DOCUMENT:Q152131  04-AUG-2001  [visualc]
TITLE   :FIX: C1001: Extern in Function Call or Bad Type in Prototype
PRODUCT :Microsoft C Compiler
PROD/VER:4.0 4.1 4.2
OPER/SYS:
KEYWORDS:kbCompiler kbCPPonly kbVC kbVC500fix

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The information in this article applies to:

 - The C/C++ Compiler (CL.EXE), included with:
    - Microsoft Visual C++, 32-bit Editions, version 4.04.1 
    - Microsoft Visual C++, 32-bit Enterprise Edition, version 4.2 
    - Microsoft Visual C++, 32-bit Professional Edition, version 4.2 
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SYMPTOMS
========

When using extern in a function call, the compiler generates an Internal
Compiler Error (ICE). A syntax error should be generated instead.

When specifying an illegal type in a function prototype within a function, the
compiler generates an ICE. A syntax error should be generated instead.

Both of the above situations result in the following error message when using
Visual C++ 4.0:

   fatal error C1001: INTERNAL COMPILER ERROR

   (compiler file 'msc1.cpp', line 899)

When using Visual C++ 4.1, the error message in both situations is the
following:

   fatal error C1001: INTERNAL COMPILER ERROR

   (compiler file 'msc1.cpp', line 1090)

When using Visual C++ 4.2, the error message in both situations is the
following:

   fatal error C1001: INTERNAL COMPILER ERROR

   (compiler file 'msc1.cpp', line 1089)

RESOLUTION
==========

Do not use extern in a function call.

Specify a legal type in the argument list of the function prototype.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This bug was corrected in Visual C++ version 5.0.

MORE INFORMATION
================

Sample Code
-----------

      /* Compile options needed: none
      */ 
      //Code sample 1
      int func(int);
      void main () {
         extern func(1);   //C1001 (ICE) on this line; "extern" is illegal
      }
      //Code sample 2
      int func(int);
      void main () {
         extern int func(1);  //C1001 (ICE); "1" is an illegal type
      }

Additional query words: kbVC400bug

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Keywords          : kbCompiler kbCPPonly kbVC kbVC500fix 
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : 4.0 4.1 4.2
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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