https://github.com/libfuse/libfuse/blob/fuse-3.16.1/ChangeLog.rst#libfuse-3161-2023-08-08
One change can be expected to break some setups:
- Unsupported mount options are no longer silently accepted [1]
For example, sshfs built against the present libfuse 3.11.0,
`$ sshfs 127.0.0.1:/home/test/testdir /home/test/sshfs_mnt -o atime`
terminates successfully (with the mount point established), while when
built against 3.16.1, it outputs the error message `fuse: unknown
option(s): `-o atime'` and terminates with exit status 1.
Do not set FUSERMOUNT_DIR since we already set it though
NIX_CFLAGS_COMPILE.
Setting it twice results in a lot of warnings like this one:
<command-line>:0:0: warning: "FUSERMOUNT_DIR" redefined
which makes the build look potentially broken.
This doesn't affect the result but fuse3 will now build without any
warnings and building fuse yields less warnings.
Sergei Trofimovich