termux-packages/x11-packages/libqtxdg/xdgdirs_termux_prefix.patch

--- src/src/qtxdg/xdgdirs.cpp	2021-04-16 09:29:21.000000000 +0000
+++ src.mod/src/qtxdg/xdgdirs.cpp	2021-05-12 16:50:56.461844000 +0000
@@ -46,6 +46,8 @@
     QLatin1String("Videos")
 };
 
+static const char* TERMUX_PREFIX = "@TERMUX_PREFIX@";
+
 // Helper functions prototypes
 void fixBashShortcuts(QString &s);
 void removeEndingSlash(QString &s);
@@ -108,7 +110,7 @@
     const QString home = QFile::decodeName(qgetenv("HOME"));
 
     if (home.isEmpty())
-        return QString::fromLatin1("/tmp");
+        return QString::fromLatin1(TERMUX_PREFIX) + QString::fromLatin1("/tmp");
     else if (dir == XdgDirs::Desktop)
         fallback = QString::fromLatin1("%1/%2").arg(home, QLatin1String("Desktop"));
     else
@@ -270,8 +272,8 @@
 #endif
 
     if (dirs.isEmpty()) {
-        dirs.append(QString::fromLatin1("/usr/local/share"));
-        dirs.append(QString::fromLatin1("/usr/share"));
+        dirs.append(QString::fromLatin1(TERMUX_PREFIX) + QString::fromLatin1("/local/share"));
+        dirs.append(QString::fromLatin1(TERMUX_PREFIX) + QString::fromLatin1("/share"));
     } else {
         QMutableListIterator<QString> it(dirs);
         while (it.hasNext()) {
@@ -293,7 +295,7 @@
     QStringList dirs;
     const QString env = QFile::decodeName(qgetenv("XDG_CONFIG_DIRS"));
     if (env.isEmpty())
-        dirs.append(QString::fromLatin1("/etc/xdg"));
+        dirs.append(QString::fromLatin1(TERMUX_PREFIX) + QString::fromLatin1("/etc/xdg"));
     else
 #if (QT_VERSION >= QT_VERSION_CHECK(5,15,0))
         dirs = env.split(QLatin1Char(':'), Qt::SkipEmptyParts);