Since http://www.smorgasbordet.com/pellesc/ seems to be offline, you can find the Download of Pelles C here in this Forum.
MAKE Version 5.2 Copyright (c) 1987, 2000 Borlandbcc32 -c -Iinclude;C:\XHB123\include;C:\PellesC\Include -d -tWM -D__WIN32__ -D__CONSOLE__ -DUSE_PMURHASH=1 -oobj\b32\letocl.obj source\client\letocl.cBorland C++ 5.82 for Win32 Copyright (c) 1993, 2005 Borlandsource\client\letocl.c:Fatal F1003 C:\PellesC\Include\stdarg.h 9: Error directive: <stdarg.h> need POCC version 10.0 or higher*** 1 errors in Compile ***** error 1 ** deleting obj\b32\letocl.obj
I am using PellesC v11.0, I don´t undestand this.