Article: Q168934
Product(s): Microsoft C Compiler
Version(s): 5.0,6.0
Operating System(s):
Keyword(s): kbtool kbCompiler kbCPPonly kbLangCPP kbVC kbVC500bug kbVC600bug kbNoUpdate
Last Modified: 10-FEB-2002
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The information in this article applies to:
- The Standard C++ Library, used with:
- Microsoft Visual C++, 32-bit Enterprise Edition, versions 5.0, 6.0
- Microsoft Visual C++, 32-bit Professional Edition, versions 5.0, 6.0
- Microsoft Visual C++, 32-bit Learning Edition, version 6.0
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SYMPTOMS
========
If you use the /Za switch (Disable Language Extensions) when compiling the
Standard C++ Library headers, it causes multiple compiler errors. For example:
cl /Za /c /GX /Tp"iosfwd"
Causes the following compiler errors:
iosfwd(132) : error C2906: C++ language change: to explicitly specialize
class template 'char_traits' use the following syntax - template<>
struct char_traits<unsigned short> ...
iosfwd(171) : error C2906: C++ language change: to explicitly specialize class
template 'char_traits' use the following syntax - template<> struct
char_traits<char> ...
Examples of other header files known to cause multiple compiler errors like
C2838, C2146, and C2501 are: <utility>, <iterator>, <xstring>,
<functional>, and <limits>.
RESOLUTION
==========
Do not use the compiler option /Za (Disable Language Extensions) when compiling
the Standard C++ Library headers.
STATUS
======
Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.
This problem was corrected in Microsoft Visual C++ .NET.
Additional query words:
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Keywords : kbtool kbCompiler kbCPPonly kbLangCPP kbVC kbVC500bug kbVC600bug kbNoUpdate
Technology : kbVCsearch kbAudDeveloper kbVCLibrary
Version : :5.0,6.0
Issue type : kbbug
Solution Type : kbfix
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