(autoconf.info)Particular Structures


Next: Generic Structures Up: Structures

5.8.1 Particular Structure Checks
---------------------------------

The following macros check for certain structures or structure members.

 -- Macro: AC_STRUCT_DIRENT_D_INO
     Perform all the actions of `AC_HEADER_DIRENT' (Note: Particular
     Headers).  Then, if `struct dirent' contains a `d_ino' member,
     define `HAVE_STRUCT_DIRENT_D_INO'.

     `HAVE_STRUCT_DIRENT_D_INO' indicates only the presence of `d_ino',
     not whether its contents are always reliable.  Traditionally, a
     zero `d_ino' indicated a deleted directory entry, though current
     systems hide this detail from the user and never return zero
     `d_ino' values.  Many current systems report an incorrect `d_ino'
     for a directory entry that is a mount point.

 -- Macro: AC_STRUCT_DIRENT_D_TYPE
     Perform all the actions of `AC_HEADER_DIRENT' (Note: Particular
     Headers).  Then, if `struct dirent' contains a `d_type' member,
     define `HAVE_STRUCT_DIRENT_D_TYPE'.

 -- Macro: AC_STRUCT_ST_BLOCKS
     If `struct stat' contains an `st_blocks' member, define
     `HAVE_STRUCT_STAT_ST_BLOCKS'.  Otherwise, require an `AC_LIBOBJ'
     replacement of `fileblocks'.  The former name, `HAVE_ST_BLOCKS' is
     to be avoided, as its support will cease in the future.

 -- Macro: AC_STRUCT_TM
     If `time.h' does not define `struct tm', define `TM_IN_SYS_TIME',
     which means that including `sys/time.h' had better define `struct
     tm'.

     This macro is obsolescent, as `time.h' defines `struct tm' in
     current systems.  New programs need not use this macro.

 -- Macro: AC_STRUCT_TIMEZONE
     Figure out how to get the current timezone.  If `struct tm' has a
     `tm_zone' member, define `HAVE_STRUCT_TM_TM_ZONE' (and the
     obsoleted `HAVE_TM_ZONE').  Otherwise, if the external array
     `tzname' is found, define `HAVE_TZNAME'; if it is declared, define
     `HAVE_DECL_TZNAME'.


automatically generated by info2www