Thanks for your reply!

Maybe I didn't clearly describe my problem. I'm really sorry. I will describe clearly my problem below.

1. The software I installed

ubuntu 18.04

qt 4.7.3

make 4.1

2. Problem
 
run ./build.linux -j4

Error:
    compilation terminated
    makefile:212:recipe for target 'moc_sync_z_cut_plugin.o' failed  
    make:***['moc_sync_z_cut_plugin.o'] Error 1
    make:*** waitting for unfinished jobs....
    makefile:206:recipe for target 'sync_z_cut_plugin.o' failed
    make:*** [sync_z_cut_plugin.o] Error 1

I guess it's a question of 'make', but 'make' works

3. Last but not least

Because the platform is not convenient for uploading photos, I wrote a document on github detailing my problem. (https://github.com/BingooYang/Build-Vaa3...)

Thanks!