esp-idf/components/freertos/app_startup.c:206: undefined reference to `app_main'

[ericsh2023]

espressif/python_env/idf5.1_py3.11_env/bin/python

....

Compiler supported targets: xtensa-esp32-elf

-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for stddef.h
-- Looking for stddef.h - found
-- Check size of time_t
-- Check size of time_t - done
-- Adding linker script /home/ericwang/Documents/esp-idf/components/soc/esp32/ld/esp32.peripherals.ld
-- App "bootloader" version: v5.1-dirty
-- Adding linker script /home/ericwang/Documents/esp-idf/components/esp_rom/esp32/ld/esp32.rom.ld
-- Adding linker script /home/ericwang/Documents/esp-idf/components/esp_rom/esp32/ld/esp32.rom.api.ld
-- Adding linker script /home/ericwang/Documents/esp-idf/components/esp_rom/esp32/ld/esp32.rom.libgcc.ld
-- Adding linker script /home/ericwang/Documents/esp-idf/components/esp_rom/esp32/ld/esp32.rom.newlib-funcs.ld
-- Adding linker script /home/ericwang/Documents/esp-idf/components/bootloader/subproject/main/ld/esp32/bootloader.ld
-- Adding linker script /home/ericwang/Documents/esp-idf/components/bootloader/subproject/main/ld/esp32/bootloader.rom.ld
-- Components: bootloader bootloader_support efuse esp_app_format esp_common esp_hw_support esp_rom esp_system esptool_py freertos hal log main micro-ecc newlib partition_table soc spi_flash xtensa
-- Component paths: /home/ericwang/Documents/esp-idf/components/bootloader /home/ericwang/Documents/esp-idf/components/bootloader_support /home/ericwang/Documents/esp-idf/components/efuse /home/ericwang/Documents/esp-idf/components/esp_app_format /home/ericwang/Documents/esp-idf/components/esp_common /home/ericwang/Documents/esp-idf/components/esp_hw_support /home/ericwang/Documents/esp-idf/components/esp_rom /home/ericwang/Documents/esp-idf/components/esp_system /home/ericwang/Documents/esp-idf/components/esptool_py /home/ericwang/Documents/esp-idf/components/freertos /home/ericwang/Documents/esp-idf/components/hal /home/ericwang/Documents/esp-idf/components/log /home/ericwang/Documents/esp-idf/components/bootloader/subproject/main /home/ericwang/Documents/esp-idf/components/bootloader/subproject/components/micro-ecc /home/ericwang/Documents/esp-idf/components/newlib /home/ericwang/Documents/esp-idf/components/partition_table /home/ericwang/Documents/esp-idf/components/soc /home/ericwang/Documents/esp-idf/components/spi_flash /home/ericwang/Documents/esp-idf/components/xtensa
-- Configuring done
-- Generating done
-- Build files have been written to: /home/ericwang/Documents/esp-idf/examples/esp32-play-mp3-demo-main/build/bootloader
[102/103] Generating binary image from built executableesptool.py v4.7.0
Creating esp32 image...
Merged 1 ELF section
Successfully created esp32 image.
Generated /home/ericwang/Documents/esp-idf/examples/esp32-play-mp3-demo-main/build/bootloader/bootloader.bin
[103/103] cd /home/ericwang/Documents/esp-idf/examples/esp32-play-mp3-demo-main/build/bootloader/esp-idf...x1000 /home/ericwang/Documents/esp-idf/examples/esp32-play-mp3-demo-main/build/bootloader/bootloader.binBootloader binary size 0x6810 bytes. 0x7f0 bytes (7%) free.
