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-rw-r--r--configure.ac4
1 files changed, 4 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index b033bca3..cba067fc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -182,6 +182,10 @@ AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_STRUCT_TM
+dnl If the `fseeko' function is available, define `HAVE_FSEEKO'. Define
+dnl `_LARGEFILE_SOURCE' if necessary.
+AC_FUNC_FSEEKO
+
dnl Check if optarg (and presumably related externs) already declared in headers
AC_CHECK_DECLS([optarg])