Initial project import

tools/v/vlib/builtin/builtin_nix.c.v

@@ -0,0 +1,47 @@
+// Copyright (c) 2019-2024 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+module builtin
+
+@[markused]
+fn builtin_init() {
+	$if gcboehm ? {
+		$if !gc_warn_on_stderr ? {
+			gc_set_warn_proc(internal_gc_warn_proc_none)
+		}
+	}
+	$if !vinix {
+		unbuffer_stdout()
+	}
+}
+
+fn break_if_debugger_attached() {
+	unsafe {
+		mut ptr := &voidptr(0)
+		*ptr = nil
+	}
+}
+
+@[noreturn]
+pub fn panic_lasterr(base string) {
+	// TODO: use strerror_r and errno
+	panic(base + ' unknown')
+}
+
+// write_buf_to_console is a Windows-only helper; on non-Windows platforms
+// it is a no-op stub so that callers guarded by `$if windows { ... }` still
+// type-check on other targets.
+fn write_buf_to_console(fd int, buf &u8, buf_len int) bool {
+	return false
+}
+
+// write_buf_to_fd_kernel32 is a Windows-only helper for the minimal V2 PE path.
+// Keep a non-Windows stub so optional compile-time branches type-check while
+// bootstrapping V on other hosts.
+fn write_buf_to_fd_kernel32(fd int, buf &u8, buf_len int) bool {
+	return false
+}
+
+fn write_buf_to_fd_kernel32_or_exit(fd int, buf &u8, buf_len int) {}
+
+fn write_buf_to_fd_windows_non_minimal(fd int, buf &u8, buf_len int) {}