Add virtual provides for the bundled libmpdec (rhbz#1943359)

pypy3.spec

@@ -2,7 +2,7 @@
 Name:           pypy3
 Version:        %{basever}.1
 %global pyversion 3.6
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Python 3 implementation with a Just-In-Time compiler
 
 # LGPL and another free license we'd need to ask spot about are present in some
@@ -14,6 +14,13 @@ URL:            http://pypy.org/
 
 # High-level configuration of the build:
 
+# libmpdec (mpdecimal package in Fedora) is tightly coupled with the
+# decimal module. We keep it bundled as to avoid incompatibilities
+# with the packaged version.
+# The version information can be found at lib_pypy/_libmpdec/mpdecimal.h
+# defined as MPD_VERSION.
+%global libmpdec_version 2.4.1
+
 # Whether to use RPM build wheels from the python-{pip,setuptools}-wheel package
 # Uses upstream bundled prebuilt wheels otherwise
 %bcond_without rpmwheels
@@ -276,6 +283,10 @@ Provides: bundled(python3-pip) = 20.0.2
 Provides: bundled(python3-setuptools) = 44.0.0
 %endif
 
+# Provides for the bundled libmpdec
+Provides: bundled(mpdecimal) = %{libmpdec_version}
+Provides: bundled(libmpdec) = %{libmpdec_version}
+
 %description libs
 Libraries required by the various PyPy implementations of Python 3.
 
@@ -693,6 +704,13 @@ rm -f %{buildroot}%{pypyprefix}/bin/libpypy3-c.so.debug
 
 
 %check
+
+# Verify that the bundled libmpdec version python was compiled with, is the same version we have virtual
+# provides for in the SPEC.
+test "$(%{goal_dir}/pypy3-c -c 'import decimal; print(decimal.__libmpdec_version__.decode("ascii"))')" = \
+     "%{libmpdec_version}"
+
+
 topdir=$(pwd)
 
 SkipTest() {
@@ -860,6 +878,9 @@ CheckPyPy %{name}-stackless
 
 
 %changelog
+* Wed May 19 2021 Charalampos Stratakis <cstratak@redhat.com> - 7.3.1-5
+- Add virtual provides for the bundled libmpdec (rhbz#1943359)
+
 * Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 7.3.1-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild