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[asterisk-users] compilation of asterisk 1.4.19 with ilbc already on system


 
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rentorbuy at yahoo.com
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PostPosted: Sun Apr 13, 2008 12:40 pm    Post subject: [asterisk-users] compilation of asterisk 1.4.19 with ilbc al Reply with quote
I already have ilbc installed on my system. The files
are:

/usr/include/ilbc/iLBC_decode.h
/usr/include/ilbc/iLBC_define.h
/usr/include/ilbc/iLBC_encode.h
/usr/lib/libilbc.a
/usr/lib/libilbc.la
/usr/lib/libilbc.so -> libilbc.so.0.0.0
/usr/lib/libilbc.so.0 -> libilbc.so.0.0.0
/usr/lib/libilbc.so.0.0.0

However, if I do a "make" in asterisk-1.4.19, it will
not detect that libilbc.a is already on the system. If
I manually remove "codec_ilbc" from MENUSELECT_CODECS
in menuselect.makeopts then codecs/codec_ilbc.c will
compile to codec_ilbc.o because it finds the header
files (/usr/include/ilbc/iLBC_{en,de}code.h) but it
will fail to compile to codec_ilbc.so because it will
try to make the ilbc subdir which I haven't downloaded
the ilbc source code to.

How can I tell the make system in 1.4.19 that ilbc is
already on the system and that it should link to
/usr/lib/libilbc.a?

Shouldn't the configure script do that?
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kpfleming at digium.com
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PostPosted: Tue Apr 15, 2008 6:51 pm    Post subject: [asterisk-users] compilation of asterisk 1.4.19 with ilbc al Reply with quote
Vieri wrote:

Quote:
How can I tell the make system in 1.4.19 that ilbc is
already on the system and that it should link to
/usr/lib/libilbc.a?

Shouldn't the configure script do that?

No; the Asterisk build system has never had support for using a
system-provided version of the iLBC library.

Whoever provided you that library could easily run afoul of the same
licensing issues that caused us to remove the code from our Asterisk
distribution, and using that library does not obviate you from the need
to register your intent to use the codec if you are using it for
commercial purposes.

--
Kevin P. Fleming
Director of Software Technologies
Digium, Inc. - "The Genuine Asterisk Experience" (TM)
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rentorbuy at yahoo.com
Guest
PostPosted: Wed Apr 16, 2008 1:10 pm    Post subject: [asterisk-users] compilation of asterisk 1.4.19 with ilbc al Reply with quote
--- "Kevin P. Fleming" <kpfleming at digium.com> wrote:

Quote:
Vieri wrote:

Quote:
How can I tell the make system in 1.4.19 that ilbc
is
Quote:
already on the system and that it should link to
/usr/lib/libilbc.a?

Shouldn't the configure script do that?

No; the Asterisk build system has never had support
for using a
system-provided version of the iLBC library.

Whoever provided you that library could easily run
afoul of the same
licensing issues that caused us to remove the code
from our Asterisk
distribution, and using that library does not
obviate you from the need
to register your intent to use the codec if you are
using it for
commercial purposes.

--
Kevin P. Fleming
Director of Software Technologies
Digium, Inc.

Thanks but I'm curious.
I'm using Gentoo Linux and there's an "ebuild" (ie.
"package") to install the iLBC development library.
Gentoo "ebuilds" are scripts that automatically
download upstream source code, compile and install (no
"binary packages").
As far as licensing is concerned, all ebuilds are
required to specify the type of license. So in case of
iLBC, the "LICENSE" keyword points to
http://www.ilbcfreeware.org/documentation/gips_iLBClicense.pdf.
Thus, when iLBC is installed via this ebuild the user
knows the license its under (and therefore accepts it
whether for commercial or personal use).

I don't see the legal problem with installing iLBC
this way.

So I had to slightly change the asterisk build
process:
1) modify the codecs Makefile:
--- codecs/Makefile.orig 2008-04-14 12:48:09.000000000
+0200
+++ codecs/Makefile 2008-04-14 12:49:46.000000000
+0200
@@ -29,7 +29,7 @@
LOADABLE_MODS:=
endif

-LIBILBC:=ilbc/libilbc.a
+LIBILBC:=/usr/lib/libilbc.a
LIBLPC10:=lpc10/liblpc10.a

all: _all
@@ -56,6 +56,6 @@
$(if $(filter
codec_lpc10,$(EMBEDDED_MODS)),modules.link,codec_lpc10.so):
$(LIBLPC10)

$(LIBILBC):
- @$(MAKE) -C ilbc all ASTCFLAGS="$(filter-out
-Wmissing-prototypes
-Wmissing-declarations,$(ASTCFLAGS))
$(AST_NO_STRICT_OVERFLOW)"
+ @echo "Using /usr/lib/libilbc.a"

$(if $(filter
codec_ilbc,$(EMBEDDED_MODS)),modules.link,codec_ilbc.so):
$(LIBILBC)
2) remove codec_ilbc from MENUSELECT_CODECS in
menuselect.makeopts so that codec_ilbc gets built by
asterisk:
make menuselect.makeopts
sed -i -e "s:codec_ilbc::" menuselect.makeopts
3) make asterisk as usual

So basically I'm wondering if the Asterisk
make/configure process could do steps 1 and 2
automagically for me.

Vieri

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rentorbuy at yahoo.com
Guest
PostPosted: Thu Apr 17, 2008 2:19 am    Post subject: [asterisk-users] compilation of asterisk 1.4.19 with ilbc al Reply with quote
--- "Kevin P. Fleming" <kpfleming at digium.com> wrote:

Quote:
Vieri wrote:

Quote:
So basically I'm wondering if the Asterisk
make/configure process could do steps 1 and 2
automagically for me.

I can't find any other Linux distribution that
provides libilbc, so this
would be a very Gentoo-specific change if we did it.
Also, we'll have
the iLBC source code back in the main distribution
in the near future
when the licensing issues are worked out, so for
everyone else this will
become a non-issue.

I didn't know that. If that's the case then never mind
my request.

Quote:
Do you see any particular advantage to using the
system-provided
libilbc, given that we use it in static (not shared
object) form and it
would have to be relinked into Asterisk if it got
upgraded anyway?

No real advantage but I had to patch Gentoo's Asterisk
1.4.19 ebuild (ie "package") to avoid losing
/usr/lib/asterisk/modules/codec_ilbc.so and I took
advantage of the fact that there already exists an
ilbc ebuild for Gentoo.
If I want Gentoo users to upgrade seamlessly via the
package management system I can think of only two
choices:

1) change the 1.4.19 ebuild so that it runs the
contrib/scripts/getilbcsource.sh before compiling (but
I would still need to patch that script to remove the
"read")

2) change the * 1.4.19 ebuild so that it can take
advantage of ilbc provided by another ebuild (via
dependency).

I proposed option 2 for Gentoo users and it's working
fine for my system.
However, if you plan to get the iLBC source code back
in the main distribution soon then that's even better
and as I wrote before, you can ignore my request.

Thanks,
Vieri

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