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ba8965f72d
libxshmfence has multiple paths available for the shared memory
directory, as some distros [0] opt to mount their tmpfs in a
non-standard location such as /run/shm rather than /dev/shm.
The default value of 'auto' will set this path to whatever the host is
using, leaking host configuration into the target. See [1].
With X configurations that depend on shared memory files for futexes,
(muvm [2] is a notable example), this results in applications silently
breaking during presentation with a blank window, as the configured
path doesn't have the required tmpfs mount.
Set this path explicitly to avoid situations where the host context
leaks into the package build, causing feature breakage.
[0] https://wiki.ubuntu.com/OneiricOcelot/ReleaseNotes?action=show&redirect=OneiricOcelot%2FTechnicalOverview#Upgrades
[1] https://gitlab.freedesktop.org/xorg/lib/libxshmfence/-/blob/libxshmfence-1.3.3/configure.ac#L144
[2] https://github.com/AsahiLinux/muvm
Signed-off-by: Joseph Kogut <joseph.kogut@gmail.com>
[Julien:
- add link to shared memory dir detection code in commit log
- replace "+=" by "=" in _CONF_OPTS
]
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit cb79eee7fe)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches