Add -signed-char and -gcc-10-s390x patches.

z3-gcc-10-s390x.patch

@@ -0,0 +1,15 @@
+Add explicit template instantiation to work around an s390x problem:
+https://bugzilla.redhat.com/show_bug.cgi?id=1794127
+
+--- a/src/util/lp/lar_solver.cpp
++++ b/src/util/lp/lar_solver.cpp
+@@ -829,6 +829,9 @@ void lar_solver::update_x_and_inf_costs_
+         update_x_and_inf_costs_for_column_with_changed_bounds(j);
+ }
+ 
++// See https://bugzilla.redhat.com/show_bug.cgi?id=1794127
++extern template void lp::lp_primal_core_solver<rational, lp::numeric_pair<rational> >::update_inf_cost_for_column_tableau(unsigned int);
++
+ void lar_solver::update_x_and_inf_costs_for_columns_with_changed_bounds_tableau() {
+     for (auto j : m_columns_with_changed_bound.m_index)
+         update_x_and_inf_costs_for_column_with_changed_bounds(j);

z3-signed-char.patch

@@ -0,0 +1,11 @@
+--- a/src/parsers/util/scanner.cpp
++++ b/src/parsers/util/scanner.cpp
+@@ -480,7 +480,7 @@ scanner::token scanner::scan() {
+             return read_number(ch, true);
+         case '#':
+             return read_bv_literal();
+-        case -1:
++        case static_cast<char>(-1):
+             m_state = EOF_TOKEN;
+             break;
+         default:

z3.spec

@@ -12,6 +12,10 @@ Source0:        https://github.com/Z3Prover/z3/archive/%{name}-%{version}.tar.gz
 Patch0:         %{name}-ocamldoc.patch
 # https://github.com/Z3Prover/z3/commit/e212159f4e941c78fc03239e0884f2f0454f581f
 Patch1:         %{name}-trailing-zeros32.patch
+# Fix a place where char is assumed to be signed
+Patch2:         %{name}-signed-char.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=1794127
+Patch3:         %{name}-gcc-10-s390x.patch
 
 BuildRequires:  doxygen
 BuildRequires:  gcc-c++
@@ -220,6 +224,7 @@ mv %{buildroot}%{_prefix}/lib/lib%{name}java.so %{buildroot}%{_libdir}/%{name}
 %changelog
 * Tue Jan 21 2020 Jerry James <loganjerry@gmail.com> - 4.8.7-4
 - Make -doc be archful (bz 1792740)
+- Add -signed-char and -gcc-10-s390x patches
 
 * Sun Jan 19 2020 Richard W.M. Jones <rjones@redhat.com> - 4.8.7-4
 - OCaml 4.10.0+beta1 rebuild.