--- /dev/null	2026-05-01 23:29:09.065906317 +0300
+++ ../src/lxqt_wallet_external.h	2026-05-02 23:57:16.865506071 +0300
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <QtGlobal>
+
+/*
+ * lxqt_wallet.h incorrectly uses Q_DECL_EXPORT in its public consumer header.
+ * With toolchains using protected visibility, this makes qCheckGMail emit
+ * protected undefined references, which GNU ld refuses to resolve from the
+ * external shared library.
+ *
+ * For consumers, these declarations must not be export/protected declarations.
+ */
+#pragma push_macro("Q_DECL_EXPORT")
+#undef Q_DECL_EXPORT
+#define Q_DECL_EXPORT Q_DECL_IMPORT
+#include <lxqt_wallet.h>
+#pragma pop_macro("Q_DECL_EXPORT")
--- ../src/util.hpp	2026-05-02 23:57:28.050242554 +0300
+++ ../src/util.hpp	2026-05-02 23:57:42.072699489 +0300
@@ -39,7 +39,7 @@
 #include <QEventLoop>
 #include <QProcess>
 
-#include "lxqt_wallet.h"
+#include "lxqt_wallet_external.h"
 
 static inline std::ostream& operator<<( std::ostream& cout,const QString& s )
 {
--- ../src/walletmanager.h	2026-05-02 23:57:31.554168826 +0300
+++ ../src/walletmanager.h	2026-05-02 23:57:47.451031404 +0300
@@ -41,7 +41,7 @@
 #include "configurationoptionsdialog.h"
 #include "gmailauthorization.h"
 
-#include "lxqt_wallet.h"
+#include "lxqt_wallet_external.h"
 #include "settings.h"
 
 namespace Ui {