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I´m having a hard time trying to compile your unmodified code in Ubuntu ESP-IDF. Do I have to set something specific to compile the code?

I´m getting the following errors:

`/home/demos/esp/printercart_simple/main/main.c: In function 'button_pressed':

/home/demos/esp/printercart_simple/main/main.c:138:11: error: implicit declaration of function 'gpio_get_level'; did you mean '_xtos_set_intlevel'? [-Werror=implicit-function-declaration]
return (!gpio_get_level(PIN_NUM_BTN));
^~~~~~~~~~~~~~
_xtos_set_intlevel
/home/demos/esp/printercart_simple/main/main.c: In function 'button_init':
/home/demos/esp/printercart_simple/main/main.c:143:2: error: unknown type name 'gpio_config_t'
gpio_config_t io_conf={
^~~~~~~~~~~~~
/home/demos/esp/printercart_simple/main/main.c:144:3: error: field name not in record or union initializer
.mode=GPIO_MODE_INPUT,
^
/home/demos/esp/printercart_simple/main/main.c:144:3: note: (near initialization for 'io_conf')
/home/demos/esp/printercart_simple/main/main.c:144:9: error: 'GPIO_MODE_INPUT' undeclared (first use in this function)
.mode=GPIO_MODE_INPUT,
^~~~~~~~~~~~~~~
/home/demos/esp/printercart_simple/main/main.c:144:9: note: each undeclared identifier is reported only once for each function it appears in
/home/demos/esp/printercart_simple/main/main.c:145:3: error: field name not in record or union initializer
.pin_bit_mask=(1ULL<<PIN_NUM_BTN),
^
/home/demos/esp/printercart_simple/main/main.c:145:3: note: (near initialization for 'io_conf')
/home/demos/esp/printercart_simple/main/main.c:145:17: warning: excess elements in scalar initializer
.pin_bit_mask=(1ULL<<PIN_NUM_BTN),
^
/home/demos/esp/printercart_simple/main/main.c:145:17: note: (near initialization for 'io_conf')
/home/demos/esp/printercart_simple/main/main.c:146:3: error: field name not in record or union initializer
.pull_up_en=1,
^
/home/demos/esp/printercart_simple/main/main.c:146:3: note: (near initialization for 'io_conf')
/home/demos/esp/printercart_simple/main/main.c:146:15: warning: excess elements in scalar initializer
.pull_up_en=1,
^
/home/demos/esp/printercart_simple/main/main.c:146:15: note: (near initialization for 'io_conf')
/home/demos/esp/printercart_simple/main/main.c:148:2: error: implicit declaration of function 'gpio_config' [-Werror=implicit-function-declaration]
gpio_config(&io_conf);
^~~~~~~~~~~
cc1: some warnings being treated as errors
make[1]: *** [/home/demos/esp/esp-idf/make/component_wrapper.mk:292: main.o] Error 1
make: *** [/home/demos/esp/esp-idf/make/project.mk:635: component-main-build] Error 2`