-

[Default]

-

This option selects which functions are to be usable in the C standard library.

-

When lang=c is specified, only the functions conforming to the C89 standard are included in the C standard library, and the extended functions of the C99 standard are not included. When lang=c99 is specified, the functions conforming to the C89 standard and the functions conforming to the C99 standard are included in the C standard library.

-

There are no changes in the functions included in the C++ and EC++ standard libraries.

-

When lang=c99 is specified, all functions including those specified by the C99 standard can be used. Since the number of available functions is greater than when lang=c is specified, however, generating a library may take a long time.