[{"id":27027,"web_url":"https://patchwork.libcamera.org/comment/27027/","msgid":"","date":"2023-05-03T12:51:38","subject":"Re: [libcamera-devel] [PATCH 2/2] v4l2: Move the v4l2-compat to\n\tlibcamera/","submitter":{"id":95,"url":"https://patchwork.libcamera.org/api/people/95/","name":"Javier Martinez Canillas","email":"javierm@redhat.com"},"content":"Hello Kieran,\n\nThanks for your patch.\n\nOn 5/1/23 17:55, Kieran Bingham wrote:\n> Move the v4l2-compat.so shared library installation to the libcamera\n> library directory. This is the same location that IPA modules live and\n> will allow the 'generically sounding' v4l2-compat.so to be more clearly\n> identified as a libcamera compatibility layer.\n> \n> Signed-off-by: Kieran Bingham \n> ---\n> We could also rename this to libcamera-v4l2-compat.so, and/or we could\n> also re-consider whether the libcamera-hal.so file should also live\n> under the libcamera/ libdir by default.\n> \n> src/v4l2/meson.build | 3 ++-\n> 1 file changed, 2 insertions(+), 1 deletion(-)\n> \n> diff --git a/src/v4l2/meson.build b/src/v4l2/meson.build\n> index f132103cb503..114fddf7302a 100644\n> --- a/src/v4l2/meson.build\n> +++ b/src/v4l2/meson.build\n> @@ -31,6 +31,7 @@ v4l2_compat = shared_library('v4l2-compat',\n> v4l2_compat_sources,\n> name_prefix : '',\n> install : true,\n> + install_dir : libcamera_libdir,\n> dependencies : [libcamera_private, libdl],\n> cpp_args : v4l2_compat_cpp_args)\n> \n> @@ -38,7 +39,7 @@ v4l2_compat = shared_library('v4l2-compat',\n> # adaptation layer.\n> \n> cdata = configuration_data()\n> -cdata.set('LIBCAMERA_V4L2_SO', get_option('prefix') / get_option('libdir') / 'v4l2-compat.so')\n> +cdata.set('LIBCAMERA_V4L2_SO', get_option('prefix') / libcamera_libdir / 'v4l2-compat.so')\n>\n\nAs Laurent mentioned in another thread, I think that:\n\n+cdata.set('LIBCAMERA_V4L2_SO', get_option('libexecdir') / 'libcamera' / 'v4l2-compat.so')\n\nwould be better and more consistent with how other projects install\nshared objects that are not meant to be public.\n\nThat would also solve the issue I had when trying to enable the v4l2\ncompatibility layer and ship it in a separate libcamera-v4l2 sub-package.\n\nIf you post a v2 with that change, feel free to add my:\n\nReviewed-by: Javier Martinez Canillas ","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 406FEC0DA4\n\tfor ;\n\tWed, 3 May 2023 12:51:45 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id B5FCF627DE;\n\tWed, 3 May 2023 14:51:44 +0200 (CEST)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id DB27861EAF\n\tfor ;\n\tWed, 3 May 2023 14:51:42 +0200 (CEST)","from mail-wm1-f71.google.com (mail-wm1-f71.google.com\n\t[209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n\tus-mta-279-CC848N5iN3W1_hbMDAsz2g-1; 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\n\tWed, 03 May 2023 05:51:39 -0700 (PDT)","by 2002:a05:600c:1d83:b0:3f1:88b:bd40 with SMTP id\n\tp3-20020a05600c1d8300b003f1088bbd40mr1319030wms.14.1683118299127; \n\tWed, 03 May 2023 05:51:39 -0700 (PDT)"],"X-Google-Smtp-Source":"ACHHUZ5cfCwEwU/RAom4u7VM/L8xZasJswhq7SeEi9M9pSFpv6BkVhPVnIB8OhJ59Bz54VRN/yhTfQ==","Message-ID":"","Date":"Wed, 3 May 2023 14:51:38 +0200","MIME-Version":"1.0","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101\n\tThunderbird/102.10.0","To":"Kieran Bingham ,\n\tlibcamera devel ","References":"<20230501155507.116039-1-kieran.bingham@ideasonboard.com>\n\t<20230501155507.116039-3-kieran.bingham@ideasonboard.com>","In-Reply-To":"<20230501155507.116039-3-kieran.bingham@ideasonboard.com>","X-Mimecast-Spam-Score":"0","X-Mimecast-Originator":"redhat.com","Content-Language":"en-US","Content-Type":"text/plain; charset=UTF-8","Content-Transfer-Encoding":"7bit","Subject":"Re: [libcamera-devel] [PATCH 2/2] v4l2: Move the v4l2-compat to\n\tlibcamera/","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","From":"Javier Martinez Canillas via libcamera-devel\n\t","Reply-To":"Javier Martinez Canillas ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":27029,"web_url":"https://patchwork.libcamera.org/comment/27029/","msgid":"<20230503130604.GF32586@pendragon.ideasonboard.com>","date":"2023-05-03T13:06:04","subject":"Re: [libcamera-devel] [PATCH 2/2] v4l2: Move the v4l2-compat to\n\tlibcamera/","submitter":{"id":2,"url":"https://patchwork.libcamera.org/api/people/2/","name":"Laurent Pinchart","email":"laurent.pinchart@ideasonboard.com"},"content":"Hi Javier and Kieran,\n\nOn Wed, May 03, 2023 at 02:51:38PM +0200, Javier Martinez Canillas via libcamera-devel wrote:\n> On 5/1/23 17:55, Kieran Bingham wrote:\n> > Move the v4l2-compat.so shared library installation to the libcamera\n> > library directory. This is the same location that IPA modules live and\n> > will allow the 'generically sounding' v4l2-compat.so to be more clearly\n> > identified as a libcamera compatibility layer.\n> > \n> > Signed-off-by: Kieran Bingham \n> > ---\n> > We could also rename this to libcamera-v4l2-compat.so, and/or we could\n\nI think libcamera/v4l2-compat.so is enough from a namespacing point of\nview.\n\n> > also re-consider whether the libcamera-hal.so file should also live\n> > under the libcamera/ libdir by default.\n\nThat's a question specific to Android (and Chrome OS), I don't recall\nwhat the Android rules are.\n\n> > src/v4l2/meson.build | 3 ++-\n> > 1 file changed, 2 insertions(+), 1 deletion(-)\n> > \n> > diff --git a/src/v4l2/meson.build b/src/v4l2/meson.build\n> > index f132103cb503..114fddf7302a 100644\n> > --- a/src/v4l2/meson.build\n> > +++ b/src/v4l2/meson.build\n> > @@ -31,6 +31,7 @@ v4l2_compat = shared_library('v4l2-compat',\n> > v4l2_compat_sources,\n> > name_prefix : '',\n> > install : true,\n> > + install_dir : libcamera_libdir,\n> > dependencies : [libcamera_private, libdl],\n> > cpp_args : v4l2_compat_cpp_args)\n> > \n> > @@ -38,7 +39,7 @@ v4l2_compat = shared_library('v4l2-compat',\n> > # adaptation layer.\n> > \n> > cdata = configuration_data()\n> > -cdata.set('LIBCAMERA_V4L2_SO', get_option('prefix') / get_option('libdir') / 'v4l2-compat.so')\n> > +cdata.set('LIBCAMERA_V4L2_SO', get_option('prefix') / libcamera_libdir / 'v4l2-compat.so')\n> \n> As Laurent mentioned in another thread, I think that:\n> \n> +cdata.set('LIBCAMERA_V4L2_SO', get_option('libexecdir') / 'libcamera' / 'v4l2-compat.so')\n\nI think you need\n\n\tget_option('prefix') / get_option('libexecdir') / 'libcamera' / 'v4l2-compat.so'\n\n> would be better and more consistent with how other projects install\n> shared objects that are not meant to be public.\n\nAccording to\nhttps://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch04s07.html,\n\n\"/usr/libexec includes internal binaries that are not intended to be\nexecuted directly by users or shell scripts. Applications may use a\nsingle subdirectory under /usr/libexec.\"\n\nThis being said, valgrind installs LD_PRELOAD-able .so files in libexec,\nand there are some other .so from different packages there too. I thus\nthink it makes sense to store v4l2-compat.so in libexec.