package: Only snap libraries if they would be processed by ldconfig OS-12840
PACKAGE_SNAP_LIB_SYMLINKS renames libraries based on their SONAME so
that they can be found directly rather than going via symlinks that
would be created by ldconfig. For example, without
PACKAGE_SNAP_LIB_SYMLINKS in ${libdir} we have:
libharfbuzz.so.0 -> libharfbuzz.so.0.20600.4
libharfbuzz.so.0.20600.4
but with PACKAGE_SNAP_LIB_SYMLINKS="1" we have just:
libharfbuzz.so.0
Unfortunately, this renaming is done based on the SONAME which breaks
packages like mesa which install a single library with multiple hard
links:
-rwxr-xr-x root/root
13593488 2021-12-07 12:26 ./usr/lib/dri/i915_dri.so
-rwxr-xr-x root/root
13137328 2021-12-07 12:26 ./usr/lib/dri/i965_dri.so
hrwxr-xr-x root/root 0 2021-12-07 12:26 ./usr/lib/dri/iris_dri.so link to ./usr/lib/dri/i915_dri.so
hrwxr-xr-x root/root 0 2021-12-07 12:26 ./usr/lib/dri/kms_swrast_dri.so link to ./usr/lib/dri/i915_dri.so
hrwxr-xr-x root/root 0 2021-12-07 12:26 ./usr/lib/dri/nouveau_vieux_dri.so link to ./usr/lib/dri/i965_dri.so
hrwxr-xr-x root/root 0 2021-12-07 12:26 ./usr/lib/dri/r200_dri.so link to ./usr/lib/dri/i965_dri.so
hrwxr-xr-x root/root 0 2021-12-07 12:26 ./usr/lib/dri/radeon_dri.so link to ./usr/lib/dri/i965_dri.so
hrwxr-xr-x root/root 0 2021-12-07 12:26 ./usr/lib/dri/swrast_dri.so link to ./usr/lib/dri/i915_dri.so
The SONAME for i915_dri.so (and therefore all the other names that link
to the same file) is libgallium_dri.so. This means that
PACKAGE_SNAP_LIB_SYMLINKS causes do_package to successfully rename the
first name found to libgallium_dri.so. A similar thing happens to
i965_dri.so with its SONAME of libmesa_dri_drivers.so. The order is not
deterministic, so this means that although every build will be missing
one name, it's not always the same one.
-rwxr-xr-x root/root
13593488 2021-11-30 15:17 ./usr/lib/dri/i915_dri.so
hrwxr-xr-x root/root 0 2021-11-30 15:17 ./usr/lib/dri/kms_swrast_dri.so link to ./usr/lib/dri/i915_dri.so
hrwxr-xr-x root/root 0 2021-11-30 15:17 ./usr/lib/dri/libgallium_dri.so link to ./usr/lib/dri/i915_dri.so
-rwxr-xr-x root/root
13137328 2021-11-30 15:17 ./usr/lib/dri/libmesa_dri_drivers.so
hrwxr-xr-x root/root 0 2021-11-30 15:17 ./usr/lib/dri/nouveau_vieux_dri.so link to ./usr/lib/dri/libmesa_dri_drivers.so
hrwxr-xr-x root/root 0 2021-11-30 15:17 ./usr/lib/dri/r200_dri.so link to ./usr/lib/dri/libmesa_dri_drivers.so
hrwxr-xr-x root/root 0 2021-11-30 15:17 ./usr/lib/dri/radeon_dri.so link to ./usr/lib/dri/libmesa_dri_drivers.so
hrwxr-xr-x root/root 0 2021-11-30 15:17 ./usr/lib/dri/swrast_dri.so link to ./usr/lib/dri/i915_dri.so
This renaming means that the library cannot be found at runtime.
The simplest way to avoid this renaming is to only snap libraries that
would be processed by ldconfig.
Signed-off-by: Mike Crowe <mac@mcrowe.com>
Signed-off-by: Phil Blundell <pb@pbcl.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
