esp32 build broken with IDF version 3.1.4 => missing toolchain_versions.mk in IDF repo

[albmef]

Hi
build broken, cannot retrieve toolchain because of missing file
esp-idf-v3.1.4/tools/toolchain_versions.mk

espressif does not provides 'tools/toolchain_versions.mk' for the IDF 3.1 branch tags 3.1.4 to 3.1.7

tested with 3.1.3 => build OK !!!
make ESP_IDF_VERSION=v3.1.3
make ESP_IDF_VERSION=v3.1.3 COMPORT=/dev/ttyUSB0 flash

tested with 3.3 => build OK !!!
make ESP_IDF_VERSION=v3.3
make ESP_IDF_VERSION=v3.3 COMPORT=/dev/ttyUSB0 flash

best regards
Alban

[Jos-Ven]

My version v3.1.4 runs without problems. (clean install)
According https://github.com/espressif/esp-idf/releases
version ESP-IDF v4.3 has been released.
Lots of changes. Not yet tried.