Description:

Package grpc in versions 1.38.0-1 and above has some sonames that do not follow conventions, having two period-separated integers in place of one, for example:

> ll /usr/lib/libgrpc++_unsecure.so*
lrwxrwxrwx 1 root root 26 Jun 2 22:55 /usr/lib/libgrpc++_unsecure.so -> libgrpc++_unsecure.so.1.38
lrwxrwxrwx 1 root root 28 Jun 2 22:55 /usr/lib/libgrpc++_unsecure.so.1.38 -> libgrpc++_unsecure.so.1.38.0
-rwxr-xr-x 1 root root 482K Jun 2 22:55 /usr/lib/libgrpc++_unsecure.so.1.38.0
> objdump -p /usr/lib/libgrpc++_unsecure.so | grep SONAME
SONAME libgrpc++_unsecure.so.1.38


Some others soname of the package, on the other hands, have the usual format:

> ll /usr/lib/libgrpc.so*
lrwxrwxrwx 1 root root 13 Jun 2 22:55 /usr/lib/libgrpc.so -> libgrpc.so.16
lrwxrwxrwx 1 root root 17 Jun 2 22:55 /usr/lib/libgrpc.so.16 -> libgrpc.so.16.0.0
-rwxr-xr-x 1 root root 3.8M Jun 2 22:55 /usr/lib/libgrpc.so.16.0.0
> objdump -p /usr/lib/libgrpc.so | grep SONAME
SONAME libgrpc.so.16

Upgrading the package has thus broken the sysdig and csysdig binaries of the sysdig package:

> ldd /bin/sysdig
linux-vdso.so.1 (0x00007fff04b96000)
libelf.so.1 => /usr/lib/libelf.so.1 (0x00007f45f4540000)
libz.so.1 => /usr/lib/libz.so.1 (0x00007f45f4526000)
libcurl.so.4 => /usr/lib/libcurl.so.4 (0x00007f45f4489000)
libjsoncpp.so.24 => /usr/lib/libjsoncpp.so.24 (0x00007f45f4451000)
libtbb.so.2 => /usr/lib/libtbb.so.2 (0x00007f45f440b000)
libcares.so.2 => /usr/lib/libcares.so.2 (0x00007f45f43f2000)
libgrpc++_unsecure.so.1 => not found
...

This has been caused by a change upstream: https://github.com/grpc/grpc/commit/df73c74f99183cd7674149aadc693b12d121c9d9
As a side note, one of the issues this commit was resolving contains this comment suggesting that grpc++ abi compatibility is unsupported and recommending against packaging it: https://github.com/grpc/grpc/issues/23205#issuecomment-790806982

I hope reporting this as a grpc bug (and not sysdig one) was the correct choice, sorry if I got it wrong.

Steps to reproduce:
- Up to date system, install sysdig which pulls grpc
- $ sysdig
sysdig: error while loading shared libraries: libgrpc++_unsecure.so.1: cannot open shared object file: No such file or directory