Source: doublecmd Version: 0.6.6-1 I tried to build this on arm64 with fpc 3.0.0 and got this error:
.../doublecmd-0.6.6/components/doublecmd/dcosutils.pas(240,24) Error: (5000) Identifier not found "syscall_nr_lchown" On arm64, and other recent architectures, the lchown system call has been replaced by fchownat. The easiest way to avoid such problems is not to use system calls directly but instead to use wrapper functions in standard libraries. If you can't do that and are happy for your code only to work with recent Linux kernels then you could just replace lchown with fchownat (with the extra arguments). If you want your code to work with old kernels and with new architectures then you have to somehow determine at build time which of lchown and fchownat is available.
