[R-SIG-Mac] Problem with readline when building R from source.

[Rolf Turner]

I (just now) attempted to build an older version of R (2.10.1)
from source.  The ./configure step came to a halt with an error:

> configure: error: --with-readline=yes (default) and headers/libs are not available

In the past I had been able to build R from source with no problems.

A short time ago, after installing R 2.11.0 (and having some problems with x11()
plotting) I attempted to go back to 2.10.1 by building from source, and found
that I couldn't, due to the foregoing configure error.

I was then told I could resolve the x11() plotting problems by updating my OS.
I finally got around to doing that --- just now --- and indeed this fixed the
x11() plotting problems.

I then figured I'd check and if it had also fixed the ``headers/libs are not
available'' problem --- it hadn't.

So can anyone tell me (preferably in monosyllables, i.e. please make it easy
to understand) how I can fix the ``headers/libs are not available'' problem?
I.e. how do I make the ``headers/libs'' available?

I ***would*** like to be able to build R from source, just as a fallback.

Ta.

	cheers,

		Rolf Turner


P. S.  My OS is Mac OS X 10.6.3.  The screen output from configure,  just before
the error, was:

        .
        .
        .
checking for library containing dlopen... none required
checking readline/history.h usability... yes
checking readline/history.h presence... yes
checking for readline/history.h... yes
checking readline/readline.h usability... yes
checking readline/readline.h presence... yes
checking for readline/readline.h... yes
checking for rl_callback_read_char in -lreadline... no
checking for main in -lncurses... yes
checking for rl_callback_read_char in -lreadline... no
checking for history_truncate_file... no

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