[Buildroot] [PATCH v2] package/libtool: Reduce target package to libltdl only

[Yann E. MORIN <yann.morin.1998@free.fr>]

Alexander, All,

Arnout, licensing question for you at the end.

On 2018-11-24 17:54 +0100, Alexander Sverdlin spake thusly:
> This will save 1700K on target filesystem (as tested on ARM, i686).
> 
> Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
> ---
> Changelog:
> v2:
> - rework target libtool instead of new package/libltdl
> 
>  package/libtool/libtool.mk | 16 +++++++++++++---
>  1 file changed, 13 insertions(+), 3 deletions(-)
> 
> diff --git a/package/libtool/libtool.mk b/package/libtool/libtool.mk
> index bf97ee12b5..b25e058bf4 100644
> --- a/package/libtool/libtool.mk
> +++ b/package/libtool/libtool.mk
> @@ -7,12 +7,22 @@
>  LIBTOOL_VERSION = 2.4.6
>  LIBTOOL_SOURCE = libtool-$(LIBTOOL_VERSION).tar.xz
>  LIBTOOL_SITE = $(BR2_GNU_MIRROR)/libtool
> +
> +LIBTOOL_SUBDIR = libltdl
> +HOST_LIBTOOL_SUBDIR = .
> +
>  LIBTOOL_INSTALL_STAGING = YES
> -LIBTOOL_CONF_ENV = HELP2MAN=true

I guess HELP2MAN is no longer needed because there is no doc to build in
the libltdl subdir, right?

> +LIBTOOL_CONF_OPTS = --enable-ltdl-install
> +HOST_LIBTOOL_CONF_OPTS =

This host variable does inherit the value from the target variant, so
you don't need to specify an empty HOST_LIBTOOL_CONF_OPTS.

>  LIBTOOL_DEPENDENCIES = host-m4
>  HOST_LIBTOOL_DEPENDENCIES = host-m4
> -LIBTOOL_LICENSE = GPL-2.0+
> -LIBTOOL_LICENSE_FILES = COPYING
> +
> +LIBTOOL_LICENSE = LGPLv2.1
> +LIBTOOL_LICENSE_FILES = $(LIBTOOL_SUBDIR)/COPYING.LIB
> +HOST_LIBTOOL_LICENSE = GPL-2.0+
> +HOST_LIBTOOL_LICENSE_FILES = COPYING

So, the host presumably also builds libltdl, no? Thus, we should include
its licensing information too;

    HOST_LIBTOOL_LICENSE = GPL-2.0+, LGPLv2.1 (libltdl)
    HOST_LIBTOOL_LICENSE_FILES = COPYING $(LIBTOOL_SUBDIR)/COPYING.LIB

Not sure about that one, wait a bit for others to confirm before
respinning the patch.

Regards,
Yann E. MORIN.

>  HOST_LIBTOOL_CONF_ENV = MAKEINFO=true
>  HOST_LIBTOOL_LIBTOOL_PATCH = NO
> -- 
> 2.19.1
> 

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