Add a minimum patch to support ruby 2.7

libprelude-5.1.1-ruby27.patch

@@ -0,0 +1,11 @@
+--- libprelude-5.1.1/bindings/ruby/Prelude.cxx.ruby27	2019-10-15 05:33:03.117000000 +0900
++++ libprelude-5.1.1/bindings/ruby/Prelude.cxx	2020-01-19 20:13:37.324557838 +0900
+@@ -1260,7 +1260,7 @@ SWIGRUNTIME void SWIG_RubyInitializeTrac
+     swig_ruby_trackings = (st_table*)NUM2SWIG(trackings_value);
+   }
+ 
+-  rb_define_virtual_variable("SWIG_TRACKINGS_COUNT", swig_ruby_trackings_count, NULL);
++  rb_define_virtual_variable("SWIG_TRACKINGS_COUNT", swig_ruby_trackings_count, (rb_gvar_setter_t *)NULL);
+ }
+ 
+ /* Add a Tracking from a C/C++ struct to a Ruby object */

libprelude.spec

@@ -7,7 +7,7 @@
 
 Name:           libprelude
 Version:        5.1.1
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Secure Connections between all Sensors and the Prelude Manager
 # Prelude is GPL-2.0+
 # libmissing is LGPL-2.1+
@@ -33,6 +33,10 @@ Patch9:         libprelude-5.1.0-linking.patch
 Patch10:        libprelude-5.1.0-fix_libprelude-error_on_gnu.patch
 Patch11:        libprelude-5.1.0-disable_test-poll_on_kfreebsd.patch
 Patch12:        libprelude-5.1.0-fix-test_rwlock1.patch
+# https://github.com/swig/swig/issues/1689
+# https://github.com/swig/swig/pull/1692
+# For now, add a minimum patch to support ruby2.7
+Patch13:        libprelude-5.1.1-ruby27.patch
 BuildRequires:  gcc
 BuildRequires:  gcc-c++
 BuildRequires:  bison
@@ -229,6 +233,9 @@ find %{buildroot} -name '.packlist' -delete
 %doc AUTHORS ChangeLog README NEWS
 
 %changelog
+* Sun Jan 19 2020 Mamoru TASAKA <mtasaka@fedoraproject.org> - 5.1.1-3
+- Add a minimum patch to support ruby 2.7
+
 * Sun Nov 10 2019 Thomas Andrejak <thomas.andrejak@gmail.com> - 5.1.1-2
 - Add missing patches