Introduce cython_compile bcond

Cython.spec

@@ -3,6 +3,10 @@
 
 %bcond_without tests
 
+# This bcond allows to ship a non-compiled version
+# Slower, but sometimes necessary with alpha Python versions
+%bcond_without cython_compile
+
 Name:           Cython
 Version:        0.29.22
 %global upver %{version_no_tilde %{nil}}
@@ -22,7 +26,14 @@ Source:         https://github.com/cython/cython/archive/%{upver}/%{srcname}-%{v
 #   See also: https://github.com/cython/cython/issues/3614
 Patch3106:      class-static-method-workaround.patch
 
+%if %{with cython_compile}
 BuildRequires:  gcc
+%global python3_site %{python3_sitearch}
+%else
+BuildArch:      noarch
+%global python3_site %{python3_sitelib}
+%endif
+
 %if %{with tests}
 BuildRequires:  gcc-c++
 %endif
@@ -70,7 +81,7 @@ cython-mode is an Emacs major mode for editing Cython source files.
 %autosetup -n %{upname}-%{upver} -p1
 
 %build
-%py3_build
+%py3_build -- %{!?with_cython_compile:--no-cython-compile}
 
 # emacs-cython-mode build
 echo ";;
@@ -80,7 +91,7 @@ cp -p Tools/cython-mode.el .
 
 
 %install
-%py3_install
+%py3_install -- %{!?with_cython_compile:--no-cython-compile}
 rm -rf %{buildroot}%{python3_sitelib}/setuptools/tests
 
 # emacs-cython-mode install
@@ -105,11 +116,11 @@ cp -p cython-mode-init.el cython-mode-init.elc %{buildroot}%{_emacs_sitestartdir
 %{_bindir}/cython
 %{_bindir}/cygdb
 %{_bindir}/cythonize
-%{python3_sitearch}/%{srcname}-*.egg-info/
-%{python3_sitearch}/%{srcname}/
-%{python3_sitearch}/pyximport/
-%{python3_sitearch}/%{upname}.py
-%{python3_sitearch}/__pycache__/%{upname}.*
+%{python3_site}/%{srcname}-*.egg-info/
+%{python3_site}/%{srcname}/
+%{python3_site}/pyximport/
+%{python3_site}/%{upname}.py
+%{python3_site}/__pycache__/%{upname}.*
 
 %files -n emacs-cython-mode
 %license LICENSE.txt