error during building

[garfieldhan]

D:\es32\Ai-Thinker-Open_ESP32-CAMERA_LAN\examples\single_chip\camera_web_server>idf.py build
Checking Python dependencies...
Python requirements from D:\es32\Ai-Thinker-Open_ESP32-CAMERA_LAN\esp-idf\requirements.txt are satisfied.
Executing action: all (aliases: build)
Running ninja in directory d:\es32\ai-thinker-open_esp32-camera_lan\examples\single_chip\camera_web_server\build
Executing "ninja all"...
[0/1] Re-running CMake...
-- mconf-idf version mconf-v4.6.0.0-idf-20190628-win32
-- ccache will be used for faster recompilation
-- Project version: 97a29e1-dirty
-- Building ESP-IDF components for target esp32
Loading defaults file D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/examples/single_chip/camera_web_server/sdkconfig.defaults...
-- Could NOT find Perl (missing: PERL_EXECUTABLE)
-- Adding linker script D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/examples/single_chip/camera_web_server/build/esp-idf/esp32/esp32_out.ld
-- Adding linker script D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp32/ld/esp32.project.ld.in
-- Adding linker script D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp32/ld/esp32.peripherals.ld
-- Adding linker script D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_rom/esp32/ld/esp32.rom.ld
-- Adding linker script D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_rom/esp32/ld/esp32.rom.libgcc.ld
-- Adding linker script D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_rom/esp32/ld/esp32.rom.syscalls.ld
-- Adding linker script D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_rom/esp32/ld/esp32.rom.newlib-data.ld
CMake Warning (dev) at main/CMakeLists.txt:1:
Syntax Warning in cmake code at column 111

Argument not separated from preceding token by whitespace.
This warning is for project developers. Use -Wno-dev to suppress it.

-- Components: app_trace app_update asio bootloader bootloader_support bt coap console cxx driver efuse esp-face esp-sr esp-tls esp32 esp32-camera esp_adc_cal esp_common esp_eth esp_event esp_gdbstub esp_http_client esp_http_server esp_https_ota esp_https_server esp_local_ctrl esp_ringbuf esp_rom esp_websocket_client esp_wifi espcoredump esptool_py expat fatfs fb_gfx freemodbus freertos heap idf_test jsmn json libsodium log lwip main mbedtls mdns mqtt newlib nghttp nvs_flash openssl partition_table protobuf-c protocomm pthread sdmmc soc spi_flash spiffs tcp_transport tcpip_adapter ulp unity vfs wear_levelling wifi_provisioning wpa_supplicant xtensa
-- Component paths: D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/app_trace D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/app_update D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/asio D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/bootloader D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/bootloader_support D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/bt D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/coap D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/console D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/cxx D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/driver D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/efuse D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp-face D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp-sr D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp-tls D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp32 D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp32-camera D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_adc_cal D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_common D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_eth D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_event D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_gdbstub D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_http_client D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_http_server D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_https_ota D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_https_server D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_local_ctrl D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_ringbuf D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_rom D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_websocket_client D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_wifi D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/espcoredump D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esptool_py D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/expat D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/fatfs D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/fb_gfx D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/freemodbus D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/freertos D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/heap D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/idf_test D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/jsmn D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/json D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/libsodium D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/log D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/lwip D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/examples/single_chip/camera_web_server/main D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/mbedtls D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/mdns D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/mqtt D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/newlib D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/nghttp D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/nvs_flash D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/openssl D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/partition_table D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/protobuf-c D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/protocomm D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/pthread D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/sdmmc D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/soc D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/spi_flash D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/spiffs D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/tcp_transport D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/tcpip_adapter D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/ulp D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/unity D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/vfs D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/wear_levelling D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/wifi_provisioning D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/wpa_supplicant D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/xtensa
-- Configuring done
-- Generating done
-- Build files have been written to: D:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/examples/single_chip/camera_web_server/build
[7/21] Building C object esp-idf/main/CMakeFiles/__idf_main.dir/app_sd.c.obj
../main/app_sd.c:102:13: warning: 'Sdcard_task' defined but not used [-Wunused-function]
static void Sdcard_task(void *pvParameters)
^~~~~~~~~~~
[9/21] cmd.exe /C "cd /D D:\es32\Ai-Thinker-Open_ESP32-CAMERA_LAN\examples\single_chip\camera_web_server\build\esp-id...s\cmake\3.13.4\bin\cmake.exe -E echo *******************************************************************************"
Partition table binary generated. Contents:

---

Espressif ESP32 Partition Table

Name, Type, SubType, Offset, Size, Flags

factory,app,factory,0x10000,3840K,
nvs,data,nvs,0x3d0000,16K,
face_id,32,32,0x3e0000,128K,

