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From: Achim Gratz <Stromeko AT nexgo DOT de>
To: cygwin AT cygwin DOT com
Subject: Re: readline in Cygwin64?
References: <000e01d48a76$621a45d0$264ed170$@bonhard.uklinux.net>
Date: Sun, 02 Dec 2018 21:27:03 +0100
In-Reply-To: <000e01d48a76$621a45d0$264ed170$@bonhard.uklinux.net> (Fergus's	message of "Sun, 2 Dec 2018 19:36:55 -0000")
Message-ID: <87zhtny8rs.fsf@Rainer.invalid>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)
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Content-Type: text/plain

Fergus writes:
> Just installed Cygwin64. Beautiful.
> However, I need to build an executable. In Cygwin32 the build proceeds
> without exception but in Cygwin64 two error msgs are generated during the
> attempt:
> 1)	fatal error: readline/readline.h: No such file or directory
> 2)	cannot find -lreadline
> Both platforms Cygwin32(64) are identically bespoke and are constructed
> using the command
> setup-x86(_64).exe -P <blah>,readline,<blah>
> In Cygwin32 this results in the creation of all 3 files
> /usr/include/readline/readline.h
> /usr/lib/libreadline.a

Cygwin32 has an obsoletion package for "readline" that pulls in the
development headers as the old package had everything bundled.  On
Cygwin64 that readline package never existed, so you'll need
libreadline-devel.

> /usr/lib/libreadline.dll.a
> but none of these are created in Cygwin64. This is what breaks the build of
> the executable required.
> (Possibly it is another element of <blah> that has this consequence for
> Cygwin32, but whatever the trigger there is the same lack in Cygwin64.)
> Can these necessary components be recovered in Cygwin64 by some amendment to
> the "setup -P .. .." instruction?

cygcheck -p libreadline.dll.a


Regards,
Achim.
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