build: switch to zonfig

src/platform/pc/smp.zig

@@ -17,7 +17,7 @@ extern var AP_TRAMPOLINE_DATA: u8;
 extern var __percpu_start: u8;
 extern var __percpu_end: u8;
 
-pub export var cpu_id_to_apic_id: [config.CONFIG_NCPUS]u32 = undefined;
+pub export var cpu_id_to_apic_id: [config.ncpus]u32 = undefined;
 
 const start_stack = ke.ExportedCpuLocal(usize, 0, "ap_start_stack");
 

src/platform/root.zig

@@ -3,12 +3,11 @@
 
 const config = @import("config");
 
-pub const impl = if (@hasDecl(config, "CONFIG_ARCH_AMD64"))
-    @import("pc/impl.zig")
-else if (@hasDecl(config, "CONFIG_ARCH_UM"))
-    @import("um/impl.zig")
-else
-    @compileError("unsupported architecture");
+pub const impl = switch (config.arch) {
+    .amd64 => @import("pc/impl.zig"),
+    .um => @import("um/impl.zig"),
+    else => @compileError("unsupported architecture"),
+};
 
 pub const acpi = @import("acpi/root.zig");
 

src/platform/um/c.h

@@ -0,0 +1,9 @@
+#define _GNU_SOURCE 1
+#include <SDL.h>
+#include <pthread.h>
+#include <sched.h>
+#include <signal.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <ucontext.h>
+#include <unistd.h>

src/platform/um/entry.zig

@@ -3,12 +3,7 @@ const r = @import("root");
 pub const std_options = r.std_options;
 pub const panic = r.panic;
 
-const c = @cImport({
-    @cInclude("SDL.h");
-    @cInclude("signal.h");
-    @cInclude("pthread.h");
-});
-
+const c = @import("c");
 const std = @import("std");
 const ke = r.ke;
 const pl = r.pl;

src/platform/um/impl.zig

@@ -10,16 +10,7 @@ pub const entry = @import("entry.zig");
 
 const timer = @import("timer.zig");
 
-pub const c = @cImport({
-    @cDefine("_GNU_SOURCE", "1");
-    @cInclude("pthread.h");
-    @cInclude("sys/mman.h");
-    @cInclude("ucontext.h");
-    @cInclude("signal.h");
-    @cInclude("unistd.h");
-    @cInclude("sys/time.h");
-    @cInclude("sched.h");
-});
+pub const c = @import("c");
 
 pub const name = "User-Mode";