Pod install failed

After I installed the pod, build failed with:

```
ld: warning: directory not found for option '-L/Users/robinqu/Desktop/catworks/CatWorks/Pods/build/Debug-iphoneos'
ld: framework not found GPUImage
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```

GPUImage files do exist in the Pod folders.

Any clue to fix this?
