Date: Mon, 24 Oct 2011 05:40:28 -0400 From: Thomas Dickey <dickey@radix.net> To: "John R. Levine" <johnl@iecc.com> Cc: Thomas Dickey <dickey@radix.net>, freebsd-questions@freebsd.org Subject: Re: Updating emacs fails Message-ID: <20111024094028.GA27596@saltmine.radix.net> In-Reply-To: <alpine.BSF.2.00.1110240831490.5623@joyce.lan> References: <20111023225808.GA6341@saltmine.radix.net> <20111023232336.2351.qmail@joyce.lan> <20111023234004.GA12404@saltmine.radix.net> <alpine.BSF.2.00.1110240831490.5623@joyce.lan>
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On Mon, Oct 24, 2011 at 08:32:30AM +0200, John R. Levine wrote:
> >>It sounds to me like the right thing to do is to fix emacs' configurati=
on
> >>so it always uses the base system ncurses whether or not the package
> >>version is there. Right?
> >
> >maybe/maybe not. It depends on what emacs needs - whether it only works
> >with either its own termcap module or a conventional termcap library in
> >the system. Probably its installation documentation tells what's needed.
>=20
> If you look at the build log I posted, it's failing because it's trying t=
o=20
> link in the system termcap library and failing because ncurses doesn't=20
> provide it.
In other places, "-ltermcap" is symlinked to -lncurses
("provide" can be taken in more than one way - the functions are always
available, whether or not the port is written to use them).
A quick look at the emacs 23.3 sources shows various things relevant to
ncurses:
a) the configure script makes a special check on netbsd to use
ncurses rather than the termcap library.
b) it has a very old comment suggesting where to get the terminfo
or termcap sources (pre-1997).
c) the NEWS file points out that LIBS_TERMCAP is either terminfo
or termcap.
d) src/s/freebsd.h defines LIBS_TERMCAP to -lncurses unless the
system is before FreeBSD 4.0
e) src/Makefile.in uses machine.h (in this case derived from the
previously-mentioned file).
There's enough in the emacs sources to make it pretty clear that a
failure to have emacs find the termcap functions would be a problem
in the emacs port - emacs prefers -lncurses to -ltermcap unless it's
being overridden.
--=20
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net
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