[880/882] Linking CXX executable mp3-decoder-idf.elfFAILED: mp3-decoder-idf.elf
: && /home/ericwang/.espressif/tools/xtensa-esp32-elf/esp-12.2.0_20230208/xtensa-esp32-elf/bin/xtensa-esp32-elf-g++ -mlongcalls -Wno-frame-address -Wl,--cref -Wl,--defsym=IDF_TARGET_ESP32=0 -Wl,--Map=/home/ericwang/Documents/esp-idf/examples/esp32-play-mp3-demo-main/build/mp3-decoder-idf.map -Wl,--no-warn-rwx-segments -fno-rtti -fno-lto -Wl,--gc-sections -Wl,--warn-common -T esp32.peripherals.ld -T esp32.rom.ld -T esp32.rom.api.ld -T esp32.rom.libgcc.ld -T esp32.rom.newlib-data.ld -T esp32.rom.syscalls.ld -T esp32.rom.newlib-funcs.ld -T memory.ld -T sections.ld CMakeFiles/mp3-decoder-idf.elf.dir/project_elf_src_esp32.c.obj -o mp3-decoder-idf.elf -L/home/ericwang/Documents/esp-idf/components/soc/esp32/ld -L/home/ericwang/Documents/esp-idf/components/esp_rom/esp32/ld -L/home/ericwang/Documents/esp-idf/examples/esp32-play-mp3-demo-main/build/esp-idf/esp_system/ld -L/home/ericwang/Documents/esp-idf/components/esp_phy/lib/esp32 -L/home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32 esp-idf/xtensa/libxtensa.a esp-idf/esp_ringbuf/libesp_ringbuf.a esp-idf/efuse/libefuse.a esp-idf/driver/libdriver.a esp-idf/esp_pm/libesp_pm.a esp-idf/mbedtls/libmbedtls.a esp-idf/esp_app_format/libesp_app_format.a esp-idf/bootloader_support/libbootloader_support.a esp-idf/esp_partition/libesp_partition.a esp-idf/app_update/libapp_update.a esp-idf/esp_mm/libesp_mm.a esp-idf/spi_flash/libspi_flash.a esp-idf/pthread/libpthread.a esp-idf/esp_system/libesp_system.a esp-idf/esp_rom/libesp_rom.a esp-idf/hal/libhal.a esp-idf/log/liblog.a esp-idf/heap/libheap.a esp-idf/soc/libsoc.a esp-idf/esp_hw_support/libesp_hw_support.a esp-idf/freertos/libfreertos.a esp-idf/newlib/libnewlib.a esp-idf/cxx/libcxx.a esp-idf/esp_common/libesp_common.a esp-idf/esp_timer/libesp_timer.a esp-idf/app_trace/libapp_trace.a esp-idf/esp_event/libesp_event.a esp-idf/nvs_flash/libnvs_flash.a esp-idf/esp_phy/libesp_phy.a esp-idf/vfs/libvfs.a esp-idf/lwip/liblwip.a esp-idf/esp_netif/libesp_netif.a esp-idf/wpa_supplicant/libwpa_supplicant.a esp-idf/esp_coex/libesp_coex.a esp-idf/esp_wifi/libesp_wifi.a esp-idf/unity/libunity.a esp-idf/cmock/libcmock.a esp-idf/console/libconsole.a esp-idf/http_parser/libhttp_parser.a esp-idf/esp-tls/libesp-tls.a esp-idf/esp_adc/libesp_adc.a esp-idf/esp_eth/libesp_eth.a esp-idf/esp_gdbstub/libesp_gdbstub.a esp-idf/esp_hid/libesp_hid.a esp-idf/tcp_transport/libtcp_transport.a esp-idf/esp_http_client/libesp_http_client.a esp-idf/esp_http_server/libesp_http_server.a esp-idf/esp_https_ota/libesp_https_ota.a esp-idf/esp_lcd/libesp_lcd.a esp-idf/protobuf-c/libprotobuf-c.a esp-idf/protocomm/libprotocomm.a esp-idf/esp_local_ctrl/libesp_local_ctrl.a esp-idf/espcoredump/libespcoredump.a esp-idf/wear_levelling/libwear_levelling.a esp-idf/sdmmc/libsdmmc.a esp-idf/fatfs/libfatfs.a esp-idf/json/libjson.a esp-idf/mqtt/libmqtt.a esp-idf/perfmon/libperfmon.a esp-idf/spiffs/libspiffs.a esp-idf/wifi_provisioning/libwifi_provisioning.a esp-idf/app_trace/libapp_trace.a esp-idf/unity/libunity.a esp-idf/wear_levelling/libwear_levelling.a esp-idf/sdmmc/libsdmmc.a esp-idf/protocomm/libprotocomm.a