linux-kernel - Re: [PATCH 2/2] Use config scripts to detect ncurses libs for nconfig

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Date:	Wed, 27 Feb 2013 20:02:59 +0100
From:	"Yann E. MORIN" <yann.morin.1998@...e.fr>
To:	linux-kbuild@...r.kernel.org
Cc:	jlec@...too.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Use config scripts to detect ncurses libs for nconfig

Justin, All,

On Wednesday 27 February 2013 jlec@...too.org wrote:
> From: Justin Lecher <jlec@...too.org>
> 
> When building ncurses with --with-termlib several symbols get moved from
> libncurses.so to libtinfo.so. Thus when linking with libncurses.so, one
> additionally needs to link with libtinfo.so.
> 
> Ncurses provides a config script (ncurses5-config) to assist finding ncurses.
> This patch makes use of it to detect the necessary libs for linking of the
> ncurses nconfig dialog.
> 
> Signed-off-by: Justin Lecher <jlec@...too.org>

Ditto for the subject, as for your previous patch.

> ---
>  scripts/kconfig/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
> index 3091794..7ddbf98 100644
> --- a/scripts/kconfig/Makefile
> +++ b/scripts/kconfig/Makefile
> @@ -216,7 +216,7 @@ HOSTCFLAGS_gconf.o	= `pkg-config --cflags gtk+-2.0 gmodule-2.0 libglade-2.0` \
>  
>  HOSTLOADLIBES_mconf   = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ldflags $(HOSTCC))
>  
> -HOSTLOADLIBES_nconf	= -lmenu -lpanel -lncurses
> +HOSTLOADLIBES_nconf	= -lmenu -lpanel `ncursesw5-config --libs 2>/dev/null || ncurses5-config --libs 2>/dev/null`

Long-line. Also, this expands the `...` in the shell, not in the Makefile.
I'd rather have the expansion be done by the Makefile:

HOSTLOADLIBES_nconf	= -lmenu -lpanel
HOSTLOADLIBES_nconf	+= $(shell    ncursesw5-config --libs 2>/dev/null \
				   || ncurses5-config --libs 2>/dev/null  )

Regards,
Yann E. MORIN.

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