root@ubuntu:/home/xxx/lammps-22Aug18/src# sudo make ubuntu -j4
.......
.......
/usr/bin/x86_64-linux-gnu-ld: cannot find -lfftw3
collect2: error: ld returned 1 exit status
Makefile:93: recipe for target '../lmp_ubuntu' failed
make[1]: *** [../lmp_ubuntu] Error 1
make[1]: Leaving directory '/home/xxx/lammps-22Aug18/src/Obj_ubuntu'
Makefile:175: recipe for target 'ubuntu' failed
make: *** [ubuntu] Error 2
请问我这个error2是什么原因
![[惊哭]](/static/emoticons/u60cau54ed.png)
@金阳进