esp-idf/console/libconsole.a esp-idf/protobuf-c/libprotobuf-c.a esp-idf/json/libjson.a esp-idf/xtensa/libxtensa.a esp-idf/esp_ringbuf/libesp_ringbuf.a esp-idf/efuse/libefuse.a esp-idf/driver/libdriver.a esp-idf/esp_pm/libesp_pm.a esp-idf/mbedtls/libmbedtls.a esp-idf/esp_app_format/libesp_app_format.a esp-idf/bootloader_support/libbootloader_support.a esp-idf/esp_partition/libesp_partition.a esp-idf/app_update/libapp_update.a esp-idf/esp_mm/libesp_mm.a esp-idf/spi_flash/libspi_flash.a esp-idf/pthread/libpthread.a esp-idf/esp_system/libesp_system.a esp-idf/esp_rom/libesp_rom.a esp-idf/hal/libhal.a esp-idf/log/liblog.a esp-idf/heap/libheap.a esp-idf/soc/libsoc.a esp-idf/esp_hw_support/libesp_hw_support.a esp-idf/freertos/libfreertos.a esp-idf/newlib/libnewlib.a esp-idf/cxx/libcxx.a esp-idf/esp_common/libesp_common.a esp-idf/esp_timer/libesp_timer.a esp-idf/esp_event/libesp_event.a esp-idf/nvs_flash/libnvs_flash.a esp-idf/esp_phy/libesp_phy.a esp-idf/vfs/libvfs.a esp-idf/lwip/liblwip.a esp-idf/esp_netif/libesp_netif.a esp-idf/wpa_supplicant/libwpa_supplicant.a esp-idf/esp_coex/libesp_coex.a esp-idf/esp_wifi/libesp_wifi.a esp-idf/http_parser/libhttp_parser.a esp-idf/esp-tls/libesp-tls.a esp-idf/esp_adc/libesp_adc.a esp-idf/esp_eth/libesp_eth.a esp-idf/esp_gdbstub/libesp_gdbstub.a esp-idf/tcp_transport/libtcp_transport.a esp-idf/esp_http_client/libesp_http_client.a esp-idf/esp_http_server/libesp_http_server.a esp-idf/esp_https_ota/libesp_https_ota.a esp-idf/mbedtls/mbedtls/library/libmbedtls.a esp-idf/mbedtls/mbedtls/library/libmbedcrypto.a esp-idf/mbedtls/mbedtls/library/libmbedx509.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libcore.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libespnow.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libmesh.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libnet80211.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libpp.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libsmartconfig.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libwapi.a esp-idf/xtensa/libxtensa.a esp-idf/esp_ringbuf/libesp_ringbuf.a esp-idf/efuse/libefuse.a esp-idf/driver/libdriver.a esp-idf/esp_pm/libesp_pm.a esp-idf/mbedtls/libmbedtls.a esp-idf/esp_app_format/libesp_app_format.a esp-idf/bootloader_support/libbootloader_support.a esp-idf/esp_partition/libesp_partition.a esp-idf/app_update/libapp_update.a esp-idf/esp_mm/libesp_mm.a esp-idf/spi_flash/libspi_flash.a esp-idf/pthread/libpthread.a esp-idf/esp_system/libesp_system.a esp-idf/esp_rom/libesp_rom.a esp-idf/hal/libhal.a esp-idf/log/liblog.a esp-idf/heap/libheap.a esp-idf/soc/libsoc.a esp-idf/esp_hw_support/libesp_hw_support.a esp-idf/freertos/libfreertos.a esp-idf/newlib/libnewlib.a esp-idf/cxx/libcxx.a esp-idf/esp_common/libesp_common.a esp-idf/esp_timer/libesp_timer.a esp-idf/esp_event/libesp_event.a esp-idf/nvs_flash/libnvs_flash.a esp-idf/esp_phy/libesp_phy.a esp-idf/vfs/libvfs.a esp-idf/lwip/liblwip.a esp-idf/esp_netif/libesp_netif.a esp-idf/wpa_supplicant/libwpa_supplicant.a esp-idf/esp_coex/libesp_coex.a esp-idf/esp_wifi/libesp_wifi.a esp-idf/http_parser/libhttp_parser.a esp-idf/esp-tls/libesp-tls.a esp-idf/esp_adc/libesp_adc.a esp-idf/esp_eth/libesp_eth.a esp-idf/esp_gdbstub/libesp_gdbstub.a esp-idf/tcp_transport/libtcp_transport.a esp-idf/esp_http_client/libesp_http_client.a esp-idf/esp_http_server/libesp_http_server.a esp-idf/esp_https_ota/libesp_https_ota.a esp-idf/mbedtls/mbedtls/library/libmbedtls.a esp-idf/mbedtls/mbedtls/library/libmbedcrypto.a esp-idf/mbedtls/mbedtls/library/libmbedx509.