Microsoft KB Archive/51487
Unresolved ENTGQQ Is Mixed-Language Calling Convention Problem ID Number: Q51487
4.00 | 4.00 MS-DOS | OS/2
If the linker returns an “Unresolved External” error for the label “ENTGQQ” when doing C and Pascal mixed-language programming, then the cause is most likely the use of the wrong calling convention on the C main() function.
ENTGQQ is the program entry point for an executable Pascal program. If your main program is in C and you are generating Pascal calling conventions with the /Gc compiler option, then you must explicitly declare your main() function with the “cdecl” keyword. Failure to do this results in an attempt to resolve the C main() start-up calls in the Pascal rather than the C libraries, resulting in the unresolved entry point ENTGQQ.