Cross-compile from Linux amd64 to FreeBSD 14.0 aarch64.

[fredvs]

Hello.

Congratulation for the cross-compiler Linux amd64 to FreeBSD aarch64, I was able to compile (complicated graphic + audio MSEgui) projects. And the binary runs nearly out-of-the-box on a real Rpi FreeBSD 14.0 aarch64 machine. The only thing needed is to do, on the real machine: $ brandelf -t freebsd <TheCrosscompiledBinary>

Could it be possible to do a "brandelf" at cross-compiling? But I did not find any "brandelf" for Linux, maybe there is a other solution?

Note that re-compiling fpc 3.3.1 fails on a real FreeBSD 14.0 aarch64 because in the /compiler/Makefile after each pre-compiler brandelf is missing and so the pre-compiler can not run.

Here a /compiler/Makefile patched to enable compilation of the compiler on a real FreeBSD 14.0 machine: Makefile_fpc331_compiler_freebsd_aarch64.zip

Note too that compilation of fpc on a real FreeBSD 14.0 machine fails when trying to assemble system.ppu but this is a other story, it is not about cross-compilation.

So to resume, fpc himself at the moment can be done only by cross-compilation.

Also, it would be great if the /compiler/systems/t_bsd.pas uses the correct linker and does the "brandelf" at end of compilation: Line 156 add this:

    else if target_info.system=system_aarch64_freebsd then  // fix for freebsd aarch64
      DynamicLinker:='/libexec/ld-elf.so.1'   

and line 560 add this:

 {$if defined(freebsd) and defined(CPUAARCH64)}
  cmdstr := '-t freebsd ' +  current_module.exefilename; 
  DoExec('brandelf',cmdstr,false,false);
  {$endif}

The patched t_bsd.pas solve it, I tried it and with it people can compile the app on the real machine and dont need to do anything after compilation/linking. t_bsd.pas.zip

Here fpc 3.3.1.freebsd aarch64 binary with the patch for t_bsd.pas: https://github.com/fredvs/test/releases/tag/fpc323 See asset: fpc-331_freebsd-aarch64_fix_linker_ld-elf_so_1.zip

Fre;D

[LongDirtyAnimAlf]

Thanks for your work on this issue ! However, I will not implement the brandelf fix. Reason. FPC must generate an elf binary with the right signature for FreeBSD. So, a patch must be made for FPC to get things right ! Its not the task of fpcupdeluxe to change the signature. So, I am thankful for your work, but this is 100% an issue that needs to be addressed by FP itself ! Can you agree with this ?

[fredvs]

Hello Don. OK, I agree with you.