DOC: MIDL /char Switch Does Not Behave as Expected |
Q193471
The information in this article applies to:
- Microsoft Win32 Software Development Kit (SDK)
- 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
SUMMARY
The MIDL /char command line switch is used to ensure that the MIDL compiler and the Visual C++ compiler operate together correctly for all char types. By default, a MIDL char is unsigned whereas a default char in Visual C++ is signed. The MIDL /char switch is used to force MIDL to generate signed or unsigned chars and can be used to match the type generated by the Visual C++ compiler.
The online documentation at keyword index /char states the following:
The /char signed option indicates that the C-compiler char type is signed.
Using /char signed results in MIDL chars that are unsigned. Therefore, the types will be mismatched and the project will not compile. Use /char unsigned to generate MIDL signed chars.
The same documentation also states the following:
The /char unsigned option indicates that the C-compiler char type is unsigned.
Using /char unsigned results in MIDL chars that are signed. Therefore, the types will be mismatched and the project will not compile. Use /char signed to generate MIDL unsigned chars. For additional information, please see the following article in the Microsoft Knowledge Base:
Q201094 PRB: Error C2259 on "char" Type Redefinition in Visual C++ ATL Project
REFERENCES
For Visual C++ 5.0 and 6.0 see the following online documentation:
MSDN Library : SDK Documentation; Platform SDK; COM and ActiveX Object Services; MIDL; MIDL Command-Line Reference
Additional query words:
Keywords : kbdocfix kbdocerr kbSDKPlatform kbVC500bug kbVC600bug
Issue type :
Technology : kbVCsearch kbWin32SDKSearch kbAudDeveloper kbSDKSearch kbWin32sSearch kbVC500 kbVC600 kbVC32bitSearch kbVC500Search
Last Reviewed: May 6, 2001 |
