I'm reviewing this patch http://archives.postgresql.org/pgsql-patches/2007-04/msg00531.php which contains this configure.in code to decide if it's safe to allow use of non-segmented files:
if test $ac_cv_func_fseeko = yes; then AC_SYS_LARGEFILE fi + if test "$ac_cv_sys_large_files" = "no" -o "$segmented_files" = "yes"; then + AC_DEFINE([USE_SEGMENTED_FILES], 1, + [Define to split data file in 1GB segments.]) + fi AFAICT this is simply wrong. ac_cv_sys_large_files isn't set to reflect whether the platform has largefile support or not; it's set to reflect whether you need to #define _LARGE_FILES to get that. On a platform where largefile support is native, or is instead enabled by setting _FILE_OFFSET_BITS to 64, this test would refuse to allow USE_SEGMENTED_FILES to be disabled. Another problem is that it'll do the wrong thing if fseeko isn't present, because then AC_SYS_LARGEFILE isn't executed at all. A quick look at the configure script suggests that the available macros don't really set anything that specifically tells you if they found working largefile support. I'm considering doing AC_CHECK_SIZEOF(off_t) and then looking at the result, but I wonder if anyone knows the "approved" way to accomplish this. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers