PRB: Error C2065: 'emul/emulu' : Undeclared Identifier

ID: Q153004

The information in this article applies to:

Microsoft Visual C++, 32-bit Editions, version 4.0
on the following platforms: PowerPC

SYMPTOMS

When compiling a file that includes the system header file LARGEINT.H, the following errors are reported:

C:\msdev\include\largeint.h(70) : error C2065: '__emul' :
undeclared identifier

C:\msdev\include\largeint.h(70) : error C2064: term does not
evaluate to a function

C:\msdev\include\largeint.h(87) : error C2065: '__emulu' :
undeclared identifier

C:\msdev\include\largeint.h(87) : error C2064: term does
not evaluate to a function

CAUSE

LARGEINT.H and LARGEINT.LIB are not fully supported in Visual C++ RISC edition version 4.0 for the PowerPC.

RESOLUTION

Use the compiler-supported __int64 data type (64-bit integer) in place of the LARGE_INTEGER and ULARGE_INTEGER structures in LARGEINT.H that are used to emulate a 64-bit integer.

STATUS

This behavior is by design.

MORE INFORMATION

The following is an excerpt from the header file LARGEINT.H that is included in RISC edition of Visual C++ 4.0 for the Power PC:

Note that this version (of LARGEINT.H) has not been completely tested. It is provided solely as an aid for portability. We strongly suggest the use of __int64 types in preference to LARGE_INTEGER.

All platforms supported by the 32-bit edition of Visual C++ 4.0 now support the __int64 data type. For maximum portability and ease of use, the __int64 data type should be used for all new code development. For existing code that uses LARGEINT.H, a port to the __int64 data type will be necessary if the problem mentioned above is encountered.

The header file LARGEINT.LIB and its associated library, LARGEINT.LIB, were originally created for early versions of 32-bit Microsoft C/C++ compiler. These versions of the compiler did not support a native 64-bit data type. Later versions of the compiler were extended to add this data type, replacing the need for the LARGE_INTEGER and ULARGE_INTEGER structures provided by LARGEINT.H.

Sample Code


   /* Compile options needed: CL TEST.CPP
   */ 

   #include <largeint.h>

   void main(void) {}

REFERENCES

Please see the Microsoft Visual C++ 4.0 RISC edition for the PowerPC header file LARGEINT.H.

Additional query words:

Keywords : kbVC kbPowerPC
Version : winnt:4.0
Platform : winnt
Issue type : kbprb

PRB: Error C2065: '__emul/__emulu' : Undeclared Identifier