From 74f09d5559a5fd0a1a73927d8ecaf8ffd76d9476 Mon Sep 17 00:00:00 2001
From: Matthew Knight <mattnite@proton.me>
Date: Sat, 30 May 2026 00:29:36 -0700
Subject: [PATCH 1/2] Zig 0.17.0-dev.420+8086ae176

---
 build.zig      |  8 +++-----
 src/serial.zig | 20 ++++++++++++--------
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/build.zig b/build.zig
index 2ffbe26..653ea85 100644
--- a/build.zig
+++ b/build.zig
@@ -12,14 +12,12 @@ pub fn build(b: *std.Build) void {
 
     const serial_mod = b.addModule("serial", .{
         .root_source_file = b.path("src/serial.zig"),
+        .target = target,
+        .optimize = optimize,
     });
 
     const unit_tests = b.addTest(.{
-        .root_module = b.createModule(.{
-            .root_source_file = b.path("src/serial.zig"),
-            .target = target,
-            .optimize = optimize,
-        }),
+        .root_module = serial_mod,
     });
     const run_unit_tests = b.addRunArtifact(unit_tests);
     const test_step = b.step("test", "Run unit tests");
diff --git a/src/serial.zig b/src/serial.zig
index cdd0e89..95bacf2 100644
--- a/src/serial.zig
+++ b/src/serial.zig
@@ -1,6 +1,6 @@
 const std = @import("std");
 const builtin = @import("builtin");
-const c = @cImport(@cInclude("termios.h"));
+//const c = @import("c");
 const Io = std.Io;
 
 pub fn list(io: Io) !PortIterator {
@@ -963,12 +963,16 @@ pub fn flushSerialPort(port: std.Io.File, flush: Flush) !void {
                 return error.FlushError;
         },
         .macos => {
+            const TCIFLUSH = 1;
+            const TCOFLUSH = 2;
+            const TCIOFLUSH = 3;
+            const tcflush = @extern(fn (c_int, c_int) c_int, .{ .name = "tcflush" });
             const mode: c_int = switch (flush) {
-                .input => c.TCIFLUSH,
-                .output => c.TCOFLUSH,
-                .both => c.TCIOFLUSH,
+                .input => TCIFLUSH,
+                .output => TCOFLUSH,
+                .both => TCIOFLUSH,
             };
-            if (0 != c.tcflush(port.handle, mode))
+            if (0 != tcflush(port.handle, mode))
                 return error.FlushError;
         },
         else => @compileError("unsupported OS, please implement!"),
@@ -1178,10 +1182,10 @@ test "basic configuration test" {
         else => unreachable,
     }
 
-    var port = std.Io.Dir.openFileAbsolute(std.testing.io, tty, .{ .mode = .read_write }) catch |err| switch(err) {
+    var port = std.Io.Dir.openFileAbsolute(std.testing.io, tty, .{ .mode = .read_write }) catch |err| switch (err) {
         error.FileNotFound => return error.SkipZigTest,
         else => |e| return e,
-    }; 
+    };
     defer port.close(std.testing.io);
 
     try configureSerialPort(port, cfg);
@@ -1196,7 +1200,7 @@ test "basic flush test" {
         .macos => tty = "/dev/cu.usbmodem101",
         else => unreachable,
     }
-    var port = std.Io.Dir.openFileAbsolute(std.testing.io, tty, .{ .mode = .read_write }) catch |err| switch(err) {
+    var port = std.Io.Dir.openFileAbsolute(std.testing.io, tty, .{ .mode = .read_write }) catch |err| switch (err) {
         error.FileNotFound => return error.SkipZigTest,
         else => |e| return e,
     };

From 0a31d48794752e1dfbf6dcfe8f4c646667d3ca6d Mon Sep 17 00:00:00 2001
From: Matthew Knight <mattnite@proton.me>
Date: Sat, 30 May 2026 00:30:51 -0700
Subject: [PATCH 2/2] Clenaup patch

---
 src/serial.zig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/serial.zig b/src/serial.zig
index 95bacf2..4443c8b 100644
--- a/src/serial.zig
+++ b/src/serial.zig
@@ -1,6 +1,5 @@
 const std = @import("std");
 const builtin = @import("builtin");
-//const c = @import("c");
 const Io = std.Io;
 
 pub fn list(io: Io) !PortIterator {