How do I get gcc 5.2.0 compiler in platformIO ESP8266 [SOLVED]

9

For completeness, the full solution is in platformio.ini add to the [env:…] section:

build_unflags = -std=c++11
build_flags = -std=c++14
platform_packages = 
   toolchain-xtensa @ https://github.com/WallaceWilliam/xtensa-lx106-elf/raw/master/xtensa-lx106-elf-macos-1.22.0-100-ge567ec7-5.2.0.tar.gz

and on macOS you can build with c++14

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C++14 support: xtensa-gcc