\n\nIf we go for libexec, the first patch in this series could also be\ndropped. We could keep it for additional safety, but until we store\nother files in that directory, it's a bit pointless.\n\n> That would also solve the issue I had when trying to enable the v4l2\n> compatibility layer and ship it in a separate libcamera-v4l2 sub-package.\n> \n> If you post a v2 with that change, feel free to add my:\n> \n> Reviewed-by: Javier Martinez Canillas ","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 404B3C0DA4\n\tfor ;\n\tWed, 3 May 2023 13:05:54 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id A672F627DE;\n\tWed, 3 May 2023 15:05:53 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 650CC61EAF\n\tfor ;\n\tWed, 3 May 2023 15:05:51 +0200 (CEST)","from pendragon.ideasonboard.com\n\t(133-32-181-51.west.xps.vectant.ne.jp [133.32.181.51])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id AB002755;\n\tWed, 3 May 2023 15:05:47 +0200 (CEST)"],"DKIM-Signature":["v=1; a=rsa-sha256; c=relaxed/simple; d=libcamera.org;\n\ts=mail; t=1683119153;\n\tbh=1J22BSQgX70JPXsv2l4rYrdzFLsc0OEYYYSiwyr6e5A=;\n\th=Date:To:References:In-Reply-To:Subject:List-Id:List-Unsubscribe:\n\tList-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc:\n\tFrom;\n\tb=W0ayToYpFtmI4HaVLsBLfPuczzImZVzKpaRjGIpJ5ik+h3YB6HT8ULBnEiYeBmxKE\n\tWmF6sx8c9wqIOR57rfONNMtuJ5pGRIriaERhKGGESBJmQI7b+56L5ejdsUmHDlYrnp\n\tIN89Ho5ERZ1yRneLQpzZiKRZ2618dBvkuHcLuP+sW5lkT0kEW2BJOxbU+uNiOuJXW5\n\toAPe+8VxQXr4+trPIF43yeOoX4Xx84Jd8mTxAEFbA6cY8DZxYrUiogYvJ3U/+m6bst\n\t8IUfa42tBz8aJQv0B2aZa57/2WR9JQjHF8uypRdJqqKLIiO7zJkzIiVUGCo4rhgqiL\n\tBJdRlVKZ6bT4A==","v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1683119148;\n\tbh=1J22BSQgX70JPXsv2l4rYrdzFLsc0OEYYYSiwyr6e5A=;\n\th=Date:From:To:Cc:Subject:References:In-Reply-To:From;\n\tb=gat8azxxIcPLLhl97pO5+zKlhA8b8+tfP9mHc4zq/Flksuhz+YCgODjQYq7FRXLGJ\n\tIvu6dgldBKf5pnAT+xVkU7j8aqqKQsEBNzUAfSTNJocMjcq/heCnNp0YV255GTG5cT\n\tod8Rlh9iOvkn4zeu2uriNdzovy1QaQHbgasDHskI="],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key; \n\tunprotected) header.d=ideasonboard.com\n\theader.i=@ideasonboard.com\n\theader.b=\"gat8azxx\"; dkim-atps=neutral","Date":"Wed, 3 May 2023 16:06:04 +0300","To":"Javier Martinez Canillas ","Message-ID":"<20230503130604.GF32586@pendragon.ideasonboard.com>","References":"<20230501155507.116039-1-kieran.bingham@ideasonboard.com>\n\t<20230501155507.116039-3-kieran.bingham@ideasonboard.com>\n\t","MIME-Version":"1.0","Content-Type":"text/plain; charset=utf-8","Content-Disposition":"inline","In-Reply-To":"","Subject":"Re: [libcamera-devel] [PATCH 2/2] v4l2: Move the v4l2-compat to\n\tlibcamera/","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","From":"Laurent Pinchart via libcamera-devel\n\t","Reply-To":"Laurent Pinchart ","Cc":"libcamera devel ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "}},{"id":27030,"web_url":"https://patchwork.libcamera.org/comment/27030/","msgid":"<87v8h9wnij.fsf@minerva.mail-host-address-is-not-set>","date":"2023-05-03T13:30:28","subject":"Re: [libcamera-devel] [PATCH 2/2] v4l2: Move the v4l2-compat to\n\tlibcamera/","submitter":{"id":95,"url":"https://patchwork.libcamera.org/api/people/95/","name":"Javier Martinez Canillas","email":"javierm@redhat.com"},"content":"Laurent Pinchart writes:\n\n> Hi Javier and Kieran,\n>\n> On Wed, May 03, 2023 at 02:51:38PM +0200, Javier Martinez Canillas via libcamera-devel wrote:\n>> On 5/1/23 17:55, Kieran Bingham wrote:\n>> > Move the v4l2-compat.so shared library installation to the libcamera\n>> > library directory. This is the same location that IPA modules live and\n>> > will allow the 'generically sounding' v4l2-compat.so to be more clearly\n>> > identified as a libcamera compatibility layer.