https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110462
--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:ff29ee6af88f709e08ee467869d8c1b13889a724 commit r14-2191-gff29ee6af88f709e08ee467869d8c1b13889a724 Author: Jonathan Wakely <jwak...@redhat.com> Date: Wed Jun 28 19:10:29 2023 +0100 libstdc++: Do not use off64_t in calls to copy_file_range [PR110462] Although the copy_file_range(2) man page shows the arguments as off64_t* that is not portable. For musl there is no off64_t type, as off_t is always 64-bit. Use the loff_t type which is always 64-bit even if off_t isn't. We could just use off_t because the filesystem library is compiled with _FILE_OFFSET_BITS=64, but loff_t is the more correct type for this interface. libstdc++-v3/ChangeLog: PR libstdc++/110462 * acinclude.m4 (GLIBCXX_CHECK_FILESYSTEM_DEPS): Check that copy_file_range can be called with loff_t* arguments. * configure: Regenerate. * src/filesystem/ops-common.h (copy_file_copy_file_range): Use loff_t for offsets.