allow for non root options

Author: gabydd

build.zig

@@ -1091,6 +1091,9 @@ fn addDeps(
     const exe_options = b.addOptions();
     try config.addOptions(exe_options);
     step.root_module.addOptions("build_options", exe_options);
+    if (step.root_module.import_table.get("options") == null) {
+        step.root_module.addAnonymousImport("options", .{ .root_source_file = b.path("src/noop.zig") });
+    }
 
     // We maintain a list of our static libraries and return it so that
     // we can build a single fat static library for the final app.
@@ -1925,6 +1928,9 @@ fn addModuleDeps(
     step: *std.Build.Module,
     config: BuildConfig,
 ) !LazyPathList {
+    if (step.import_table.get("options") == null) {
+        step.addAnonymousImport("options", .{ .root_source_file = b.path("src/noop.zig") });
+    }
     // All object targets get access to a standard build_options module
     const exe_options = b.addOptions();
     try config.addOptions(exe_options);

src/noop.zig

@@ -10,7 +10,7 @@ const build_config = @import("build_config.zig");
 const root = @import("root");
 
 /// Stdlib-wide options that can be overridden by the root file.
-pub const options: type = if (@hasDecl(root, "ghostty_options")) root.ghostty_options else Options;
+pub const options: type = if (@hasDecl(root, "ghostty_options")) root.ghostty_options else if (@hasDecl(@import("options"), "ghostty_options")) @import("options").ghostty_options else Options;
 const Options = struct {
     pub const Renderer = switch (build_config.renderer) {
         .metal => Metal,