\n>> > \n>> > Signed-off-by: Kieran Bingham \n>> > ---\n>> > We could also rename this to libcamera-v4l2-compat.so, and/or we could\n>\n> I think libcamera/v4l2-compat.so is enough from a namespacing point of\n> view.\n>\n\nAgreed.\n\n>> > also re-consider whether the libcamera-hal.so file should also live\n>> > under the libcamera/ libdir by default.\n>\n> That's a question specific to Android (and Chrome OS), I don't recall\n> what the Android rules are.\n>\n>> > src/v4l2/meson.build | 3 ++-\n>> > 1 file changed, 2 insertions(+), 1 deletion(-)\n>> > \n>> > diff --git a/src/v4l2/meson.build b/src/v4l2/meson.build\n>> > index f132103cb503..114fddf7302a 100644\n>> > --- a/src/v4l2/meson.build\n>> > +++ b/src/v4l2/meson.build\n>> > @@ -31,6 +31,7 @@ v4l2_compat = shared_library('v4l2-compat',\n>> > v4l2_compat_sources,\n>> > name_prefix : '',\n>> > install : true,\n>> > + install_dir : libcamera_libdir,\n>> > dependencies : [libcamera_private, libdl],\n>> > cpp_args : v4l2_compat_cpp_args)\n>> > \n>> > @@ -38,7 +39,7 @@ v4l2_compat = shared_library('v4l2-compat',\n>> > # adaptation layer.\n>> > \n>> > cdata = configuration_data()\n>> > -cdata.set('LIBCAMERA_V4L2_SO', get_option('prefix') / get_option('libdir') / 'v4l2-compat.so')\n>> > +cdata.set('LIBCAMERA_V4L2_SO', get_option('prefix') / libcamera_libdir / 'v4l2-compat.so')\n>> \n>> As Laurent mentioned in another thread, I think that:\n>> \n>> +cdata.set('LIBCAMERA_V4L2_SO', get_option('libexecdir') / 'libcamera' / 'v4l2-compat.so')\n>\n> I think you need\n>\n> \tget_option('prefix') / get_option('libexecdir') / 'libcamera' / 'v4l2-compat.so'\n>\n\nRight, sorry I missed the 'prefix' when typed the above.\n\n>> would be better and more consistent with how other projects install\n>> shared objects that are not meant to be public.\n>\n> According to\n> https://refspecs.linuxfoundation.org/FHS_3.0/fhs/ch04s07.html,\n>\n> \"/usr/libexec includes internal binaries that are not intended to be\n> executed directly by users or shell scripts. Applications may use a\n> single subdirectory under /usr/libexec.\"\n>\n> This being said, valgrind installs LD_PRELOAD-able .so files in libexec,\n> and there are some other .so from different packages there too. I thus\n> think it makes sense to store v4l2-compat.so in libexec.\n>\n> If we go for libexec, the first patch in this series could also be\n> dropped. We could keep it for additional safety, but until we store\n> other files in that directory, it's a bit pointless.\n>\n\nAgreed.","headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 7CE6EBD16B\n\tfor ;\n\tWed, 3 May 2023 13:30:36 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id D9216633B4;\n\tWed, 3 May 2023 15:30:35 +0200 (CEST)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.133.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id F15D361EAF\n\tfor ;\n\tWed, 3 May 2023 15:30:34 +0200 (CEST)","from mail-wm1-f69.google.com (mail-wm1-f69.google.com\n\t[209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id\n\tus-mta-64-3GN5IVHqNcyV0cOEfsmTsQ-1; 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