Microsoft KB Archive/113110

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BUG: C1001: pgoMD.c, Line 4578 or 4877 Compiling for 80386

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Q113110

1.00 1.50 WINDOWS kbtool kbbuglist -- The information in this article applies to: - The Microsoft C/C++ Compiler (CL.EXE), included with: - Microsoft Visual C++ for Windows, versions 1.0 and 1.5 -- SYMPTOMS ======== The compiler generates one of the following internal compiler error messages when the sample program below is compiled with /G3 to target the 80386 processor. The C/C++ version 8.0 compiler produces: fatal error C1001: internal compiler error (compiler file '@(#)pgoMD.c:1.21', line 4578) The C/C++ version 8.0c compiler produces: fatal error C1001: internal compiler error (compiler file '@(#)pgoMD.c:1.21', line 4877) The internal compiler error is triggered by using the /G3 option with post- code-generation optimization (/Oo). Note that the post-code-generation optimization is on by default. RESOLUTION ========== To avoid the problem, one option is to use the /G2 compiler switch instead of the /G3 compiler switch. Another option is to disable the post-code- generation optimization. This can be done by either using the /Oo- option on the command line or by using #pragma optimize to disable the optimization in the source file. The comments in the sample below demonstrate using the #pragma to work around the problem. STATUS ====== Microsoft has confirmed this to be a problem in C/C++ for MS-DOS versions 8.0 and 8.0c. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available. Sample Code =========== /* Compile options needed: /c /f- /G3 */ /* Workaround compiler options: /c /Oo /f- /G3 */ int func1 (char *); int func2 (long, int); int func (int, long); // Uncomment for workaround: // #pragma optimize ("o", off) int func (int nParam, long dParam) { char szLocal[4]; long dLocal; switch (nParam) { case 1: f1 (szLocal); break; case 2: dLocal = dParam; f2 (dLocal, nParam* 2); break; default: break; } return 0; } // Uncomment for workaround: // #pragma optimize ("", on) Additional reference words: 1.00 1.50 8.00 8.00c KBCategory: kbtool kbbuglist KBSubcategory: CLIss

Keywords : kb16bitonly

Issue type : kbbug

Technology : kbVCsearch kbAudDeveloper kbCVCComp