Implemented sys.frozen.

Author: philthompson10

doc/pdytools_module.rst

@@ -12,3 +12,6 @@ and, if necessary, to change its behaviour accordingly.
     This is the version number of :program:`pdytools` encoded as a single
     (non-zero) integer.  The encoding used is the same as that used by
     :data:`sys.hexversion`.
+
+Deployed applications also follow the convention of other deployment tools of
+defining an attribute called :data:`frozen` in the :mod:`sys` module.

pyqtdeploy/builder/lib/pyqtdeploy_start.cpp

@@ -148,6 +148,10 @@ extern "C" int pyqtdeploy_start(int argc, char **argv,
         goto py_error;
 #endif
 
+    // Set sys.frozen.
+    if (PySys_SetObject("frozen", Py_True) < 0)
+        goto py_error;
+
     // Configure sys.path.
     if (path_dirs != NULL)
     {