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tsandmann / freertos-teensy

FreeRTOS port with C++ std::thread support for ARM boards Teensy 3.5, 3.6, 4.0 and 4.1 (cortex-m4f and cortex-m7f)
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teensy-FreeRTOS event group handler Issue when trying to use C++ Exceptions #23

Closed yamaan93 closed 11 months ago

yamaan93 commented 11 months ago

I have been trying to add a try-catch statement to my project, so I added -fexceptions and -xc++ to my build flags to enable that functionality. However when I do that I get a compiler error from teensy-freertos:

error: invalid conversion from 'void*' to 'EventGroupHandle_t' {aka 'EventGroupDef_t*'} [-fpermissive]

Not sure what exactly this means but I haven't found anything online that would suggest that this is a larger freeRTOS issue as people have been able to enable exceptions in other vanilla freertos projects, so I thought I'd raise it here.

tsandmann commented 11 months ago

You can't build FreeRTOS with -xc++. However, I don't think you need -xc++ to enable exception handling.

yamaan93 commented 11 months ago

Without -xc++ you end up with the following: 

C:\Users\Yamaan\AppData\Local\Temp\ccEqBZHb.s:34: Error: symbol `__cxa_end_cleanup' is already defined
lto-wrapper.exe: fatal error: arm-cortexm7f-eabi-g++ returned 1 exit status

This probably isn't freeRTOS related but I thought I'd put it here in case anyone else looks in the future.