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Particular Structure Checks

The following macros check for certain structures or structure members.

Macro: AC_STRUCT_ST_BLKSIZE

If struct stat contains an st_blksize member, define HAVE_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 by

AC_CHECK_MEMBERS([struct stat.st_blksize])

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_ST_RDEV

If struct stat contains an st_rdev member, define HAVE_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 Actually, even the new macro is obsolete, and should be replaced by: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])

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.

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.

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