ESP32 temperature-measurement-app fails to build

[waynepeacock]

I can get the all-clusters ESP32 example to build and run, however the temperature-measurement-app fails to build.

I have followed Instructions here: https://github.com/project-chip/connectedhomeip/blob/master/examples/temperature-measurement-app/esp32/README.md

ESP-IDF release/v4.2
CHIP commit b40ed7a

This built fine about two weeks ago.

af-event.cpp:90: undefined reference to `emberAfPluginTemperatureMeasurementServerReadEventControl'

/home/wpeacock/.espressif/tools/xtensa-esp32-elf/esp-2020r3-8.4.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: esp-idf/main/libmain.a(af-event.cpp.obj):/home/wpeacock/chip/connectedhomeip/examples/temperature-measurement-app/esp32/build/../third_party/connectedhomeip/src/app/util/af-event.cpp:90: undefined reference to `emberAfPluginTemperatureMeasurementServerReadEventControl'
/home/wpeacock/.espressif/tools/xtensa-esp32-elf/esp-2020r3-8.4.0/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: esp-idf/main/libmain.a(af-event.cpp.obj):(.data.emAfEvents+0x4): undefined reference to `emberAfPluginTemperatureMeasurementServerReadEventHandler()'
collect2: error: ld returned 1 exit status

Regards
Wayne