Tring yet another way to collect cadadi libs

Author: jmwright

pyinstaller.spec

@@ -33,6 +33,7 @@ a = Analysis(
     runtime_hooks=[
         'pyinstaller/pyi_rth_fontconfig.py',
         'pyinstaller/pyi_rth_qt_xcb.py',
+        'pyinstaller/pyi_rth_casadi.py',
     ],
     excludes=['_tkinter', 'spyder'],
     win_no_prefer_redirects=False,

pyinstaller/pyi_rth_casadi.py

@@ -0,0 +1,10 @@
+import os
+import sys
+
+# Python 3.8+ uses a restricted DLL search path on Windows. PyInstaller adds
+# _MEIPASS to the search path but not subdirectories. casadi's companion DLLs
+# live in _MEIPASS/casadi/, so register that directory explicitly.
+if sys.platform == 'win32':
+    casadi_dir = os.path.join(sys._MEIPASS, 'casadi')
+    if os.path.isdir(casadi_dir):
+        os.add_dll_directory(casadi_dir)