https_server编译报错的原因？

版本：IDF4.3.5
报错输出如下：
[982/983] Linking CXX executable https_server.elf
FAILED: https_server.elf
cmd.exe /C "cd . && D:Espressiftoolsriscv32-esp-elfesp-2021r2-patch3-8.4.0riscv32-esp-elfbinriscv32-esp-elf-g++.exe  -march=rv32imc  -nostartfiles -march=rv32imc --specs=nosys.specs @CMakeFileshttps_server.elf.rsp  -o https_server.elf  && cd ."
d:/espressif/tools/riscv32-esp-elf/esp-2021r2-patch3-8.4.0/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: esp-idf/main/libmain.a(app_main.c.obj): in function `esp_create_https_server':
d:espressifframeworksesp-idf-v4.3.5workspacehttps_serverbuild/../main/app_main.c:216: undefined reference to `_binary_cacert_pem_start'
d:/espressif/tools/riscv32-esp-elf/esp-2021r2-patch3-8.4.0/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: d:espressifframeworksesp-idf-v4.3.5workspacehttps_serverbuild/../main/app_main.c:216: undefined reference to `_binary_cacert_pem_start'
d:/espressif/tools/riscv32-esp-elf/esp-2021r2-patch3-8.4.0/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: d:espressifframeworksesp-idf-v4.3.5workspacehttps_serverbuild/../main/app_main.c:217: undefined reference to `_binary_cacert_pem_end'
d:/espressif/tools/riscv32-esp-elf/esp-2021r2-patch3-8.4.0/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: d:espressifframeworksesp-idf-v4.3.5workspacehttps_serverbuild/../main/app_main.c:217: undefined reference to `_binary_cacert_pem_end'
d:/espressif/tools/riscv32-esp-elf/esp-2021r2-patch3-8.4.0/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: d:espressifframeworksesp-idf-v4.3.5workspacehttps_serverbuild/../main/app_main.c:221: undefined reference to `_binary_prvtkey_pem_start'
d:/espressif/tools/riscv32-esp-elf/esp-2021r2-patch3-8.4.0/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: d:espressifframeworksesp-idf-v4.3.5workspacehttps_serverbuild/../main/app_main.c:221: undefined reference to `_binary_prvtkey_pem_start'
d:/espressif/tools/riscv32-esp-elf/esp-2021r2-patch3-8.4.0/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: d:espressifframeworksesp-idf-v4.3.5workspacehttps_serverbuild/../main/app_main.c:222: undefined reference to `_binary_prvtkey_pem_end'
d:/espressif/tools/riscv32-esp-elf/esp-2021r2-patch3-8.4.0/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: d:espressifframeworksesp-idf-v4.3.5workspacehttps_serverbuild/../main/app_main.c:222: undefined reference to `_binary_prvtkey_pem_end'
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
ninja failed with exit code 1


请问是什么原因？