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Wed, 10 Sep 2025 17:22:22 +0000 Message-ID: Date: Wed, 10 Sep 2025 19:22:21 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] linux-custom: support to add linux-libc-dev package with kernel name To: Arulpandiyan Vadivel , isar-users@googlegroups.com Cc: cedric.hombourger@siemens.com, srikanth.krishnakar@siemens.com References: <20250117180207.90250-1-arulpandiyan.vadivel@siemens.com> <20250121094736.99179-1-arulpandiyan.vadivel@siemens.com> From: "'Jan Kiszka' via isar-users" Content-Language: en-US Autocrypt: addr=jan.kiszka@siemens.com; keydata= xsFNBGZY+hkBEACkdtFD81AUVtTVX+UEiUFs7ZQPQsdFpzVmr6R3D059f+lzr4Mlg6KKAcNZ uNUqthIkgLGWzKugodvkcCK8Wbyw+1vxcl4Lw56WezLsOTfu7oi7Z0vp1XkrLcM0tofTbClW xMA964mgUlBT2m/J/ybZd945D0wU57k/smGzDAxkpJgHBrYE/iJWcu46jkGZaLjK4xcMoBWB I6hW9Njxx3Ek0fpLO3876bszc8KjcHOulKreK+ezyJ01Hvbx85s68XWN6N2ulLGtk7E/sXlb 79hylHy5QuU9mZdsRjjRGJb0H9Buzfuz0XrcwOTMJq7e7fbN0QakjivAXsmXim+s5dlKlZjr L3ILWte4ah7cGgqc06nFb5jOhnGnZwnKJlpuod3pc/BFaFGtVHvyoRgxJ9tmDZnjzMfu8YrA +MVv6muwbHnEAeh/f8e9O+oeouqTBzgcaWTq81IyS56/UD6U5GHet9Pz1MB15nnzVcyZXIoC roIhgCUkcl+5m2Z9G56bkiUcFq0IcACzjcRPWvwA09ZbRHXAK/ao/+vPAIMnU6OTx3ejsbHn oh6VpHD3tucIt+xA4/l3LlkZMt5FZjFdkZUuAVU6kBAwElNBCYcrrLYZBRkSGPGDGYZmXAW/ VkNUVTJkRg6MGIeqZmpeoaV2xaIGHBSTDX8+b0c0hT/Bgzjv8QARAQABzSNKYW4gS2lzemth IDxqYW4ua2lzemthQHNpZW1lbnMuY29tPsLBlAQTAQoAPhYhBABMZH11cs99cr20+2mdhQqf QXvYBQJmWPvXAhsDBQkFo5qABQsJCAcCBhUKCQgLAgQWAgMBAh4BAheAAAoJEGmdhQqfQXvY zPAP/jGiVJ2VgPcRWt2P8FbByfrJJAPCsos+SZpncRi7tl9yTEpS+t57h7myEKPdB3L+kxzg K3dt1UhYp4FeIHA3jpJYaFvD7kNZJZ1cU55QXrJI3xu/xfB6VhCs+VAUlt7XhOsOmTQqCpH7 pRcZ5juxZCOxXG2fTQTQo0gfF5+PQwQYUp0NdTbVox5PTx5RK3KfPqmAJsBKdwEaIkuY9FbM 9lGg8XBNzD2R/13cCd4hRrZDtyegrtocpBAruVqOZhsMb/h7Wd0TGoJ/zJr3w3WnDM08c+RA 5LHMbiA29MXq1KxlnsYDfWB8ts3HIJ3ROBvagA20mbOm26ddeFjLdGcBTrzbHbzCReEtN++s gZneKsYiueFDTxXjUOJgp8JDdVPM+++axSMo2js8TwVefTfCYt0oWMEqlQqSqgQwIuzpRO6I ik7HAFq8fssy2cY8Imofbj77uKz0BNZC/1nGG1OI9cU2jHrqsn1i95KaS6fPu4EN6XP/Gi/O 0DxND+HEyzVqhUJkvXUhTsOzgzWAvW9BlkKRiVizKM6PLsVm/XmeapGs4ir/U8OzKI+SM3R8 VMW8eovWgXNUQ9F2vS1dHO8eRn2UqDKBZSo+qCRWLRtsqNzmU4N0zuGqZSaDCvkMwF6kIRkD ZkDjjYQtoftPGchLBTUzeUa2gfOr1T4xSQUHhPL8zsFNBGZY+hkBEADb5quW4M0eaWPIjqY6 aC/vHCmpELmS/HMa5zlA0dWlxCPEjkchN8W4PB+NMOXFEJuKLLFs6+s5/KlNok/kGKg4fITf Vcd+BQd/YRks3qFifckU+kxoXpTc2bksTtLuiPkcyFmjBph/BGms35mvOA0OaEO6fQbauiHa QnYrgUQM+YD4uFoQOLnWTPmBjccoPuiJDafzLxwj4r+JH4fA/4zzDa5OFbfVq3ieYGqiBrtj tBFv5epVvGK1zoQ+Rc+h5+dCWPwC2i3cXTUVf0woepF8mUXFcNhY+Eh8vvh1lxfD35z2CJeY txMcA44Lp06kArpWDjGJddd+OTmUkFWeYtAdaCpj/GItuJcQZkaaTeiHqPPrbvXM361rtvaw XFUzUlvoW1Sb7/SeE/BtWoxkeZOgsqouXPTjlFLapvLu5g9MPNimjkYqukASq/+e8MMKP+EE v3BAFVFGvNE3UlNRh+ppBqBUZiqkzg4q2hfeTjnivgChzXlvfTx9M6BJmuDnYAho4BA6vRh4 Dr7LYTLIwGjguIuuQcP2ENN+l32nidy154zCEp5/Rv4K8SYdVegrQ7rWiULgDz9VQWo2zAjo TgFKg3AE3ujDy4V2VndtkMRYpwwuilCDQ+Bpb5ixfbFyZ4oVGs6F3jhtWN5Uu43FhHSCqUv8 FCzl44AyGulVYU7hTQARAQABwsF8BBgBCgAmFiEEAExkfXVyz31yvbT7aZ2FCp9Be9gFAmZY +hkCGwwFCQWjmoAACgkQaZ2FCp9Be9hN3g/8CdNqlOfBZGCFNZ8Kf4tpRpeN3TGmekGRpohU bBMvHYiWW8SvmCgEuBokS+Lx3pyPJQCYZDXLCq47gsLdnhVcQ2ZKNCrr9yhrj6kHxe1Sqv1S MhxD8dBqW6CFe/mbiK9wEMDIqys7L0Xy/lgCFxZswlBW3eU2Zacdo0fDzLiJm9I0C9iPZzkJ gITjoqsiIi/5c3eCY2s2OENL9VPXiH1GPQfHZ23ouiMf+ojVZ7kycLjz+nFr5A14w/B7uHjz uL6tnA+AtGCredDne66LSK3HD0vC7569sZ/j8kGKjlUtC+zm0j03iPI6gi8YeCn9b4F8sLpB lBdlqo9BB+uqoM6F8zMfIfDsqjB0r/q7WeJaI8NKfFwNOGPuo93N+WUyBi2yYCXMOgBUifm0 T6Hbf3SHQpbA56wcKPWJqAC2iFaxNDowcJij9LtEqOlToCMtDBekDwchRvqrWN1mDXLg+av8 qH4kDzsqKX8zzTzfAWFxrkXA/kFpR3JsMzNmvextkN2kOLCCHkym0zz5Y3vxaYtbXG2wTrqJ 8WpkWIE8STUhQa9AkezgucXN7r6uSrzW8IQXxBInZwFIyBgM0f/fzyNqzThFT15QMrYUqhhW ZffO4PeNJOUYfXdH13A6rbU0y6xE7Okuoa01EqNi9yqyLA8gPgg/DhOpGtK8KokCsdYsTbk= In-Reply-To: Content-Type: text/plain; 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dkim=pass header.i=@siemens.com header.s=selector2 header.b=KesGMNFQ; arc=pass (i=1 spf=pass spfdomain=siemens.com dkim=pass dkdomain=siemens.com dmarc=pass fromdomain=siemens.com); spf=pass (google.com: domain of jan.kiszka@siemens.com designates 2a01:111:f403:c200::3 as permitted sender) smtp.mailfrom=jan.kiszka@siemens.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=siemens.com X-Original-From: Jan Kiszka Reply-To: Jan Kiszka Precedence: list Mailing-list: list isar-users@googlegroups.com; contact isar-users+owners@googlegroups.com List-ID: X-Spam-Checked-In-Group: isar-users@googlegroups.com X-Google-Group-Id: 914930254986 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Status: No, score=-4.9 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL, RCVD_IN_RP_CERTIFIED,RCVD_IN_RP_RNBL,RCVD_IN_RP_SAFE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on shymkent.ilbers.de X-TUID: PDdiUnmqLBkg On 10.09.25 15:55, 'Jan Kiszka' via isar-users wrote: > On 21.01.25 10:47, 'Arulpandiyan Vadivel' via isar-users wrote: >> Debian and Ubuntu use unified kernel headers and a single linux-libc-dev >> package is shipped. In contrast, Isar may build multiple kernel variants >> with different versions and/or patches and their packages but linux-libc-dev >> are suffixed with -${KERNEL_NAME_PROVIDED}: this allows >> each variant to exist in isar-apt (reprepro may not have more than one >> version of a given package for a given suite). >> Apply the same suffix to linux-libc-dev / linux-libc-dev-${DISTRO_ARCH}-cross >> and a Provides: clause. >> >> Signed-off-by: Arulpandiyan Vadivel >> >> --- >> Changes since v4 >> - Updated KERNEL_PKG_LIBC_HEADERS path with KERNEL_NAME_PROVIDED >> >> Changes since v3 >> - Updated commit message to include cross packages >> - updated doc/custom_kernel.md documentation >> >> Changes since v2 >> - Updated commit message as suggested >> - Added KERNEL_NAME_PROVIDED for cross packages of linux-libc-dev as well >> >> --- >> --- >> RECIPE-API-CHANGELOG.md | 12 ++++++++++++ >> doc/custom_kernel.md | 4 ++-- >> meta/recipes-kernel/linux/files/debian/control.tmpl | 10 +++++++--- >> .../linux/files/debian/isar/common.tmpl | 2 +- >> .../linux/files/debian/isar/install.tmpl | 2 +- >> meta/recipes-kernel/linux/linux-custom.inc | 2 ++ >> 6 files changed, 25 insertions(+), 7 deletions(-) >> >> diff --git a/RECIPE-API-CHANGELOG.md b/RECIPE-API-CHANGELOG.md >> index f310553a..64c0f34a 100644 >> --- a/RECIPE-API-CHANGELOG.md >> +++ b/RECIPE-API-CHANGELOG.md >> @@ -702,3 +702,15 @@ enable cross-compilation. Otherwize ISAR_CROSS_COMPILE = "0" now should be set >> in local.conf to disable cross-compilation for all the recipes. >> Sample local.conf from meta-isar used by isar-init-build-env is also changed >> to enable cross-compilation by default. >> + >> +### Enable linux-libc-dev package with KERNEL_NAME >> + >> +By default linux-libc-dev and linux-libc-dev-${DISTRO_ARCH}-cross package >> +was generated for architecture it builds for. >> + >> +This change helps to generate the `linux-libc-dev-${KERNEL_NAME}` and >> +`linux-libc-dev-${DISTRO_ARCH}-cross-${KERNEL_NAME}`. >> +For example, If `KERNEL_NAME` is configured as `foo` for arm64, now >> +`linux-libc-dev-foo` and `linux-libc-dev-arm64-cross-foo` package will be >> +generated. This will help to have multiple versions of linux-libc-dev packages >> +available for respective bsps in apt feeds. >> diff --git a/doc/custom_kernel.md b/doc/custom_kernel.md >> index ce5f1bf7..2dca577c 100644 >> --- a/doc/custom_kernel.md >> +++ b/doc/custom_kernel.md >> @@ -51,9 +51,9 @@ The linux-custom recipe provides support for: >> >> Only the `host` specific package is built automatically at cross builds. >> >> - 10. Produce a `linux-libc-dev` package to support user-land builds >> + 10. Produce a `linux-libc-dev-${KERNEL_NAME}` package to support user-land builds >> >> - 11. Only build/ship the `linux-libc-dev` package if instructed to >> + 11. Only build/ship the `linux-libc-dev-${KERNEL_NAME}` package if instructed to >> (`KERNEL_LIBC_DEV_DEPLOY` equals to `"1"`) >> >> 12. Support both native and cross compiles (`ISAR_CROSS_COMPILE`) >> diff --git a/meta/recipes-kernel/linux/files/debian/control.tmpl b/meta/recipes-kernel/linux/files/debian/control.tmpl >> index ec0da1ab..a79b86c4 100644 >> --- a/meta/recipes-kernel/linux/files/debian/control.tmpl >> +++ b/meta/recipes-kernel/linux/files/debian/control.tmpl >> @@ -22,19 +22,23 @@ Description: ${KERNEL_NAME_PROVIDED} Linux kernel headers for @KR@ >> . >> This is useful for people who need to build external modules >> >> -Package: linux-libc-dev >> +Package: linux-libc-dev-${KERNEL_NAME_PROVIDED} >> Build-Profiles: >> Section: devel >> -Provides: linux-kernel-headers >> +Conflicts: linux-libc-dev >> +Provides: linux-libc-dev >> +Replaces: linux-libc-dev >> Architecture: ${KERNEL_LIBC_DEV_ARCH} >> Description: Linux support headers for userspace development >> This package provides userspaces headers from the Linux kernel. These headers >> are