Only produce fat object files when requested

Author: antoyo

src/back/write.rs

@@ -52,16 +52,13 @@ pub(crate) fn codegen(
                 );
             }*/
 
-            // TODO: only emit if libgccjit is compiled with LTO enabled?
             if config.emit_bc || config.emit_obj == EmitObj::Bitcode {
                 let _timer = cgcx
                     .prof
                     .generic_activity_with_arg("GCC_module_codegen_emit_bitcode", &*module.name);
                 if lto_supported {
                     context.add_command_line_option("-flto=auto");
                     context.add_command_line_option("-flto-partition=one");
-                    // TODO(antoyo): remove since we don't want fat objects when it is for Bitcode only.
-                    context.add_command_line_option("-ffat-lto-objects");
                 }
                 context
                     .compile_to_file(OutputKind::ObjectFile, bc_out.to_str().expect("path to str"));