cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations float/LDBL_HAS_SUBNORM.c -o float/LDBL_HAS_SUBNORM -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
float/LDBL_HAS_SUBNORM.c:3:2: error: "LDBL_HAS_SUBNORM is not defined"
#error "LDBL_HAS_SUBNORM is not defined"
 ^
1 error generated.