I found that the AMD's compiler needs to be given -I. to find a file in the current directory which is #include'd with "". I believe this is a bug on the preprocessor's part, since this behavior would be correct only for #include<>. I found no bugzilla where to report this. Is this post enough to get dev's attention?
This post is enough. Thanks I'll discuss this with our frontend person and see if they concur.