Обсуждение: /usr/local/include search

Why don't we search in /usr/local/include and /usr/local/lib for
libreadline.a by default, and require the flags to configure?

Seems we should have those directories searched by default in configure.
Most software does this with configure already.

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Bruce Momjian <maillist@candle.pha.pa.us> writes:
> Why don't we search in /usr/local/include and /usr/local/lib for
> libreadline.a by default, and require the flags to configure?

I'm pretty leery of having configure make unsupported assumptions
about the layout of my filesystem.  Not everyone keeps this sort
of thing in /usr/local, and it's *not* necessarily harmless to look
there without being told.  For example, /usr/local might contain
libraries that are incompatible with the compiler you're trying to
use --- I actually had that problem a few weeks ago when I was
experimenting with egcs.

I think it's fine that configure defaults to looking only in whatever
directories the compiler searches automatically.  gcc, for one, is
usually configured to search in /usr/local by default, so the whole
issue is moot for anyone using gcc.
        regards, tom lane