btrfs/crypto/xxhash.h:485:36: error: missing ‘)’ after ‘__has_attribute’

[robert-scheck]

Building latest partclone 0.3.33 from release tarball on Fedora Rawhide using GCC 15 fails like this:

In file included from btrfs/crypto/hash.c:19:
./btrfs/crypto/xxhash.h:485:36: error: missing ‘)’ after ‘__has_attribute’
  485 | #if XXH_HAS_C_ATTRIBUTE(fallthrough) || XXH_HAS_CPP_ATTRIBUTE(fallthrough)
      |                                    ^
./btrfs/include/kerncompat.h:287:55: error: missing binary operator before token ‘(’
  287 | #  define fallthrough                   __attribute__((__fallthrough__))
      |                                                       ^
./btrfs/crypto/xxhash.h:468:51: note: in definition of macro ‘XXH_HAS_C_ATTRIBUTE’
  468 | # define XXH_HAS_C_ATTRIBUTE(x) __has_c_attribute(x)
      |                                                   ^
./btrfs/crypto/xxhash.h:485:25: note: in expansion of macro ‘fallthrough’
  485 | #if XXH_HAS_C_ATTRIBUTE(fallthrough) || XXH_HAS_CPP_ATTRIBUTE(fallthrough)
      |                         ^~~~~~~~~~~

[Thomas-Tsai]

I create a new Debian with gcc-15 and I have the same problem here.
I would update btrfs-tools.

[robert-scheck]

I didn't try this, just had a quick look whether I could find an obvious commit.