Improve test coverage.

Update scripts to use actions/setup-python to install different Python
versions.  Add run-faber.sh and get-py-env.py scripts.  Add
test-ubuntu-py-ver.yml CI script to test with different Python versions.

.github/workflows/test-ubuntu.yml

@@ -17,10 +17,22 @@ jobs:
         cxx: [g++, clang++]
         std: [c++11, c++14, c++17]
         include:
-          # Also test with free-threaded build of Python
           - python-version: '2.7'
             cxx: g++
             std: c++11
+          - python-version: '3.10'
+            cxx: g++
+            std: c++17
+          - python-version: '3.11'
+            cxx: g++
+            std: c++17
+          - python-version: '3.12'
+            cxx: g++
+            std: c++17
+          - python-version: '3.13'
+            cxx: g++
+            std: c++17
+          # Also test with free-threaded build of Python
           - python-version: '3.14t'
             cxx: clang++
             std: c++17
@@ -47,15 +59,10 @@ jobs:
         python3 -m pip install -U faber --break-system-packages
         echo "CXX=${{ matrix.cxx }}" >> "$GITHUB_ENV"
         echo "CXX_STD=${{ matrix.std }}" >> "$GITHUB_ENV"
-    - name: build
-      if: "${{ matrix.python-version  != '2.7' }}"
-      run: |
-        .github/run-faber.sh
-    - name: build
+    - name: build-py2
       if: "${{ matrix.python-version  == '2.7' }}"
       run: |
         python --version
-        echo ${BOOST_PY_DEPS}
         ${{ matrix.cxx }} --version
         faber -v
         sed -e "s/\$PYTHON/python/g" .ci/faber > ~/.faber
@@ -66,15 +73,14 @@ jobs:
           cxxflags=-std=${{ matrix.std }} \
           cppflags=-std=${{ matrix.std }} \
           -j`nproc`
-    - name: test
+    - name: build-py3
       if: "${{ matrix.python-version  != '2.7' }}"
       run: |
-        .github/run-faber.sh test.report
-    - name: test
+        .github/run-faber.sh
+    - name: test-py2
       if: "${{ matrix.python-version  == '2.7' }}"
       run: |
         faber \
-          --debug \
           --with-boost-include=${BOOST_PY_DEPS} \
           --builddir=build \
           cxx.name=${{ matrix.cxx }} \
@@ -82,3 +88,7 @@ jobs:
           cppflags=-std=${{ matrix.std }} \
           -j`nproc` \
           test.report
+    - name: test-py3
+      if: "${{ matrix.python-version  != '2.7' }}"
+      run: |
+        .github/run-faber.sh test.report

include/boost/python/module_init.hpp

@@ -127,7 +127,7 @@ BOOST_PYTHON_DECL PyObject* init_module(char const* name, void(*)());
 
 #  endif
 
-#  ifdef HAS_CXX11
+#  if defined(HAS_CXX11) && (PY_VERSION_HEX >= 0x03000000)
 #   define BOOST_PYTHON_MODULE_INIT(name, ...)                  \
   void BOOST_PP_CAT(init_module_,name)();                      \
 extern "C" BOOST_SYMBOL_EXPORT _BOOST_PYTHON_MODULE_INIT(name, __VA_ARGS__)
@@ -135,7 +135,7 @@ extern "C" BOOST_SYMBOL_EXPORT _BOOST_PYTHON_MODULE_INIT(name, __VA_ARGS__)
 #   define BOOST_PYTHON_MODULE_INIT(name)                       \
   void BOOST_PP_CAT(init_module_,name)();                      \
 extern "C" BOOST_SYMBOL_EXPORT _BOOST_PYTHON_MODULE_INIT(name)
-#  endif // HAS_CXX11
+#  endif // HAS_CXX11 && Python 3
 
 # endif
 

test/module_nogil.cpp

@@ -8,15 +8,15 @@ int get_value() {
     return 1234;
 }
 
-#ifdef HAS_CXX11
-// C++11 build: test with mod_gil_not_used option
+#if defined(HAS_CXX11) && (PY_VERSION_HEX >= 0x03000000)
+// C++11 build with Python 3: test with mod_gil_not_used option
 BOOST_PYTHON_MODULE(module_nogil_ext, boost::python::mod_gil_not_used())
 {
     using namespace boost::python;
     def("get_value", get_value);
 }
 #else
-// C++98 build: test without optional arguments
+// C++98 build or Python 2: test without optional arguments
 BOOST_PYTHON_MODULE(module_nogil_ext)
 {
     using namespace boost::python;