--- IO-AIO/configure.ac	2023/12/14 10:08:20	1.21
+++ IO-AIO/configure.ac	2024/02/29 18:02:43	1.22
@@ -175,20 +175,6 @@
 ]])],ac_cv_memfd_create=yes,ac_cv_memfd_create=no)])
 test $ac_cv_memfd_create = yes && AC_DEFINE(HAVE_MEMFD_CREATE, 1, memfd_create(2) is available)
 
-AC_CACHE_CHECK(for copy_file_range, ac_cv_copy_file_range, [AC_LINK_IFELSE([AC_LANG_SOURCE([[
-#include <unistd.h>
-#include <sys/syscall.h>
-/*#include <linux/copy.h>*/
-int main (void)
-{
-   int res;
-   /*res = syscall (SYS_copy_file_range, 0, 0, 0, 0, 0, COPY_FR_REFLINK | COPY_FR_DEDUP | COPY_FR_COPY);*/
-   res = syscall (SYS_copy_file_range, 0, 0, 0, 0, 0, 0);
-   return 0;
-}
-]])],ac_cv_copy_file_range=yes,ac_cv_copy_file_range=no)])
-test $ac_cv_copy_file_range = yes && AC_DEFINE(HAVE_COPY_FILE_RANGE, 1, copy_file_range(2) is available)
-
 AC_CACHE_CHECK(for st_xtimensec, ac_cv_xtimensec, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #include "EXTERN.h"
 #include "perl.h"