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libcore.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libespnow.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libmesh.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libnet80211.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libpp.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libsmartconfig.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libwapi.a esp-idf/xtensa/libxtensa.a esp-idf/esp_ringbuf/libesp_ringbuf.a esp-idf/efuse/libefuse.a esp-idf/driver/libdriver.a esp-idf/esp_pm/libesp_pm.a esp-idf/mbedtls/libmbedtls.a esp-idf/esp_app_format/libesp_app_format.a esp-idf/bootloader_support/libbootloader_support.a esp-idf/esp_partition/libesp_partition.a esp-idf/app_update/libapp_update.a esp-idf/esp_mm/libesp_mm.a esp-idf/spi_flash/libspi_flash.a esp-idf/pthread/libpthread.a esp-idf/esp_system/libesp_system.a esp-idf/esp_rom/libesp_rom.a esp-idf/hal/libhal.a esp-idf/log/liblog.a esp-idf/heap/libheap.a esp-idf/soc/libsoc.a esp-idf/esp_hw_support/libesp_hw_support.a esp-idf/freertos/libfreertos.a esp-idf/newlib/libnewlib.a esp-idf/cxx/libcxx.a esp-idf/esp_common/libesp_common.a esp-idf/esp_timer/libesp_timer.a esp-idf/esp_event/libesp_event.a esp-idf/nvs_flash/libnvs_flash.a esp-idf/esp_phy/libesp_phy.a esp-idf/vfs/libvfs.a esp-idf/lwip/liblwip.a esp-idf/esp_netif/libesp_netif.a esp-idf/wpa_supplicant/libwpa_supplicant.a esp-idf/esp_coex/libesp_coex.a esp-idf/esp_wifi/libesp_wifi.a esp-idf/http_parser/libhttp_parser.a esp-idf/esp-tls/libesp-tls.a esp-idf/esp_adc/libesp_adc.a esp-idf/esp_eth/libesp_eth.a esp-idf/esp_gdbstub/libesp_gdbstub.a esp-idf/tcp_transport/libtcp_transport.a esp-idf/esp_http_client/libesp_http_client.a esp-idf/esp_http_server/libesp_http_server.a esp-idf/esp_https_ota/libesp_https_ota.a esp-idf/mbedtls/mbedtls/library/libmbedtls.a esp-idf/mbedtls/mbedtls/library/libmbedcrypto.a esp-idf/mbedtls/mbedtls/library/libmbedx509.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libcore.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libespnow.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libmesh.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libnet80211.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libpp.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libsmartconfig.