x86_64-managarm-gcc -pthread -Wall -Wextra -Werror=implicit-function-declaration time/strftime_l.c -o time/strftime_l -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv time/strftime_l.c: In function ‘main’: time/strftime_l.c:24:25: error: implicit declaration of function ‘strftime_l’; did you mean ‘strftime’? [-Wimplicit-function-declaration] 24 | size_t length = strftime_l(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", &tm, loc); | ^~~~~~~~~~ | strftime