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The following macros check for certain structures or structure members.
Perform all the actions of
AC_HEADER_DIRENT
(see Particular Headers). Then, ifstruct dirent
contains ad_ino
member, defineHAVE_STRUCT_DIRENT_D_INO
.
HAVE_STRUCT_DIRENT_D_INO
indicates only the presence ofd_ino
, not whether its contents are always reliable. Traditionally, a zerod_ino
indicated a deleted directory entry, though current systems hide this detail from the user and never return zerod_ino
values. Many current systems report an incorrectd_ino
for a directory entry that is a mount point.
Perform all the actions of
AC_HEADER_DIRENT
(see Particular Headers). Then, ifstruct dirent
contains ad_type
member, defineHAVE_STRUCT_DIRENT_D_TYPE
.
If
struct stat
contains anst_blksize
member, defineHAVE_STRUCT_STAT_ST_BLKSIZE
. The former name,HAVE_ST_BLKSIZE
is to be avoided, as its support will cease in the future. This macro is obsoleted, and should be replaced byAC_CHECK_MEMBERS([struct stat.st_blksize])
If
struct stat
contains anst_blocks
member, defineHAVE_STRUCT_STAT_ST_BLOCKS
. Otherwise, require anAC_LIBOBJ
replacement of `fileblocks'. The former name,HAVE_ST_BLOCKS
is to be avoided, as its support will cease in the future.
If
struct stat
contains anst_rdev
member, defineHAVE_STRUCT_STAT_ST_RDEV
. The former name for this macro,HAVE_ST_RDEV
, is to be avoided as it will cease to be supported in the future. Actually, even the new macro is obsolete and should be replaced by:AC_CHECK_MEMBERS([struct stat.st_rdev])