Add soft dependencies from main package to all the subpackages.

fio.spec

@@ -1,6 +1,6 @@
 Name:		fio
 Version:	3.23
-Release:	2%{?dist}
+Release:	3%{?dist}
 Summary:	Multithreaded IO generation tool
 
 License:	GPLv2
@@ -28,6 +28,26 @@ BuildRequires:	numactl-devel
 BuildRequires:	librdmacm-devel
 %endif
 
+# Main fio package has soft dependencies on all the engine
+# subpackages, but allows the engines to be uninstalled if not needed
+# or if the dependencies are too onerous.
+Recommends:     %{name}-engine-libaio
+%ifarch x86-64
+Recommends:     %{name}-engine-dev-dax
+Recommends:     %{name}-engine-http
+%endif
+Recommends:     %{name}-engine-nbd
+%ifarch x86_64
+Recommends:     %{name}-engine-pmemblk
+%endif
+%ifnarch %{arm} %{ix86}
+Recommends:     %{name}-engine-rados
+Recommends:     %{name}-engine-rbd
+%endif
+%ifnarch %{arm}
+Recommends:     %{name}-engine-rdma
+%endif
+
 %description
 fio is an I/O tool that will spawn a number of threads or processes doing
 a particular type of io action as specified by the user.  fio takes a
@@ -164,6 +184,9 @@ make install prefix=%{_prefix} mandir=%{_mandir} libdir=%{_libdir}/fio DESTDIR=$
 %endif
 
 %changelog
+* Thu Oct 01 2020 Richard W.M. Jones <rjones@redhat.com> 3.23-3
+- Add soft dependencies from main package to all the subpackages.
+
 * Thu Oct 01 2020 Richard W.M. Jones <rjones@redhat.com> 3.23-2
 - Enable dynamically loaded engines support.
 - Move license to %%license section.