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_main undefined

I have a sample application with a UML tool (Rhapsody) I use the default startup.a51 file, then I provide a idf3main.c file where main() is defined. When I compile / link then compilation looks fine, but the linker complains:

*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  MAIN
    MODULE:  C:\ND\KEIL\C51\LIB\C51L.LIB (?C_INIT)

When I look in the map file I can't find main, but _main instead. What do I do that my main is not converted to a _main symbol, thus enabling the linker to complete linkage.

0 Jon Ward over 22 years ago

Remove the arguments from the main function and declare main with a void argument list. No arguments are passed to main in C51.

Jon

BTW. This is completely a guess. Let us know if this was the problem.
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0 Andy Neil over 22 years ago

C51's naming conventions - including whether or not an underscore is prefixed to function names - is described in Chapter 6 of the manual.
See the section on Segment Naming Conventions

This seems to support Jon's guess...
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