C++ 11 support for RT-Thread

Features

Here are some features about rt-thread c++11 threading futures.

• Atomic.
• Conditional variables.
• Clocks.
• Future.
• Mutexes.
• Threads.
• TLS.

How To Use

Note that using C++ 11 in rt-thread requires modifying some of the files in the toolchain. Before modifying the tool, back up the tool chain.

1. Enable c++11 support

1. Download toolchain GCC 10.2.1:

   gcc version 10.2.1 20201103 (release) (GNU Arm Embedded Toolchain 10-2020-q4-major)

1. Delete the following files:

   rm -f toolchain/arm-none-eabi/include/c++/10.2.1/thread
   rm -f toolchain/arm-none-eabi/include/c++/10.2.1/mutex
   rm -f toolchain/arm-none-eabi/include/c++/10.2.1/condition_variable
   rm -f toolchain/arm-none-eabi/include/c++/10.2.1/future
   rm -f toolchain/arm-none-eabi/include/pthread.h

1. Clear the contents of the following files and keep them to prevent compilation failures:

   toolchain/arm-none-eabi/include/sys/_pthreadtypes.h

1. Update rtconfig.py file. add compilation parameters:

   CXXFLAGS = CFLAGS  + ' -std=c++11 -fabi-version=0 -MMD -MP -MF'