From b82c5699ee0300b8547aa694967ff0f590352ed2 Mon Sep 17 00:00:00 2001
From: Sergey Fedorov <barracuda@macos-powerpc.org>
Date: Wed, 12 Aug 2026 19:20:14 +0000
Subject: [PATCH] Qt4: replace QCommandLineParser with a hand-rolled fallback

QCommandLineParser doesn't exist before Qt 5.2. Version-gate it: Qt5.2+
keeps using it unchanged, Qt4 falls back to parseServerOption(), a
small hand-rolled parser covering the same CLI surface this app
actually uses (-h/--help, -v/--version, -s/--server <name>), built on
QCoreApplication::arguments() which has existed since Qt4.0.
---
 src/main.cpp | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index 50c37b1..109e60d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -35,7 +35,9 @@ extern "C" {
 #if !defined(_WIN32) && !defined(PROJ_GNUTLS_DEBUG)
 #include <QMessageBox>
 #endif
+#if QT_VERSION >= QT_VERSION_CHECK(5, 2, 0)
 #include <QCommandLineParser>
+#endif
 #include <OcSettings.h>
 #include <QtSingleApplication>
 
@@ -46,6 +48,7 @@ extern "C" {
 
 #include <csignal>
 #include <cstdio>
+#include <cstdlib>
 
 static void log_callback(int level, const char* str)
 {
@@ -120,6 +123,40 @@ int pin_callback(void* userdata, int attempt, const char* token_url,
     return 0;
 }
 
+#if QT_VERSION < QT_VERSION_CHECK(5, 2, 0)
+/* QCommandLineParser doesn't exist before Qt 5.2; hand-roll the same
+ * tiny CLI surface (-h/--help, -v/--version, -s/--server <name>) for
+ * Qt4 instead. */
+static QString parseServerOption(const QCoreApplication& app)
+{
+    const QStringList args = app.arguments();
+    for (int i = 1; i < args.size(); ++i) {
+        const QString& arg = args.at(i);
+        if (arg == QLatin1String("-h") || arg == QLatin1String("--help")) {
+            std::printf("%s\n\n",
+                qPrintable(QObject::tr("OpenConnect is a VPN client, that utilizes TLS and DTLS "
+                                       "for secure session establishment, and is compatible "
+                                       "with many VPN protocols.")));
+            std::printf("Usage: %s [options]\n\n", qPrintable(args.at(0)));
+            std::printf("Options:\n");
+            std::printf("  -h, --help            Displays help on commandline options.\n");
+            std::printf("  -v, --version         Displays version information.\n");
+            std::printf("  -s, --server <name>   %s\n",
+                qPrintable(QObject::tr("auto-connect to existing profile <name>")));
+            ::exit(0);
+        } else if (arg == QLatin1String("-v") || arg == QLatin1String("--version")) {
+            std::printf("%s %s\n", qPrintable(app.applicationName()), qPrintable(app.applicationVersion()));
+            ::exit(0);
+        } else if (arg == QLatin1String("-s") || arg == QLatin1String("--server")) {
+            if (i + 1 < args.size()) {
+                return args.at(i + 1);
+            }
+        }
+    }
+    return QString();
+}
+#endif
+
 int main(int argc, char* argv[])
 {
     bool haveTray = false;
@@ -176,6 +213,7 @@ int main(int argc, char* argv[])
 #endif
     openconnect_init_ssl();
 
+#if QT_VERSION >= QT_VERSION_CHECK(5, 2, 0)
     QCommandLineParser parser;
     parser.setApplicationDescription(
         QObject::tr("OpenConnect is a VPN client, that utilizes TLS and DTLS "
@@ -192,6 +230,9 @@ int main(int argc, char* argv[])
     parser.process(app);
 
     const QString profileName{ parser.value(QLatin1String("server")) };
+#else
+    const QString profileName{ parseServerOption(app) };
+#endif
     MainWindow mainWindow(nullptr, haveTray, profileName);
     app.setActivationWindow(&mainWindow);
 #ifdef PROJ_PKCS11
-- 
2.43.0