https://bugs.gentoo.org/559572

make sure we can handle large files properly (like log files over 2GiB)

--- a/configure.ac
+++ b/configure.ac
@@ -10,6 +10,8 @@
 AC_STRUCT_ST_BLKSIZE
 AC_STRUCT_ST_BLOCKS
 
+AC_SYS_LARGEFILE
+
 AC_CHECK_LIB([popt],[poptParseArgvString],,
   AC_MSG_ERROR([libpopt required but not found]))