How to build firmware for esp32

[Philip2809]

Hey!

I cant figure out how to build the esp32 firmware. I get this error:

FAILED: openhaystack.elf
cmd.exe /C "cd . && C:\Espressif\tools\xtensa-esp-elf\esp-13.2.0_20240530\xtensa-esp-elf\bin\xtensa-esp32-elf-g++.exe -mlongcalls -Wno-frame-address  -fno-builtin-memcpy -fno-builtin-memset -fno-builtin-bzero -fno-builtin-stpcpy -fno-builtin-strncpy -Wl,--cref -Wl,--defsym=IDF_TARGET_ESP32=0 -Wl,--Map=C:/Philip/GitHub/macless-haystack/firmware/ESP32/build/openhaystack.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\openhaystack.elf.rsp -o openhaystack.elf  && cd ."
C:/Espressif/tools/xtensa-esp-elf/esp-13.2.0_20240530/xtensa-esp-elf/bin/../lib/gcc/xtensa-esp-elf/13.2.0/../../../../xtensa-esp-elf/bin/ld.exe: esp-idf/freertos/libfreertos.a(app_startup.c.obj):(.literal.main_task+0x24): undefined reference to `app_main'
C:/Espressif/tools/xtensa-esp-elf/esp-13.2.0_20240530/xtensa-esp-elf/bin/../lib/gcc/xtensa-esp-elf/13.2.0/../../../../xtensa-esp-elf/bin/ld.exe: esp-idf/freertos/libfreertos.a(app_startup.c.obj): in function `main_task':
C:/Philip/esp-idf-v5.3.1/esp-idf-v5.3.1/components/freertos/app_startup.c:199:(.text.main_task+0x99): undefined reference to `app_main'
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
ninja failed with exit code 1, output of the command is in the C:\Philip\GitHub\macless-haystack\firmware\ESP32\build\log\idf_py_stderr_output_66672 and C:\Philip\GitHub\macless-haystack\firmware\ESP32\build\log\idf_py_stdout_output_66672

It creates the bootloader and partitions but not the main .bin, any advice?

[Philip2809]

nvm just realized i need platformio stuff, sorry