Fix building nispor in Konflux

In newer rust-toolset build flags are now only applied when the
%cargo_build macro is used, via the RUSTFLAGS environment variable
it sets. nispor uses make rather than %cargo_build, so need to export
RUSTFLAGS in %build explicitly.

Resolves: RHEL-159656

nispor.spec

@@ -1,6 +1,6 @@
 Name:           nispor
 Version:        1.2.14
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        API for network status querying
 License:        ASL 2.0
 URL:            https://github.com/nispor/nispor
@@ -108,15 +108,12 @@ This package contains C binding of %{name}.
 # Source1 is vendored dependencies
 %cargo_prep -V 1
 
-# The cargo_prep will create `.cargo/config` which take precedence over
-# `.cargo/config.toml` shipped by upstream which fix the SONAME of cdylib.
-# To workaround that, merge upstream rustflags into cargo_prep created one.
-_FLAGS=`sed -ne 's/rustflags = "\(.\+\)"/\1/p' .cargo/config.toml`
-sed -i -e "s/rustflags = \[\(.\+\), \]$/rustflags = [\1, \"$_FLAGS\"]/" \
-    .cargo/config
-rm .cargo/config.toml
-
 %build
+# Export RUSTFLAGS so that make's internal cargo invocation picks up the RPM
+# build flags (debuginfo, hardening) and the cdylib SONAME flag. The new
+# %%cargo_prep no longer embeds these in .cargo/config.toml, and %%cargo_build
+# is not used here because the Makefile drives the full build.
+export RUSTFLAGS="%{build_rustflags} -Clink-arg=-Wl,-soname=libnispor.so.1"
 make
 pushd src/python
 %py3_build
@@ -152,6 +149,9 @@ popd
 %{_libdir}/pkgconfig/nispor.pc
 
 %changelog
+* Tue Aug 18 2026 Jan Vaclav <jvaclav@redhat.com> - 1.2.14-2
+- Fix building nispor with Konflux (RHEL-159656)
+
 * Wed Sep 20 2023 Matej Focko <mfocko@redhat.com> - 1.2.14-1
 - New release 1.2.14 (Gris Ge)
 - bond: support changing bond mode (Gris Ge)