Inline detection problem

[Daniel Sands]

I recently ran into a problem where one building package detects
"inline" and then does a recursive configure on another package if it
exists in the same source tree, which also detects "inline" but uses the
same cache file.  The problem is that the "inside" package uses gcc
-ansi, which now removes the old "inline", but it was already detected
as "inline" and cached into the other one.  So is there a reason to "do
nothing" if "inline" works in one case, when ANSI removes this
definition?