[PATCH v2] Revert "linux-custom: support to add linux-libc-dev package with kernel name"

[Jan Kiszka]

From: Jan Kiszka <jan.k...@siemens.com>

This reverts commit 6cf35fc33d11f7d3feb0472a40e79dbd3ee3d759.

Besides having multiple implementations flaws, the general approach
turned out to be incompatible with Debian's dependency management: We
cannot replace a package A with a package B which only provides A. The
resolver will continue to prefer package A when it is requested,
explicitly or implicitly.

If a build enables multiple kernels, it is recommended to ensure at
recipe-level that only one kernel build enables KERNEL_LIBC_DEV_DEPLOY.

Signed-off-by: Jan Kiszka <jan.k...@siemens.com>
---

Changes in v2:
- rebased over next

RECIPE-API-CHANGELOG.md | 7 +++++++
doc/custom_kernel.md | 4 ++--
meta/recipes-kernel/linux/files/debian/control.tmpl | 10 +++-------
.../recipes-kernel/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, 14 insertions(+), 13 deletions(-)

diff --git a/RECIPE-API-CHANGELOG.md b/RECIPE-API-CHANGELOG.md
index 2930ade9..21da672f 100644
--- a/RECIPE-API-CHANGELOG.md
+++ b/RECIPE-API-CHANGELOG.md
@@ -761,3 +761,10 @@ the following variables in your image recipe. For example, to use German, add:
LOCALE_GEN = "de_DE.UTF-8 UTF-8\n"
LOCALE_DEFAULT = "de_DE.UTF-8"
```
+
+### Revert enabling of linux-libc-dev package with KERNEL_NAME
+
+The change "Enable linux-libc-dev package with KERNEL_NAME" turned out to be
+incompatible with how Debian selects dependencies. It is therefore necessary
+to only enable `KERNEL_LIBC_DEV_DEPLOY` for a single kernel in case multiples
+are configured via `KERNEL_NAMES`.
diff --git a/doc/custom_kernel.md b/doc/custom_kernel.md
index 2dca577c..ce5f1bf7 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-${KERNEL_NAME}` package to support user-land builds
+ 10. Produce a `linux-libc-dev` package to support user-land builds

- 11. Only build/ship the `linux-libc-dev-${KERNEL_NAME}` package if instructed to
+ 11. Only build/ship the `linux-libc-dev` 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 112ff9bf..c27fe0c7 100644
--- a/meta/recipes-kernel/linux/files/debian/control.tmpl
+++ b/meta/recipes-kernel/linux/files/debian/control.tmpl
@@ -22,23 +22,19 @@ Description: ${KERNEL_NAME_PROVIDED} Linux kernel headers for @KR@
.
This is useful for people who need to build external modules

-Package: linux-libc-dev-${KERNEL_NAME_PROVIDED}
+Package: linux-libc-dev
Build-Profiles: <!nolibcdev kernel>
Section: devel
-Conflicts: linux-libc-dev
-Provides: linux-libc-dev
-Replaces: linux-libc-dev
+Provides: linux-kernel-headers
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-${DISTRO_ARCH}-cross-${KERNEL_NAME_PROVIDED}
+Package: linux-libc-dev-${DISTRO_ARCH}-cross
Build-Profiles: <!nolibcdev cross !kbuild>
Section: devel
-Conflicts: linux-kernel-headers-${DISTRO_ARCH}-cross
Provides: linux-kernel-headers-${DISTRO_ARCH}-cross
-Replaces: linux-kernel-headers-${DISTRO_ARCH}-cross
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 b004214f..f9cc2f02 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_NAME_PROVIDED}
+KERNEL_PKG_LIBC_HEADERS=linux-libc-dev
KERNEL_PKG_LIBC_HEADERS_CROSS=linux-libc-dev-${DISTRO_ARCH}-cross
KERNEL_PKG_KERN_KBUILD=linux-kbuild-${KERNEL_NAME_PROVIDED}
KERNEL_PKG_KERN_KBUILD_CROSS=${KERNEL_PKG_KERN_KBUILD}-${DISTRO_ARCH}-cross
diff --git a/meta/recipes-kernel/linux/files/debian/isar/install.tmpl b/meta/recipes-kernel/linux/files/debian/isar/install.tmpl
index d7e711ef..fe0bd810 100644
--- a/meta/recipes-kernel/linux/files/debian/isar/install.tmpl
+++ b/meta/recipes-kernel/linux/files/debian/isar/install.tmpl
@@ -240,7 +240,7 @@ install_headers() {
if dpkg --compare-versions "${krel}" "lt" "5.4.24"; then
headers_check
fi
- [ -z ${kern_pkgs["linux-libc-dev-${KERNEL_NAME_PROVIDED}"]} ] || libc_headers
+ [ -z ${kern_pkgs["linux-libc-dev"]} ] || libc_headers
kernel_headers
}

diff --git a/meta/recipes-kernel/linux/linux-custom.inc b/meta/recipes-kernel/linux/linux-custom.inc
index ca90c4e9..9da10c31 100644
--- a/meta/recipes-kernel/linux/linux-custom.inc
+++ b/meta/recipes-kernel/linux/linux-custom.inc
@@ -150,9 +150,7 @@ RECIPE_PROVIDES = " \
linux-image-${KERNEL_NAME_PROVIDED} \
linux-headers-${KERNEL_NAME_PROVIDED} \
linux-libc-dev \
- linux-libc-dev-${KERNEL_NAME_PROVIDED} \
linux-libc-dev-${DISTRO_ARCH}-cross \
- linux-libc-dev-${DISTRO_ARCH}-cross-${KERNEL_NAME_PROVIDED} \
linux-image-${KERNEL_NAME_PROVIDED}-dbg \
linux-kbuild-${KERNEL_NAME_PROVIDED} \
${BPN}-pseudo-native \
--
2.51.0