used by the installed headers for GNU glibc and other system libraries. >> >> -Package: linux-libc-dev-${DISTRO_ARCH}-cross >> +Package: linux-libc-dev-${DISTRO_ARCH}-cross-${KERNEL_NAME_PROVIDED} >> Build-Profiles: >> Section: devel >> +Conflicts: linux-kernel-headers-${DISTRO_ARCH}-cross >> Provides: linux-kernel-headers-${DISTRO_ARCH}-cross >> +Replaces: linux-kernel-headers-${DISTRO_ARCH}-cross This was also wrong. >> Architecture: all >> Description: Linux Kernel Headers for development (for cross-compiling) >> This package provides headers from the Linux kernel. These headers >> diff --git a/meta/recipes-kernel/linux/files/debian/isar/common.tmpl b/meta/recipes-kernel/linux/files/debian/isar/common.tmpl >> index f9cc2f02..b004214f 100644 >> --- a/meta/recipes-kernel/linux/files/debian/isar/common.tmpl >> +++ b/meta/recipes-kernel/linux/files/debian/isar/common.tmpl >> @@ -8,7 +8,7 @@ set -e >> ARCH=${KERNEL_ARCH} >> KERNEL_PKG_IMAGE=linux-image-${KERNEL_NAME_PROVIDED} >> KERNEL_PKG_KERN_HEADERS=linux-headers-${KERNEL_NAME_PROVIDED} >> -KERNEL_PKG_LIBC_HEADERS=linux-libc-dev >> +KERNEL_PKG_LIBC_HEADERS=linux-libc-dev-${KERNEL_NAME_PROVIDED} >> KERNEL_PKG_LIBC_HEADERS_CROSS=linux-libc-dev-${DISTRO_ARCH}-cross > > This broke the cross libc-dev package. Fix is being tested. > > Seems we are lacking tests for this scenario: found via xenomai-images > only, and there we were lacking CI for the affected path as well :(. > There is another issue with this patch which was likely hard to predict: It broke automatic downgrades, possibly also updates, of libc-dev in the sbuild-chroots. As xenomai-images is currently broken in other regards as well, I cannot easily point to a demo case, but I reproduced that locally: After reverting this change, I can build libevl, which really needs the custom kernel's libc-dev because of extra headers, without any extra dependency. [...] Reading package lists... Building dependency tree... Reading state information... Calculating upgrade... The following packages will be upgraded: linux-libc-dev 1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. [...] With this change, I would now have to add the explicit Build-Depends on linux-libc-dev-${KERNEL_NAME} or the corresponding cross package. That is a very ugly recipe API change that was also not documented. So, I'm not very happy with having this pattern here by default and would prefer only using it if there are actually multiple kernels that also deploy their libc-dev packages. Unless someone has a good idea quickly, we should revert this first and retry later. Jan -- Siemens AG, Foundational Technologies Linux Expert Center -- You received this message because you are subscribed to the Google Groups "isar-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to isar-users+unsubscribe@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/isar-users/a1e2e1c9-358a-481b-86e4-faf1808338bf%40siemens.com.