Esp-idf: implicit declaration of function 'unlink'

[tdesmet]

Hello im trying to use vfs with spiffs. I can open and write files but when I add unlink to my code I get the following error:

error: implicit declaration of function 'unlink' [-Werror=implicit-function-declaration]
unlink("/data/foo.txt");
^

other functions like fopen, fclose, stat and rename work.

[negativekelvin]

Maybe #include <sys/unistd.h>

[tdesmet]

Thanks, that did it.