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I was told by local plumbing supply that you can glue ABS fittings to PVC pipe with all purpose solvent. Any comments?
That doesn't sound right to me. PVC and ABS are two different formulations. Their respective "glue" is actually a solvent that melts the surface of the material, then evaporates, the end result is that the two pieces become one, physically melted or fused together. While a single solvent may do a similar thing to both materials, I would doubt the integrity of the joint with the dissimilar materials.
See also this article, pay attention to the paragraph "To prime or not."