Rework python.

contrib/crossrpms/gdb/build.add

@@ -18,13 +18,7 @@
     %{build_sim} \
     %{?with_system_readline:--with-system-readline} \
     --with-expat \
-%if "%{gdb_version}" >= "6.8.50"
-%if %{with python}
-    --with-python \
-%else
-    --without-python \
-%endif
-%endif
+    %{?with_python:--with-python}%{!?with_python:--without-python} \
     --with-sysroot=%{_prefix}/@tool_target@/sys-root \
     --prefix=%{_prefix} --bindir=%{_bindir} \
     --includedir=%{_includedir} --libdir=%{_libdir} \

contrib/crossrpms/gdb/gdb.add

@@ -18,6 +18,23 @@ BuildRequires:  %{_host_rpmprefix}gcc
 # Default: yes
 %bcond_without system_readline
 
+# Whether to build python support
+%if "%{_build}" != "%{_host}"
+# Can't build python Cdn-X
+%bcond_with python
+%else
+%if "%{gdb_version}" >= "7.3"
+# Python support is broken
+%bcond_with python
+%elseif "%{gdb_version}" >= "6.8.50"
+%bcond_without python
+%else
+# python is unsupported
+%bcond_with python
+%endif
+%endif
+%{?with_python:BuildRequires: %{_host_rpmprefix}python-devel}
+
 %if "@tool_target@" == "powerpc-rtems@rtems_api@"
 %if "%{_build}" != "%{_host}"
 # psim doesn't support Cdn-X
@@ -68,15 +85,6 @@ BuildRequires: %{_host_rpmprefix}expat-devel
 %{?with_system_readline:BuildRequires: %{_host_rpmprefix}readline-devel}
 BuildRequires:  %{_host_rpmprefix}ncurses-devel
 
-%if "%{gdb_version}" >= "6.8.50"
-%if "%{_build}" != "%{_host}"
-# Can't build python Cdn-X
-%bcond_with python
-%else
-%bcond_without python
-%endif
-%endif
-%{?with_python:BuildRequires: %{_host_rpmprefix}python-devel}
 
 %if %build_infos
 # Required for building the infos