Specific build_flags in [env:*] cause PlatformIO runtime error.

[myrrlyn]

I've found a fault in how PlatformIO processes CCFLAGS-modifying options in the build_flags environment section of platformio.ini.

I've attached a brief overview of my system, my platformio.ini file, and the log of platformio run's output.

https://gist.github.com/myrrlyn/c1f3a2fd5e6a8d0ef613

[ivankravets]

• If you use PlatformIO IDE, please click on Gear(Settings) icons, Community Packages > platformio-ide > Settings > Use development version of PlatformIO.

Please re-test it.

[ivankravets]

Also, build_flags = -include Arduino.h will raise error. That is OK, because you are going "to insert" into EACH build file "Arduino.h" which raises conflicts.