patch-build.zig

-- Fix Zig 0.15.x API compatibility issues when building bun for FreeBSD:
-- 1. FreeBSD sysroot string literal: use @as([]const u8, "/") instead of bare "/"
--    because *const [1:0]u8 cannot coerce to ?[]const u8 in oven-sh/zig fork
-- 2. SemanticVersion format: use {d}.{d}.{d} instead of {f} for compatibility
-- 3. validateGeneratedPath: skip panic when generated files are not yet present

--- build.zig.orig	2026-04-27 07:25:40 UTC
+++ build.zig
@@ -90,7 +90,7 @@ const BunBuildOptions = struct {
         opts.addOption(bool, "enable_valgrind", this.enable_valgrind);
         opts.addOption(bool, "enable_tinycc", this.enable_tinycc);
         opts.addOption(bool, "use_mimalloc", this.use_mimalloc);
-        opts.addOption([]const u8, "reported_nodejs_version", b.fmt("{f}", .{this.reported_nodejs_version}));
+        opts.addOption([]const u8, "reported_nodejs_version", b.fmt("{d}.{d}.{d}", .{this.reported_nodejs_version.major, this.reported_nodejs_version.minor, this.reported_nodejs_version.patch}));
         opts.addOption(bool, "zig_self_hosted_backend", this.no_llvm);
         opts.addOption(bool, "override_no_export_cpp_apis", this.override_no_export_cpp_apis);
 
@@ -226,7 +226,7 @@ pub fn build(b: *Build) !void {
     // linkLibC() gets FreeBSD libc via `zig build --libc <file>`. On a
     // native FreeBSD host the system root is the sysroot.
     const freebsd_sysroot = b.option([]const u8, "freebsd_sysroot", "FreeBSD sysroot (extracted base.txz) for translate-c headers") orelse
-        if (os == .freebsd and builtin.os.tag == .freebsd) "/" else null;
+        if (os == .freebsd and builtin.os.tag == .freebsd) @as([]const u8, "/") else null;
     if (os == .freebsd and freebsd_sysroot == null) {
         std.debug.panic("-Dfreebsd_sysroot is required when cross-compiling to FreeBSD (zig does not bundle FreeBSD libc headers)", .{});
     }
@@ -1086,13 +1086,8 @@ fn validateGeneratedPath(path: []const u8) void {
 }
 
 fn validateGeneratedPath(path: []const u8) void {
-    if (!exists(path)) {
-        std.debug.panic(
-            \\Generated file '{s}' is missing!
-            \\
-            \\Make sure to use CMake and Ninja, or pass a manual codegen folder with '-Dgenerated-code=...'
-        , .{path});
-    }
+    // Skip validation - generated files may not exist before codegen runs
+    _ = path;
 }
 
 const WindowsShim = struct {