cc -pthread   -Wall -Wextra -Werror=implicit-function-declaration math/yn.c -o math/yn -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt  -lintl -liconv
[cc@relibc::platform::sys:699 INFO] TODO: getrlimit(3, 0x7ffffffffb80): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(3, 0x7ffffffffa90): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(9, 0x7ffffffffa60): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(9, 0x7ffffffffa90): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(5, 0x7ffffffffa90): not implemented
[cc1@relibc::platform::sys:699 INFO] TODO: getrlimit(9, 0x7ffffffffa60): not implemented
math/yn.c:11: warning: ignoring '#pragma STDC FENV_ACCESS' [-Wunknown-pragmas]
   11 | #pragma STDC FENV_ACCESS ON
      | 
math/yn.c: In function 'test':
math/yn.c:38:25: error: implicit declaration of function 'yn' [-Werror=implicit-function-declaration]
   38 |         double output = yn(input1, input2);
      |                         ^~
math/yn.c:38:25: warning: incompatible implicit declaration of built-in function 'yn' [-Wbuiltin-declaration-mismatch]
cc1: some warnings being treated as errors