Building the toolchain seems to be fine, but compiling the IoT SDK gives this error:
[..]~/esp-open-sdk/esp_iot_sdk_v0.9.4$ make
../Makefile:136: warning: overriding recipe for target 'clean'
Makefile:95: warning: ignoring old recipe for target 'clean'
You cloned without --recursive, fetching submodules for you.
git submodule update --init --recursive
make -C crosstool-NG -f ../Makefile _ct-ng
make[1]: *** crosstool-NG: No such file or directory. Stop.
../Makefile:122: recipe for target 'crosstool-NG/ct-ng' failed
make: *** [crosstool-NG/ct-ng] Error 2
Seems to be a directory problem?
crosstool-NG is at the same dir level as sdk.