TokuDB not recognized for compilation

Hello, I tried to pack the new 10.2.11 into Fedora.

Everything's fine but TokuDB, which won't compile anymore.
The Cmake won't recognize it as usable: "Performing Test TOKUDB_OK - Failed"

I think the issue lies within this commit: 7f1900705b
https://github.com/MariaDB/server/commit/7f1900705b
Within file "storage/tokudb/CMakeLists.txt"

The new code there is:

# tokudb requires F_NOCACHE, O_DIRECT, and designated initializers

CHECK_CXX_SOURCE_COMPILES(

"

#include <fcntl.h>

struct a {int b; int c; };

struct a d = { .b=1, .c=2 };

int main() { return F_NOCACHE + O_DIRECT; }

" TOKUDB_OK)

While the 'O_DIRECT' can be set

 The O_DIRECT, O_NOATIME, O_PATH, and  O_TMPFILE  flags  are  Linux-spe‐cific. One must define _GNU_SOURCE to obtain their definitions

The 'F_NOCACHE' is Darwin Kernel (Mac OS X) specific and not present in Fedora.