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/sys$common/syshlp/helplib.hlb CRTL, Feature-Test Macros, Selecting a Standard *Conan The Librarian |
You can define a feature-test macro to select each standard. You
can do this either with a #define preprocessor directive in your
C source before the inclusion of any header file, or with the
/DEFINE qualifier on the CC command line.
Features not defined by one of the previously named standards are
considered Compaq C extensions and are selected by not defining
any standards-related, feature-test macros.
If you do not explicitly define feature test macros to control
header file definitions, you implicitly include all defined
symbols as well as Compaq C extensions.
Additional Information (explode) :
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