cc -O2 -pipe -pthread -I/usr/local/include  -Wall -Wextra -Werror=implicit-function-declaration complex/ccoshl.c -o complex/ccoshl -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread -lrt -L/usr/local/lib  -lintl -lstdthreads -lcrypt
complex/ccoshl.c:24:31: error: call to undeclared library function 'ccoshl' with type '_Complex long double (_Complex long double)'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
   24 |         long double complex output = ccoshl(input1);
      |                                      ^
complex/ccoshl.c:24:31: note: include the header <complex.h> or explicitly provide a declaration for 'ccoshl'
1 error generated.