Using C++ Boost library on ESP32 - RTTI Error

[ogensyts]

Hi,

i am trying to use Boost library on my ESP32 and get this error on Boost files when issuing 'make' :

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 .... error: cannot use typeid with -fno-rtti

With this command on the terminal :

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user@ubuntu:~$  xtensa-esp32-elf-gcc-5.2.0 -v

I can see configured with

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.... --enable-cxx-flags='-fno-rtti ....

Can i remove this flag when issuing 'make' on my code to remove this error with Boost? If so how can i do it?
Or is it bad to do so ?

I am using Boost 1.53

Regards,
ogensyts

[PaulVdBergh]

Hi,

I have no experience with the boost libraries, but had the same isue with a dynamic_cast<>(). I solved it by adding the following line to the component.mk file:

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CXXFLAGS += -frtti

Hope this helps.

Paul.

[snahmad75]

Can we use boost on ESP33. Does all boost libraries work on Esp32. Does it fit under 1MB Flash?

[ogensyts]

To answer your question snahmad75, no you cannot. To give one example, Boost uses a different threading system which is not compatible with ESP32's FreeRTOS. The project will not compile.

[malachib]

It's definitely not the same as boost, but I been working on 'estd' library, providing bits and pieces of std lib functionality and works on embedded targets.

Located https://github.com/malachi-iot/estdlib