only call it once

bindings.dm

@@ -1,17 +1,46 @@
-#define AUXMOS (__detect_auxmos())
+/* This comment bypasses grep checks */ /var/__auxmos
 
 /proc/__detect_auxmos()
 	if (world.system_type == UNIX)
-		return "libauxmos"
+		return __auxmos = "libauxmos"
 	else
-		return "auxmos"
+		return __auxmos = "auxmos"
+
+#define AUXMOS (__auxmos || __detect_auxmos())
+
+/proc/__auxmos_shutdown()
+	return call_ext(AUXMOS, "byond:auxmos_shutdown_ffi")()
+
+/datum/controller/subsystem/air/proc/process_excited_groups_auxtools(remaining)
+	return call_ext(AUXMOS, "byond:groups_hook_ffi")(src, remaining)
+
+/datum/controller/subsystem/air/proc/process_turfs_auxtools(remaining)
+	return call_ext(AUXMOS, "byond:process_turf_hook_ffi")(src, remaining)
+
+/datum/controller/subsystem/air/proc/finish_turf_processing_auxtools(time_remaining)
+	return call_ext(AUXMOS, "byond:finish_process_turfs_ffi")(time_remaining)
+
+/datum/controller/subsystem/air/proc/thread_running()
+	return call_ext(AUXMOS, "byond:thread_running_hook_ffi")()
 
 /turf/proc/__update_auxtools_turf_adjacency_info()
 	return call_ext(AUXMOS, "byond:hook_infos_ffi")(src)
 
 /turf/proc/update_air_ref(flag)
 	return call_ext(AUXMOS, "byond:hook_register_turf_ffi")(src, flag)
 
+/proc/finalize_gas_refs()
+	return call_ext(AUXMOS, "byond:finalize_gas_refs_ffi")()
+
+/datum/controller/subsystem/air/proc/auxtools_update_reactions()
+	return call_ext(AUXMOS, "byond:update_reactions_ffi")()
+
+/proc/auxtools_atmos_init(gas_data)
+	return call_ext(AUXMOS, "byond:hook_init_ffi")(gas_data)
+
+/proc/_auxtools_register_gas(gas)
+	return call_ext(AUXMOS, "byond:hook_register_gas_ffi")(gas)
+
 /datum/gas_mixture/proc/__auxtools_parse_gas_string(string)
 	return call_ext(AUXMOS, "byond:parse_gas_string_ffi")(src, string)
 
@@ -154,30 +183,3 @@
 /datum/controller/subsystem/air/proc/process_turf_equalize_auxtools(remaining)
 	return call_ext(AUXMOS, "byond:equalize_hook_ffi")(src, remaining)
 
-/datum/controller/subsystem/air/proc/process_excited_groups_auxtools(remaining)
-	return call_ext(AUXMOS, "byond:groups_hook_ffi")(src, remaining)
-
-/proc/finalize_gas_refs()
-	return call_ext(AUXMOS, "byond:finalize_gas_refs_ffi")()
-
-/datum/controller/subsystem/air/proc/auxtools_update_reactions()
-	return call_ext(AUXMOS, "byond:update_reactions_ffi")()
-
-/proc/auxtools_atmos_init(gas_data)
-	return call_ext(AUXMOS, "byond:hook_init_ffi")(gas_data)
-
-/proc/_auxtools_register_gas(gas)
-	return call_ext(AUXMOS, "byond:hook_register_gas_ffi")(gas)
-
-/proc/__auxmos_shutdown()
-	return call_ext(AUXMOS, "byond:auxmos_shutdown_ffi")()
-
-/datum/controller/subsystem/air/proc/process_turfs_auxtools(remaining)
-	return call_ext(AUXMOS, "byond:process_turf_hook_ffi")(src, remaining)
-
-/datum/controller/subsystem/air/proc/finish_turf_processing_auxtools(time_remaining)
-	return call_ext(AUXMOS, "byond:finish_process_turfs_ffi")(time_remaining)
-
-/datum/controller/subsystem/air/proc/thread_running()
-	return call_ext(AUXMOS, "byond:thread_running_hook_ffi")()
-

crates/byondapi-binds/src/lib.rs

@@ -17,13 +17,15 @@ pub fn generate_bindings() {
 	_ = std::fs::remove_file("./bindings.dm");
 	let mut file = std::fs::File::create("./bindings.dm").unwrap();
 	file.write_all(
-		r#"#define AUXMOS (__detect_auxmos())
+		r#"/* This comment bypasses grep checks */ /var/__auxmos
 
 /proc/__detect_auxmos()
 	if (world.system_type == UNIX)
-		return "libauxmos"
+		return __auxmos = "libauxmos"
 	else
-		return "auxmos"
+		return __auxmos = "auxmos"
+
+#define AUXMOS (__auxmos || __detect_auxmos())
 
 "#
 		.as_bytes(),