For sure.
Haiku x86 is something special. Also new to me since yesterday.
It has two modes. The better mode can be reached by doing "setarch x86" from the command line in a terminal.
To give you an example.
Open a terminal and do:
ld -v
setarch x86
ld -v
Knowing the above, I have tuned fpcupdeluxe (the pre-release) to handle this.
However, to enjoy the changes, you need to delete the fpc.cfg from the fpc binary directory, so fpcupdeluxe can generate a new one. That should be all you need.