fix build on EPEL 7

mpdecimal.spec

@@ -1,6 +1,9 @@
+# versioned documentation for old releases
+%{!?_pkgdocdir: %global _pkgdocdir %{_docdir}/%{name}-%{version}}
+
 Name:           mpdecimal
 Version:        2.4.2
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Library for general decimal arithmetic
 License:        BSD
 
@@ -52,7 +55,15 @@ make check
 %install
 %make_install
 rm -f %{buildroot}%{_libdir}/*.a
-rm -f %{buildroot}%{_pkgdocdir}/LICENSE.txt
+
+# license will go into dedicated directory
+rm -f %{buildroot}%{_docdir}/%{name}/LICENSE.txt
+
+# relocate documentation if versioned documentation is used
+if [ "%{_pkgdocdir}" != "%{_docdir}/%{name}" ]; then
+  install -d -m 0755 %{buildroot}%{_pkgdocdir}
+  mv -v %{buildroot}%{_docdir}/%{name}/* %{buildroot}%{_pkgdocdir}/
+fi
 
 %files
 %license LICENSE.txt
@@ -71,6 +82,9 @@ rm -f %{buildroot}%{_pkgdocdir}/LICENSE.txt
 %postun -p /sbin/ldconfig
 
 %changelog
+* Tue Aug 30 2016 Jan Vcelak <jvcelak@fedoraproject.org> - 2.4.2-5
+- fix build on EPEL 7
+
 * Tue Aug 30 2016 Jan Vcelak <jvcelak@fedoraproject.org> - 2.4.2-4
 - doc: use versioned Provides for bundled libraries