gistfile1.txt

"this produces an output like:
" /path/file1.txt
" /path/file2.txt
" /path/file3.txt
function! GoFiles() 
    let out=system("go list -f $'{{range $f := .GoFiles}}{{$.Dir}}/{{$f}}\n{{end}}'")
    echo out
endfunction



" I need to append the files above to this command:
CompilerSet makeprg=go\ build\ -o\ /dev/null\ 

" like:
CompilerSet makeprg=go\ build\ -o\ /dev/null\ /path/file1.txt /path/file2.txt /path/file3.txt