kumquat-buildroot/package/eudev/Config.in

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config BR2_PACKAGE_EUDEV
bool "eudev"
depends on BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV
depends on BR2_USE_MMU # uses fork()
depends on BR2_USE_WCHAR # needs C99 compiler
depends on !BR2_STATIC_LIBS # kmod
select BR2_PACKAGE_HAS_UDEV
select BR2_PACKAGE_UDEV_GENTOO_SCRIPTS if BR2_INIT_OPENRC
select BR2_PACKAGE_UTIL_LINUX
package/util-linux: build programs and libraries in separate packages The different tools and libraries in util-linux have a lot of optional dependencies. When we want to support those optional dependencies, we can easily generate dependency cycles. For instance, findmount and lsblk need udev to work correctly, but eudev and systemd both depend libblkid, which comes from util-linux. Normal distros (e.g. Debian) solve this by first building a minimal package that has no dependencies at all, then build the packages that depend on util-linux, and finally rebuild util-linux with all bells and whistles. Solve it in Buildroot by means of the following changes: - Split util-linux into two packages: - util-linux-libs, providing lib{blkid,fdisk,mount,smartcols,uuid}. - util-linux, providing both the aforementioned libs and the programs. - Add a blind selection for util-linux-libs, i.e. it is indirectly selected according to the util-linux options. - Make host and target util-linux have a build dependencies on the -libs packages. - Make eudev and systemd have build dependencies on util-linux-libs. This can be extended to other packages in the future but is not needed right now because the configuration options are backward-compatible. - Make util-linux have an optional build dependency on the package that provides libudev (either eudev or systemd), if it is selected. Installing util-linux overrides files installed by util-linux-libs but this is not a problem: it's allowed for a package to overwrite files from another package, as long as there is a dependency between the two. util-linux-libs has a Config.in symbol for the package as a whole, but not for the individual libraries: it simply reuses the symbols of the full package. The build dependency of util-linux on util-linux-libs ensures that util-linux overwrites the files installed by util-linux-libs and not vice versa. In practice this dependency shouldn't be needed: the only reason for util-linux-libs to be built is to break a circular dependency. In that case, there is already a transitive dependency of util-linux on util-linux-libs, so adding it explicitly is redundant. Still, better safe than sorry. host-util-linux-libs is not needed at the moment. It can be added if we have a dependency cycle problem later. With this approach we don't need to patch configuration files neither change packages other than eudev and systemd. Other packages that require util-linux libraries and whose libraries may be used by util-linux programs can be updated later. We also don't need to change any existing defconfig, since all configuration options are kept in the util-linux package. Fixes: https://bugs.busybox.net/show_bug.cgi?id=11811 Signed-off-by: Carlos Santos <unixmania@gmail.com> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
2019-09-29 16:01:35 +02:00
select BR2_PACKAGE_UTIL_LINUX_LIBS
select BR2_PACKAGE_UTIL_LINUX_LIBBLKID
select BR2_PACKAGE_KMOD
help
eudev is a fork of systemd-udev with the goal of obtaining
better compatibility with existing software such as OpenRC and
Upstart, older kernels, various toolchains and anything else
required by users and various distributions.
https://wiki.gentoo.org/wiki/Project:Eudev
if BR2_PACKAGE_EUDEV
config BR2_PACKAGE_PROVIDES_UDEV
default "eudev"
config BR2_PACKAGE_EUDEV_RULES_GEN
bool "enable rules generator"
help
Enable persistent rules generator
config BR2_PACKAGE_EUDEV_ENABLE_HWDB
bool "enable hwdb installation"
default y
select BR2_PACKAGE_HOST_EUDEV # for udevadm, during target-finalize
help
Enables hardware database installation to /etc/udev/hwdb.bin
endif
comment "eudev needs eudev /dev management"
depends on BR2_USE_MMU
depends on !BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV
comment "eudev needs a toolchain w/ wchar, dynamic library"
depends on BR2_USE_MMU
depends on !BR2_USE_WCHAR || BR2_STATIC_LIBS