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Applicable Environment
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- Topic: ApModuleFunction() problem with C++
- SDP: 6.4.1
- Host: Any supported host
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Issue
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C++ compiler complains about ApModuleFunction() setup function declaration. The error looks like
button.cpp:16: error: ISO C++ forbids declaration of 'setup_module' with no type
button.cpp: In function 'int button(PtWidget_t*, ApInfo_t*, PtCallbackInfo_t*)':
button.cpp:32: error: invalid conversion from 'int (*)(PtWidget_t*, ApInfo_t*, PtCallbackInfo_t
*)' to 'int (*)()'
button.cpp:32: error: initializing argument 2 of 'void ApModuleFunction(ApEventLink_t*, int (
*)(), int)'
cc: /usr/qnx641/host/qnx6/x86/usr/lib/gcc/i386-pc-nto-qnx6.4.0/4.3.3/cc1plus error 1
However, the function has been declared correctly:
setup_module( PtWidget_t *widget, ApInfo_t *apinfo, PtCallbackInfo_t *cbinfo )
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Recommendation________________________________________________________________________
The C++ compiler has a more strict function parameter checking.
Use the C compiler instead. Rename button.cpp to button.c.
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NOTE:
This entry has been validated against the SDP version listed above. Use
caution when considering this advice for any other SDP version. For
supported releases, please reach out to QNX Technical Support if you have any questions/concerns. ________________________________________________________________________
