The following variables muse be set at the workspace level before building: To set them, go to Windows -> Preferences -> C/C++ -> Build -> Build Variables and click "Add..."
XtensaGccPath: The path to your xtensa toolchain bin directory. For example... /xtensa-lx106-elf-gcc/1.20.0-26-gb404fb9-2/bin EspBootFile: The esp8266 boot file. For example... /esp8266/hardware/esp8266/2.4.1/bootloaders/eboot/eboot.elf EspToolPath: The path to esptool. For example... /esp8266/tools/esptool/0.4.13/esptool.exe