x86_64-managarm-gcc -pthread   -Wall -Wextra -Werror=implicit-function-declaration math/y1.c -o math/y1 -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt  -lintl -liconv -lintl -liconv
math/y1.c:11: warning: ignoring ‘#pragma STDC FENV_ACCESS’ [-Wunknown-pragmas]
   11 | #pragma STDC FENV_ACCESS ON
math/y1.c: In function ‘test’:
math/y1.c:38:25: error: implicit declaration of function ‘y1’ [-Wimplicit-function-declaration]
   38 |         double output = y1(input1);
      |                         ^~
math/y1.c:38:25: warning: incompatible implicit declaration of built-in function ‘y1’ [-Wbuiltin-declaration-mismatch]