---

[12/21] Performing build step for 'bootloader'
ninja: no work to do.
[13/19] Building C object esp-idf/main/CMakeFiles/__idf_main.dir/app_mdns.c.obj
FAILED: esp-idf/main/CMakeFiles/__idf_main.dir/app_mdns.c.obj
ccache C:\Espressif\tools\xtensa-esp32-elf\esp-2019r2-8.2.0\xtensa-esp32-elf\bin\xtensa-esp32-elf-gcc.exe -DHAVE_CONFIG_H -DMBEDTLS_CONFIG_FILE="mbedtls/esp_config.h" -Iconfig -I../main/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/newlib/platform_include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/freertos/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/heap/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/log/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/soc/esp32/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/soc/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_rom/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_common/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/xtensa/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/xtensa/esp32/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp32/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/driver/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_ringbuf/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_event/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/tcpip_adapter/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/lwip/include/apps -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/lwip/include/apps/sntp -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/lwip/lwip/src/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/lwip/port/esp32/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/lwip/port/esp32/include/arch -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/vfs/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_wifi/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_wifi/esp32/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_eth/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/efuse/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/efuse/esp32/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/app_trace/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp32-camera/driver/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp32-camera/conversions/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp-face/face_detection/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp-face/face_recognition/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp-face/object_detection/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp-face/image_util/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/esp-face/lib/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/spi_flash/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/nvs_flash/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/mbedtls/port/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/mbedtls/mbedtls/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/esp_http_server/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/nghttp/port/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/nghttp/nghttp2/lib/includes -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/components/fb_gfx/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/mdns/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/console -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/fatfs/diskio -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/fatfs/vfs -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/fatfs/src -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/wear_levelling/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/sdmmc/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/wpa_supplicant/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/wpa_supplicant/port/include -ID:/es32/Ai-Thinker-Open_ESP32-CAMERA_LAN/esp-idf/components/wpa_supplicant/include/esp_supplicant -mlongcalls -Wno-frame-address -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -nostdlib -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-but-set-variable -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wextra -Wno-unused-parameter -Wno-sign-compare -ggdb -mfix-esp32-psram-cache-issue -Og -std=gnu99 -Wno-old-style-declaration -D_GNU_SOURCE -DIDF_VER="v4.0-276-g57a5a486ff" -DGCC_NOT_5_2_0 -DESP_PLATFORM -MD -MT esp-idf/main/CMakeFiles/__idf_main.dir/app_mdns.c.obj -MF esp-idf\main\CMakeFiles__idf_main.dir\app_mdns.c.obj.d -o esp-idf/main/CMakeFiles/__idf_main.dir/app_mdns.c.obj -c ../main/app_mdns.c
../main/app_mdns.c: In function 'app_mdns_main':
../main/app_mdns.c:247:69: error: 'mac[0]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
ESP_LOGI("base MAC address", "%02X:%02X:%02X:%02X:%02X:%02X",mac[0], mac[1], mac[2],mac[3], mac[4], mac[5]);
^
../main/app_mdns.c:247:77: error: 'mac[1]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
ESP_LOGI("base MAC address", "%02X:%02X:%02X:%02X:%02X:%02X",mac[0], mac[1], mac[2],mac[3], mac[4], mac[5]);
^
../main/app_mdns.c:247:85: error: 'mac[2]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
ESP_LOGI("base MAC address", "%02X:%02X:%02X:%02X:%02X:%02X",mac[0], mac[1], mac[2],mac[3], mac[4], mac[5]);
^
../main/app_mdns.c:247:92: error: 'mac[3]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
ESP_LOGI("base MAC address", "%02X:%02X:%02X:%02X:%02X:%02X",mac[0], mac[1], mac[2],mac[3], mac[4], mac[5]);
^
../main/app_mdns.c:247:100: error: 'mac[4]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
ESP_LOGI("base MAC address", "%02X:%02X:%02X:%02X:%02X:%02X",mac[0], mac[1], mac[2],mac[3], mac[4], mac[5]);
^
../main/app_mdns.c:247:108: error: 'mac[5]' may be used uninitialized in this function [-Werror=maybe-uninitialized]
ESP_LOGI("base MAC address", "%02X:%02X:%02X:%02X:%02X:%02X",mac[0], mac[1], mac[2],mac[3], mac[4], mac[5]);
^
cc1.exe: some warnings being treated as errors
[14/19] Building C object esp-idf/main/CMakeFiles/__idf_main.dir/app_smart_wifi.c.obj
../main/app_smart_wifi.c:87:13: warning: 'initialize_sntp' defined but not used [-Wunused-function]
static void initialize_sntp(void)
^~~~~~~~~~~~~~~
ninja: build stopped: subcommand failed.
ninja failed with exit code 1