as far as I can tell)
// Multithreaded hello world, written normally
const std = @import("std");
fn hello() void {
std.debug.print("Hello world!\n", .{});
}
pub fn main() void {
const sc = std.Thread.SpawnConfig{
.stack_size = 1024,
};
const t = std.Thread.spawn(sc, hello, .{}) catch return;
t.join();
// Multithreaded hello world as a test case
const std = @import("std");
test "Hello!" {
const sc = std.Thread.SpawnConfig{
.stack_size = 1024,
};
const thread = try std.Thread.spawn(sc, hello, .{});
thread.join();
}
fn hello() void {
std.debug.print("Hello world!\n", .{});
}
The interesting thing is that in older commits (say, dd75302) the 2nd program would build and run cleanly, but the 1st one still fails with the same error.