Add test for building an rpm with -fopenmp

tests/openmp-rpm/main.fmf

@@ -0,0 +1,6 @@
+summary: Test build a simple RPM package to ensure that -fopenmp works
+require:
+  - dnf
+  - dnf-plugins-core
+  - rpm-build
+test: ./runtest.sh

tests/openmp-rpm/runtest.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+set -ex
+
+dnf -y build-dep test.spec
+rpmbuild --define '_sourcedir .' --define '_builddir .' -bb test.spec

tests/openmp-rpm/test.c

@@ -0,0 +1,7 @@
+int main(int argc, char **argv) {
+  int res = 1;
+#pragma omp parallel
+#pragma omp single
+  res = 0;
+  return res;
+}

tests/openmp-rpm/test.spec

@@ -0,0 +1,34 @@
+%global toolchain clang
+
+Name: test
+Version: 1
+Release: 1
+Summary: Test package for checking that RPM packages using -fopenmp build correctly
+License: MIT
+
+BuildRequires: clang
+BuildRequires: libomp
+
+Source0: test.c
+
+%description
+clang was adding RUNPATH to binaries that use OpenMP, and since RUNPATH
+is prohibited in Fedora builds, this was causing packages using clang
+and OpenMP to fail to build.
+
+References:
+https://fedoraproject.org/wiki/Changes/Broken_RPATH_will_fail_rpmbuild
+https://github.com/llvm/llvm-project/commit/9b9d08111b618d74574ba03e5cc3d752ecc56f55
+
+%build
+clang ${CFLAGS} -fopenmp %{SOURCE0} -o main
+
+%check
+./main
+
+%install
+install -d %{buildroot}%{_bindir}
+install main %{buildroot}%{_bindir}
+
+%files
+%{_bindir}/main