I am not an expert on this, but my first-blush assumption would be that you need some kind of environment-variable setting, to tell the make process where these Sybase-specific libraries and header files can be found.

A Google search for BLK_VERSION_150 (e.g...) also appears to produce a reasonable number of fairly fruitful-looking “hits...” I would expect that whatever solutions they describe will be directly applicable to your case, as well.