esp8266.txt

/* Install SDK and build from Sources 2015/06/22.
https://github.com/pfalcon/esp-open-sdk
SDK: http://bbs.espressif.com/viewtopic.php?f=5&t=591&sid=5b3f246ae1062adff72b48bfbad9ce4c
Patch for SDK: http://bbs.espressif.com/viewtopic.php?f=5&t=608&sid=5b3f246ae1062adff72b48bfbad9ce4c
Please replace them in esp_iot_sdk/lib folder.

sudo apt-get install make unrar autoconf automake libtool gcc g++ gperf flex bison texinfo gawk ncurses-dev libexpat-dev python sed

https://github.com/jeelabs/esp-link
cd esp-link
git submodule init
git submodule update

Make sure esp-open-sdk/xtensa-lx106-elf/bin is in the PATH
http://unix.stackexchange.com/questions/26047/how-to-correctly-add-a-path-to-path
PATH=$PATH:~esp-open-sdk/xtensa-lx106-elf/bin

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/go/bin:/home/john/go/bin:/home/john/github/esp8266/esp-open-sdk/xtensa-lx106-elf/bin

export PATH=/home/john/github/esp8266/esp-open-sdk/xtensa-lx106-elf/bin:$PATH

edit @tve Makefile:
SDK_BASE ?= $(abspath ../esp_iot_sdk_v1.1.2p)
on my system I needed:
SDK_BASE ?= $(abspath ../esp_iot_sdk_v1.1.2)

Flashing the device after make:
./wiflash 192.168.1.24 firmware/user1.bin firmware/user2.bin