--- libeio/libeio.m4	2008/05/11 01:03:33	1.3
+++ libeio/libeio.m4	2008/05/12 00:31:43	1.5
@@ -25,15 +25,13 @@
 int main(void)
 {
    int fd = 0;
-   off64_t offset = 1;
    size_t count = 2;
    ssize_t res;
-   res = readahead (fd, offset, count);
+   res = readahead (fd, 0, count);
    return 0;
 }
 ],ac_cv_readahead=yes,ac_cv_readahead=no)])
 test $ac_cv_readahead = yes && AC_DEFINE(HAVE_READAHEAD, 1, readahead(2) is available (linux))
-test $ac_cv_readahead = yes && AC_DEFINE(_GNU_SOURCE, 1, _GNU_SOURCE required for readahead (linux))
 
 AC_CACHE_CHECK(for fdatasync, ac_cv_fdatasync, [AC_LINK_IFELSE([
 #include <unistd.h>