What were you trying to do that didn't work?

Due to bug of cargo https://github.com/rust-lang/cargo/issues/5045, by default, the cargo will not set SONAME for C library build from rust code.

Previously, we are using `.cargo/config.toml` and merge it to `.cargo/config` like:

[target.'cfg(target_os="linux")']
rustflags = "-Clink-arg=-Wl,-soname=libnmstate.so.2"

But with rust-toolset-1.75.0-1.el9.noarch changed the %cargo_build to use `RUSTFLAGS` which override any changes to `.cargo/config` regarding `rustflags`.

I found a workaround by using

%if 0%{?rhel}
# RHEL does not have patchelf, hence we need to solve the SONAME problem
# by ourselves: https://github.com/rust-lang/cargo/issues/5045
%define _package_note_status 1
%define _package_note_flags -Wl,-soname=libnmstate.so.2
%endif

Please provide the package NVR for which bug is seen:

rust-toolset-1.75.0-1.el9.noarch

How reproducible:

100%

Steps to reproduce

1. rebuild nmstate-2.2.22-1.el9
2. try to install its produced `nmstate-devel` rpm along with `nmstate-libs`

Expected results

No failure

Actual results

error: Failed dependencies:
libnmstate.so()(64bit) is needed by nmstate-2.2.22-1.el9.x86_64