This constant determines whether byte ordering functions and macros are included in or excluded from compilation. These components will be compiled if the value is set to 1. If the value is set to 0, they will not be compiled.

When this constant is not defined, the default value is 1. This results in the inclusion of the functions in the output code. If endianness conversion is not required (e.g., when using a single architecture), this part of the library can be excluded from compilation by setting ST_USE_ENDIANS to 0. This reduces the size of the output code.