move uni_btstack_version_compat to its own file

src/components/bluepad32/include/uni_btstack_version_compat.h

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright 2024 Ricardo Quesada
+// http://retro.moe/unijoysticle2
+
+#ifndef UNI_BTSTACK_VERSION_COMPAT_H
+#define UNI_BTSTACK_VERSION_COMPAT_H
+
+// btstack_version.h was included in v1.6.2
+#if defined __has_include
+#if __has_include(<btstack_version.h>)
+#include <btstack_version.h>
+#else
+#define BTSTACK_VERSION_MAJOR 1
+#define BTSTACK_VERSION_MINOR 6
+#define BTSTACK_VERSION_PATCH 1
+#define BTSTACK_VERSION_STRING "1.6.1"
+#endif
+#endif
+
+#endif  // UNI_BTSTACK_VERSION_COMPAT_H

src/components/bluepad32/parser/uni_hid_parser.c

@@ -5,6 +5,7 @@
 #include "parser/uni_hid_parser.h"
 
 #include "hid_usage.h"
+#include "uni_btstack_version_compat.h"
 #include "uni_hid_device.h"
 #include "uni_log.h"
 #include "uni_version.h"

src/components/bluepad32/uni_init.c

@@ -9,6 +9,7 @@
 #include "bt/uni_bt_allowlist.h"
 #include "bt/uni_bt_setup.h"
 #include "platform/uni_platform.h"
+#include "uni_btstack_version_compat.h"
 #include "uni_config.h"
 #include "uni_console.h"
 #include "uni_hid_device.h"
@@ -17,7 +18,10 @@
 #include "uni_version.h"
 #include "uni_virtual_device.h"
 
-int uni_init(int argc, const char** argv) {
+// Move it uni_common.
+#define UNI_CONCAT (str1, str2) str1 str2
+
+int uni_init(int argc, const char **argv) {
     // Disable stdout buffering
     setbuf(stdout, NULL);