How to add compiler flags to PlatformIO project
In order to add compiler flags to your PlatformIO project, add the following line to your build config(s) in platformio.ini
:
build_flags = -std=gnu++17
You can also use multiple lines:
build_flags =
-std=gnu++17
-ffast-math
Full platformio.ini
example:
[env:d1_mini]
platform = espressif8266
board = d1_mini
framework = arduino
monitor_speed = 115200
build_flags = -std=gnu++17