add is_bindgen stub

src/jsc.zig

@@ -1,4 +1,6 @@
 // Top-level so it can access all files
+pub const is_bindgen = @import("std").meta.globalOption("bindgen", bool) orelse false;
+
 pub usingnamespace @import("./javascript/jsc/bindings/exports.zig");
 pub usingnamespace @import("./javascript/jsc/bindings/bindings.zig");
 pub usingnamespace @import("./javascript/jsc/base.zig");

src/jsc_stub.zig

@@ -1,4 +1,5 @@
 // For WASM builds
+pub const is_bindgen = true;
 pub const C = struct {};
 pub const WebCore = struct {};
 pub const Jest = struct {};

src/main.zig

@@ -23,6 +23,7 @@ pub const MainPanicHandler = panicky.NewPanicHandler(std.builtin.default_panic);
 const js = @import("javascript/jsc/bindings/bindings.zig");
 const JavaScript = @import("javascript/jsc/javascript.zig");
 pub const io_mode = .blocking;
+pub const bindgen = @import("build_options").bindgen;
 const Report = @import("./report.zig");
 pub fn panic(msg: []const u8, error_return_trace: ?*std.builtin.StackTrace) noreturn {
     MainPanicHandler.handle_panic(msg, error_return_trace);
@@ -30,6 +31,7 @@ pub fn panic(msg: []const u8, error_return_trace: ?*std.builtin.StackTrace) nore
 
 const CrashReporter = @import("crash_reporter");
 
+
 pub fn PLCrashReportHandler() void {
     Report.fatal(null, null);
 }