clang -O2   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/FP_FAST_FMAL.c -o math/FP_FAST_FMAL -D_POSIX_C_SOURCE=202405L  -lm   -lintl
math/FP_FAST_FMAL.c:4:2: error: "FP_FAST_FMAL is not defined"
#error "FP_FAST_FMAL is not defined"
 ^
1 error generated.