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Particular Type Checks

These macros check for particular C types in sys/types.h, stdlib.h and others, if they exist.

AC_TYPE_GETGROUPS

Macro

Define GETGROUPS_T to be whichever of gid_t or int is the base type of the array argument to getgroups.

AC_TYPE_MODE_T

Macro

Equivalent to AC_CHECK_TYPE(mode_t, int).

AC_TYPE_OFF_T

Macro

Equivalent to AC_CHECK_TYPE(off_t, long).

AC_TYPE_PID_T

Macro

Equivalent to AC_CHECK_TYPE(pid_t, int).

AC_TYPE_SIGNAL

Macro

If signal.h declares signal as returning a pointer to a function returning void, define RETSIGTYPE to be void; otherwise, define it to be int. Define signal handlers as returning type RETSIGTYPE: RETSIGTYPE hup_handler () { ... }

AC_TYPE_SIZE_T

Macro

Equivalent to AC_CHECK_TYPE(size_t, unsigned).

AC_TYPE_UID_T

Macro

If uid_t is not defined, define uid_t to be int and gid_t to be int.