[Buildroot] [PATCH 02/18] package/mplayer: add optional giflib support
arnout at mind.be
Tue Mar 31 18:38:57 UTC 2015
On 30/03/15 23:06, Thomas Petazzoni wrote:
> On Mon, 30 Mar 2015 22:56:58 +0200, Thomas Petazzoni wrote:
>>> +ifeq ($(BR2_PACKAGE_GIFLIB),y)
>>> +MPLAYER_DEPENDENCIES += giflib
>>> +MPLAYER_EXTRA_LIBS += -lgif
>> Any reason not to use --enable-gif / --disable-gif here? Then you don't
>> need to pass a --extra-libs value. I've applied the patch with this
>> change, as it seems to build fine. Let me know if that causes a problem.
> Hum, looking at the ncurses case, things seem to be a bit annoying:
> echocheck "termcap"
> if test "$_termcap" = auto ; then
> for ld_tmp in "-lncurses" "-ltinfo" "-ltermcap"; do
> statement_check term.h 'tgetent(0, 0)' $ld_tmp &&
> extra_ldflags="$extra_ldflags $ld_tmp" && _termcap=yes && break
> if test "$_termcap" = yes ; then
> def_termcap='#define HAVE_TERMCAP 1'
> test $ld_tmp && res_comment="using $ld_tmp"
> def_termcap='#undef HAVE_TERMCAP'
> echores "$_termcap"
> So, if you explicitly pass --enable-termcap, autodetection is not done,
> and you have to pass -lncurses explicitly in --extra-libs. Otherwise,
> if you don't use --enable-termcap and let the autodetection do its
> work, it detects -lncurses automatically.
> So I'm not sure which one to choose:
> *) Autodetection, which avoids the need for passing explicit -l<foo>
> values, but has the drawback of autodetection: we're not explicitly
> saying which features we want to enable, which may cause mis-use of
> certain libraries.
> *) No autodetection, which forces us to pass the proper -l<foo> value
> for each dependency.
For the positive case (--enable-termcap), autodetection should be fine. What we
want to catch is that termcap happens to have been built before, so we want an
Of course, there should be a comment why we don't put the --enable-termcap.
Arnout Vandecappelle arnout at mind be
Senior Embedded Software Architect +32-16-286500
G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
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