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Wed, 4 Mar 2026 07:23:19 +0000 Content-Type: multipart/alternative; boundary="------------0664Sv030bTpCavIogCuU5X6" Message-ID: <519f845e-41a2-4cc3-8b8c-ff57b743a0ce@windriver.com> Date: Wed, 4 Mar 2026 15:23:12 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [OE-core] [PATCH V3] lua: upgrade from 5.4.8 to 5.5.0 To: Ross Burton Cc: "openembedded-core@lists.openembedded.org" References: <39D9B021-BF4B-4050-8D22-53C33E84F8C9@arm.com> <20260227070858.2687898-1-changqing.li@windriver.com> Content-Language: en-US From: Changqing Li In-Reply-To: X-ClientProxiedBy: KL1PR02CA0015.apcprd02.prod.outlook.com (2603:1096:820:c::20) To DS0PR11MB7312.namprd11.prod.outlook.com (2603:10b6:8:11f::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR11MB7312:EE_|DM4PR11MB6526:EE_ X-MS-Office365-Filtering-Correlation-Id: 09126ad1-ba59-4f2a-d0cc-08de79bee941 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: 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definitions=main-2603040059 List-Id: X-Webhook-Received: from 45-33-107-173.ip.linodeusercontent.com [45.33.107.173] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Wed, 04 Mar 2026 07:23:32 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/232350 --------------0664Sv030bTpCavIogCuU5X6 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mx0a-0064b401.pphosted.com id 6244BLvo3916912 On 3/3/26 23:16, Ross Burton wrote: > CAUTION: This email comes from a non Wind River email account! > Do not click links or open attachments unless you recognize the sender = and know the content is safe. > > Hi, > >> On 27 Feb 2026, at 07:08, Changqing Li via lists.openembedded.org wrote: >> Refer [1], PLATS linux-readline is moved, and readline is changed to >> load dynamically, keep readline as PACKAGECONFIG to allow user to remo= ve >> readline dependency. > As is traditional with people using dlopen(), this is now broken=E2=80=A6 > > Lua defaults to dlopen() support being enabled (LUA_USE_DLOPEN is defin= ed on linux) and the readline library is set to libreadline.so. > > So the PACKAGECONFIG is not doing the right thing anymore: having readl= ine in the sysroot doesn=E2=80=99t change the build, and has no impact on= the runtime packages. > > The obvious answer is to change the PACKAGECONFIG to =E2=80=9C,,,readli= ne=E2=80=9D so that there=E2=80=99s still an option that has the effect o= f enabling readline in lua, but that also won=E2=80=99t work as the on-di= sk file isn=E2=80=99t called libreadline.so unles= s you install the -dev package=E2=80=A6. This means we should also set LU= A_READLINELIB to "libreadline.so.8=E2=80=9D. > > Bonus points for adding readline as a build dependency and looking up w= hat the libreadline.so symlink resolves to, but I= don=E2=80=99t expect the readline soname to change in the near future so= this can be considered overkill. Hi, Ross Thanks for pointing out this.=C2=A0 How about we just install -dev packag= es?=20 so that we don't need a local patch to set LUA_READLINELIB to=20 "libreadline.so.8=E2=80=9D. And in this way, we are align with lua upstream expected (if readline-dev=20 installed, readline is used, otherwise, not use readline) Here is the diff based on V3: =C2=A0PACKAGECONFIG ??=3D "readline" -PACKAGECONFIG[readline] =3D ",,readline" +PACKAGECONFIG[readline] =3D ",,,readline-dev" =C2=A0TARGET_CC_ARCH +=3D " -fPIC ${LDFLAGS}" =C2=A0EXTRA_OEMAKE =3D "'CC=3D${CC} -fPIC' 'MYCFLAGS=3D${CFLAGS} -fPIC'=20 MYLDFLAGS=3D'${LDFLAGS}' 'AR=3Dar rcD' 'RANLIB=3Dranlib -D'" @@ -64,3 +64,5 @@ BBCLASSEXTEND =3D "native nativesdk" =C2=A0inherit multilib_script =C2=A0MULTILIB_SCRIPTS =3D "${PN}-dev:${includedir}/luaconf.h" + +INSANE_SKIP:${PN} +=3D "dev-deps" With V3 patch: root@qemux86-64:~# lua -i -W Lua 5.5.0=C2=A0 Copyright (C) 1994-2025 Lua.org, PUC-Rio Lua warning: library 'libreadline.so' not found > With the V4 patch: root@qemux86-64:/usr/lib# lua -i -W Lua 5.5.0=C2=A0 Copyright (C) 1994-2025 Lua.org, PUC-Rio > if you think this is ok,=C2=A0 I will send a V4 like this. Regards Changqing > > Ross --------------0664Sv030bTpCavIogCuU5X6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mx0a-0064b401.pphosted.com id 6244BLvo3916912


