Disabling "Support ESP32 internal EMAC controller" breaks build (IDFGH-1504)

[nifomorph]

Environment

• Development Kit: none
• Module or chip used: ESP32
• IDF version: v4.0-dev-1195-g38b7744
• Build System: Make
• Compiler version: xtensa-esp32-elf-gcc (crosstool-NG esp32-2019r1) 8.2.0
• Operating System: macOS
• Power Supply: USB

Problem Description

Disabling "Support ESP32 internal EMAC controller" breaks build.

Expected Behavior

ESP-IDF should compile with valid options set in menuconfig.

Actual Behavior

Build stops on undefined symbols in components/soc/esp32/emac_hal.c

Steps to reproduce

1. make menuconfig
2. De-select Component config-->Ethernet-->Support ESP32 internal EMAC controller
3. make all

Code to reproduce this issue

Any esp-idf based project

Debug Logs

N/A

Other items if possible

Excerpt from build log:

CC build/bootloader/soc/esp32/emac_hal.o
/Users/nif/Documents/esp/esp-idf/components/soc/esp32/emac_hal.c: In function 'emac_hal_reset_desc_chain':
/Users/nif/Documents/esp/esp-idf/components/soc/esp32/emac_hal.c:141:54: error: 'CONFIG_ETH_DMA_RX_BUFFER_NUM' undeclared (first use in this function); did you mean 'CONFIG_ESP32_WIFI_TX_BUFFER_TYPE'?
                    sizeof(eth_dma_rx_descriptor_t) * CONFIG_ETH_DMA_RX_BUFFER_NUM);
                                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                      CONFIG_ESP32_WIFI_TX_BUFFER_TYPE

sdkconfig

[suda-morris]

Thank you @nifomorph we will fix it ASAP.