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libwapi.a esp-idf/xtensa/libxtensa.a esp-idf/esp_ringbuf/libesp_ringbuf.a esp-idf/efuse/libefuse.a esp-idf/driver/libdriver.a esp-idf/esp_pm/libesp_pm.a esp-idf/mbedtls/libmbedtls.a esp-idf/esp_app_format/libesp_app_format.a esp-idf/bootloader_support/libbootloader_support.a esp-idf/esp_partition/libesp_partition.a esp-idf/app_update/libapp_update.a esp-idf/esp_mm/libesp_mm.a esp-idf/spi_flash/libspi_flash.a esp-idf/pthread/libpthread.a esp-idf/esp_system/libesp_system.a esp-idf/esp_rom/libesp_rom.a esp-idf/hal/libhal.a esp-idf/log/liblog.a esp-idf/heap/libheap.a esp-idf/soc/libsoc.a esp-idf/esp_hw_support/libesp_hw_support.a esp-idf/freertos/libfreertos.a esp-idf/newlib/libnewlib.a esp-idf/cxx/libcxx.a esp-idf/esp_common/libesp_common.a esp-idf/esp_timer/libesp_timer.a esp-idf/esp_event/libesp_event.a esp-idf/nvs_flash/libnvs_flash.a esp-idf/esp_phy/libesp_phy.a esp-idf/vfs/libvfs.a esp-idf/lwip/liblwip.a esp-idf/esp_netif/libesp_netif.a esp-idf/wpa_supplicant/libwpa_supplicant.a esp-idf/esp_coex/libesp_coex.a esp-idf/esp_wifi/libesp_wifi.a esp-idf/http_parser/libhttp_parser.a esp-idf/esp-tls/libesp-tls.a esp-idf/esp_adc/libesp_adc.a esp-idf/esp_eth/libesp_eth.a esp-idf/esp_gdbstub/libesp_gdbstub.a esp-idf/tcp_transport/libtcp_transport.a esp-idf/esp_http_client/libesp_http_client.a esp-idf/esp_http_server/libesp_http_server.a esp-idf/esp_https_ota/libesp_https_ota.a esp-idf/mbedtls/mbedtls/library/libmbedtls.a esp-idf/mbedtls/mbedtls/library/libmbedcrypto.a esp-idf/mbedtls/mbedtls/library/libmbedx509.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libcore.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libespnow.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libmesh.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libnet80211.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libpp.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libsmartconfig.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libwapi.a esp-idf/xtensa/libxtensa.a esp-idf/esp_ringbuf/libesp_ringbuf.a esp-idf/efuse/libefuse.a esp-idf/driver/libdriver.a esp-idf/esp_pm/libesp_pm.a esp-idf/mbedtls/libmbedtls.a esp-idf/esp_app_format/libesp_app_format.a esp-idf/bootloader_support/libbootloader_support.a esp-idf/esp_partition/libesp_partition.a esp-idf/app_update/libapp_update.a esp-idf/esp_mm/libesp_mm.a esp-idf/spi_flash/libspi_flash.a esp-idf/pthread/libpthread.a esp-idf/esp_system/libesp_system.a esp-idf/esp_rom/libesp_rom.a esp-idf/hal/libhal.a esp-idf/log/liblog.a esp-idf/heap/libheap.a esp-idf/soc/libsoc.a esp-idf/esp_hw_support/libesp_hw_support.a esp-idf/freertos/libfreertos.a esp-idf/newlib/libnewlib.a esp-idf/cxx/libcxx.a esp-idf/esp_common/libesp_common.a esp-idf/esp_timer/libesp_timer.a esp-idf/esp_event/libesp_event.a esp-idf/nvs_flash/libnvs_flash.a esp-idf/esp_phy/libesp_phy.a esp-idf/vfs/libvfs.a esp-idf/lwip/liblwip.a esp-idf/esp_netif/libesp_netif.a esp-idf/wpa_supplicant/libwpa_supplicant.a esp-idf/esp_coex/libesp_coex.a esp-idf/esp_wifi/libesp_wifi.a esp-idf/http_parser/libhttp_parser.a esp-idf/esp-tls/libesp-tls.a esp-idf/esp_adc/libesp_adc.a esp-idf/esp_eth/libesp_eth.a esp-idf/esp_gdbstub/libesp_gdbstub.a esp-idf/tcp_transport/libtcp_transport.a esp-idf/esp_http_client/libesp_http_client.a esp-idf/esp_http_server/libesp_http_server.a esp-idf/esp_https_ota/libesp_https_ota.a esp-idf/mbedtls/mbedtls/library/libmbedtls.a esp-idf/mbedtls/mbedtls/library/libmbedcrypto.a esp-idf/mbedtls/mbedtls/library/libmbedx509.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libcore.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libespnow.