On 3/3/26 23:16, Ross Burton wrote: 
CAUTION: This email comes fr=
om a non Wind River email account!
Do not click links or open attachments unless you recognize the sender an=
d know the content is safe.

Hi,


On 27 Feb 2026, at 07:08, =
Changqing Li via lists.openembedded.org <=
;changqing.li=3Dwindriver.com@lists.openembedded.org> wrote:
Refer [1], PLATS linux-readline is moved, and readline is changed to
load dynamically, keep readline as PACKAGECONFIG to allow user to remove
readline dependency.

As is traditional with people using dlopen(), this is now broken=E2=80=A6

Lua defaults to dlopen() support being enabled (LUA_USE_DLOPEN is defined=
 on linux) and the readline library is set to libreadline.so <http://libread=
line.so/>.

So the PACKAGECONFIG is not doing the right thing anymore: having readlin=
e in the sysroot doesn=E2=80=99t change the build, and has no impact on t=
he runtime packages.

The obvious answer is to change the PACKAGECONFIG to =E2=80=9C,,,readline=
=E2=80=9D so that there=E2=80=99s still an option that has the effect of =
enabling readline in lua, but that also won=E2=80=99t work as the on-disk=
 file isn=E2=80=99t called libreadline.so <http://libreadline.so/> un=
less you install the -dev package=E2=80=A6. This means we should also set=
 LUA_READLINELIB to "libreadline.so.8=E2=80=9D.

Bonus points for adding readline as a build dependency and looking up wha=
t the libreadline.so <http://libreadline.so/> symlink resolves to, bu=
t I don=E2=80=99t expect the readline soname to change in the near future=
 so this can be considered overkill.

Hi, Ross

Thanks for pointing out this.  How about we just install -dev packages? so that we don't need a local patch to set LUA_READLINELIB to "libreadline.so.8=E2= =80=9D. And

in this way, we are align w= ith lua upstream expected (if readline-dev installed, readline is used, = otherwise, not use readline)

Here is the diff based on V3= :

 PACKAGECONFIG ??=3D "readline"
-PACKAGECONFIG[readline] =3D ",,readline"
+PACKAGECONFIG[readline] =3D ",,,readline-dev"
 
 TARGET_CC_ARCH +=3D " -fPIC ${LDFLAGS}"
 EXTRA_OEMAKE =3D "'CC=3D${CC} -fPIC' 'MYCFLAGS=3D${CFLAG= S} -fPIC' MYLDFLAGS=3D'${LDFLAGS}' 'AR=3Dar rcD' 'RANLIB=3Dranlib -D'" @@ -64,3 +64,5 @@ BBCLASSEXTEND =3D "native nativesdk"  
 inherit multilib_script
 MULTILIB_SCRIPTS =3D "${PN}-dev:${includedir}/luaconf.h&= quot;
+
+INSANE_SKIP:${PN} +=3D "dev-deps"

With V3 patch:

root@qemux86-64:~# lua -i -W
Lua 5.5.0  Copyright (C) 1994-2025 Lua.org, PUC-Rio
Lua warning: library 'libreadline.so' not found
>

With the V4 patch:

root@qemux86-64:/usr/lib# lua -i -W
Lua 5.5.0  Copyright (C) 1994-2025 Lua.org, PUC-Rio
> 

if you think this is ok,  I will send a V4 like this.

Regards

Changqing  


Ross
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