diff --git a/rtl/inc/platform.inc b/rtl/inc/platform.inc
new file mode 100644
index 0000000000..b4e8b193b8
--- /dev/null
+++ b/rtl/inc/platform.inc
@@ -0,0 +1,122 @@
+{*****************************************************************************
+   Include file to sort out compilers/platforms/targets
+
+   Copyright (c) 1997 Balazs Scheidler (bazsi@tas.vein.hu)
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+ *****************************************************************************
+
+   This include file defines some conditional defines to allow us to select
+   the compiler/platform/target in a consequent way.
+
+    OS_XXXX         The operating system used (XXXX may be one of:
+                       DOS, OS2, Linux, Windows)
+
+ *****************************************************************************
+
+   Changelog:
+
+     Date       Version        Who        Comments
+     02 Jul 97  0.1            Bazsi      Initial implementation
+     28 Aug 97  0.2            LdeB       Fixed OS2 platform sort out
+     29 Aug 97  0.3            LdeB       Added assembler type change
+     29 Aug 97  0.4            LdeB       OS_DOS removed from Windows
+      5 May 98  0.5            CEC        FPC only support - fixed for Win32
+ *****************************************************************************
+
+    This is how the IFDEF and UNDEF statements below should translate.
+
+
+ PLATFORM  SYSTEM    COMPILER  HANDLE SIZE      ASM          CPU
+ --------  ------    --------  -----------      ----         ---
+
+ DOS      OS_DOS       FPC     16-bit           AT&T         CPU86
+
+ WIN32    OS_WINDOWS   FPC     32-bit           AT&T         ----
+
+ LINUX    OS_LINUX     FPC     32-bit           AT&T         ----
+
+ OS2      OS_OS2       FPC     ?????            AT&T         CPU86
+
+ ATARI    OS_ATARI     FPC     16-bit           Internal     CPU68
+
+ MACOS    OS_MAC       FPC     ?????            Internal     CPU68
+
+ AMIGA    OS_AMIGA     FPC     32-bit           Internal     CPU68
+
+ *****************************************************************************}
+
+{$IFDEF FPC}
+
+{$IFDEF GO32V1}
+{$I386_ATT}
+{$IFNDEF CPU86}
+  {$DEFINE CPU86}
+{$ENDIF}
+{$DEFINE OS_DOS}
+{$ENDIF}
+
+{$IFDEF GO32V2}
+{$I386_ATT}
+{$IFNDEF CPU86}
+  {$DEFINE CPU86}
+{$ENDIF}
+{$DEFINE OS_DOS}
+{$ENDIF}
+
+{$IFDEF LINUX}
+{$DEFINE OS_LINUX}
+{$ENDIF}
+
+{$IFDEF WIN32}
+{$DEFINE OS_WINDOWS}
+{$ENDIF}
+
+{$IFDEF OS2}
+{$I386_ATT}
+{$IFNDEF CPU86}
+  {$DEFINE CPU86}
+{$ENDIF}
+{$DEFINE OS_OS2}
+{$ENDIF}
+
+{$IFDEF AMIGA}
+{$DEFINE OS_AMIGA}
+{$IFNDEF CPU68}
+  {$DEFINE CPU68}
+{$ENDIF}
+{$ENDIF}
+
+{$IFDEF ATARI}
+{$DEFINE OS_ATARI}
+{$IFNDEF CPU68}
+  {$DEFINE CPU68}
+{$ENDIF}
+{$ENDIF}
+
+{$IFDEF MACOS}
+{$DEFINE OS_MAC}
+{$IFNDEF CPU68}
+  {$DEFINE CPU68}
+{$ENDIF}
+{$ENDIF}
+
+{$ELSE}
+Requires Free Pascal (FPK) v0.9.2 or higher
+{$ENDIF}
+