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libmesh.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libnet80211.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libpp.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libsmartconfig.a /home/ericwang/Documents/esp-idf/components/esp_wifi/lib/esp32/libwapi.a /home/ericwang/Documents/esp-idf/components/xtensa/esp32/libxt_hal.a -u esp_app_desc -u pthread_include_pthread_impl -u pthread_include_pthread_cond_impl -u pthread_include_pthread_local_storage_impl -u pthread_include_pthread_rwlock_impl -u pthread_include_pthread_semaphore_impl -u ld_include_highint_hdl -u start_app -u start_app_other_cores -u __ubsan_include -Wl,--wrap=longjmp -u __assert_func -u esp_dport_access_reg_read -Wl,--undefined=uxTopUsedPriority -Wl,--undefined=FreeRTOS_openocd_params -u app_main -lc -lm esp-idf/newlib/libnewlib.a -u newlib_include_heap_impl -u newlib_include_syscalls_impl -u newlib_include_pthread_impl -u newlib_include_assert_impl -Wl,--wrap=_Unwind_SetEnableExceptionFdeSorting -Wl,--wrap=__register_frame_info_bases -Wl,--wrap=__register_frame_info -Wl,--wrap=__register_frame -Wl,--wrap=__register_frame_info_table_bases -Wl,--wrap=__register_frame_info_table -Wl,--wrap=__register_frame_table -Wl,--wrap=__deregister_frame_info_bases -Wl,--wrap=__deregister_frame_info -Wl,--wrap=_Unwind_Find_FDE -Wl,--wrap=_Unwind_GetGR -Wl,--wrap=_Unwind_GetCFA -Wl,--wrap=_Unwind_GetIP -Wl,--wrap=_Unwind_GetIPInfo -Wl,--wrap=_Unwind_GetRegionStart -Wl,--wrap=_Unwind_GetDataRelBase -Wl,--wrap=_Unwind_GetTextRelBase -Wl,--wrap=_Unwind_SetIP -Wl,--wrap=_Unwind_SetGR -Wl,--wrap=_Unwind_GetLanguageSpecificData -Wl,--wrap=_Unwind_FindEnclosingFunction -Wl,--wrap=_Unwind_Resume -Wl,--wrap=_Unwind_RaiseException -Wl,--wrap=_Unwind_DeleteException -Wl,--wrap=_Unwind_ForcedUnwind -Wl,--wrap=_Unwind_Resume_or_Rethrow -Wl,--wrap=_Unwind_Backtrace -Wl,--wrap=__cxa_call_unexpected -Wl,--wrap=__gxx_personality_v0 -u __cxa_guard_dummy -lstdc++ esp-idf/pthread/libpthread.a -lgcc esp-idf/cxx/libcxx.a -u __cxx_fatal_exception -u include_esp_phy_override -lphy -lrtc esp-idf/esp_phy/libesp_phy.a -lphy -lrtc esp-idf/esp_phy/libesp_phy.a -lphy -lrtc -u vfs_include_syscalls_impl && :
/home/ericwang/.espressif/tools/xtensa-esp32-elf/esp-12.2.0_20230208/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/12.2.0/../../../../xtensa-esp32-elf/bin/ld: esp-idf/freertos/libfreertos.a(app_startup.c.obj):(.literal.main_task+0x24): undefined reference to app_main' /home/ericwang/.espressif/tools/xtensa-esp32-elf/esp-12.2.0_20230208/xtensa-esp32-elf/bin/../lib/gcc/xtensa-esp32-elf/12.2.0/../../../../xtensa-esp32-elf/bin/ld: esp-idf/freertos/libfreertos.a(app_startup.c.obj): in function main_task':
/home/ericwang/Documents/esp-idf/components/freertos/app_startup.c:206: undefined reference to `app_main'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
ninja failed with exit code 1, output of the command is in the /home/ericwang/Documents/esp-idf/examples/esp32-play-mp3-demo-main/build/log/idf_py_stderr_output_9441 and /home/ericwang/Documents/esp-idf/examples/esp32-play-mp3-demo-main/build/log/idf_py_stdout_output_9441