make不了，项目根目录和里面的子目录都make不了

[vanliao]

root@vanserver:/home/van/project/sthread# ll
total 1192
drwxr-xr-x 8 root root    4096 Oct  8 03:37 ./
drwxr-xr-x 5 root root    4096 Oct  8 03:37 ../
drwxr-xr-x 5 root root    4096 Oct  8 03:37 app/
-rwxr-xr-x 1 root root    5613 Oct  8 03:34 .clang-format*
-rwxr-xr-x 1 root root    8196 Oct  8 03:34 .DS_Store*
drwxr-xr-x 7 root root    4096 Oct  8 03:37 .git/
-rwxr-xr-x 1 root root      91 Oct  8 03:34 .gitignore*
-rwxr-xr-x 1 root root    5348 Oct  8 03:34 readme.md*
drwxr-xr-x 2 root root    4096 Oct  8 03:37 src/
-rwxr-xr-x 1 root root 1148809 Oct  8 03:34 sthread-master.zip*
drwxr-xr-x 5 root root    4096 Oct  8 03:37 stlib/
drwxr-xr-x 3 root root    4096 Oct  8 03:37 tests/
drwxr-xr-x 3 root root    4096 Oct  8 03:37 thirdparty/
-rwxr-xr-x 1 root root      27 Oct  8 03:34 WORKSPACE*
root@vanserver:/home/van/project/sthread# make
make: *** No targets specified and no makefile found.  Stop.

root@vanserver:/home/van/project/sthread# cd stlib/
root@vanserver:/home/van/project/sthread/stlib# ll
total 144
drwxr-xr-x 5 root root 4096 Oct  8 03:37 ./
drwxr-xr-x 8 root root 4096 Oct  8 03:37 ../
-rwxr-xr-x 1 root root 8196 Oct  8 03:34 .DS_Store*
-rwxr-xr-x 1 root root 1009 Oct  8 03:34 makefile*
-rwxr-xr-x 1 root root 5777 Oct  8 03:34 st_buffer.h*
-rwxr-xr-x 1 root root 5167 Oct  8 03:34 st_closure.h*
-rwxr-xr-x 1 root root 2958 Oct  8 03:34 st_def.h*
-rwxr-xr-x 1 root root 4126 Oct  8 03:34 st_epoll.h*
-rwxr-xr-x 1 root root 5522 Oct  8 03:34 st_hash_list.h*
-rwxr-xr-x 1 root root 5011 Oct  8 03:34 st_heap.h*
-rwxr-xr-x 1 root root 2325 Oct  8 03:34 st_heap_timer.h*
-rwxr-xr-x 1 root root 4236 Oct  8 03:34 st_kqueue.h*
-rwxr-xr-x 1 root root 3784 Oct  8 03:34 st_log.cc*
-rwxr-xr-x 1 root root 5087 Oct  8 03:34 st_log.h*
-rwxr-xr-x 1 root root 4245 Oct  8 03:34 st_netaddr.h*
-rwxr-xr-x 1 root root 3311 Oct  8 03:34 st_singleton.h*
-rwxr-xr-x 1 root root 6603 Oct  8 03:34 st_tailq.h*
-rwxr-xr-x 1 root root 1737 Oct  8 03:34 st_test.cc*
-rwxr-xr-x 1 root root 4991 Oct  8 03:34 st_test.h*
-rwxr-xr-x 1 root root 5636 Oct  8 03:34 st_util.h*
drwxr-xr-x 3 root root 4096 Oct  8 03:37 tests/
drwxr-xr-x 2 root root 4096 Oct  8 03:37 tiny/
drwxr-xr-x 2 root root 4096 Oct  8 03:37 ucontext/
root@vanserver:/home/van/project/sthread/stlib# make
make: *** No rule to make target 'st_ucontext.o', needed by 'libst.so'.  Stop.
root@vanserver:/home/van/project/sthread/stlib#