cc -pthread -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/fma.c -o math/fma -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv math/fma.c:5:41: error: ‘fma’ undeclared here (not in a function); did you mean ‘fmax’? 5 | double (*foo)(double, double, double) = fma; | ^~~ | fmax