tox.ini: When setting --with-system-python3=force, always provision the python3 depcheck dependencies

Author: Matthias Koeppe

tox.ini

@@ -529,7 +529,11 @@ setenv =
     #  - python
     #
     # Setting "--with-system-python3=yes" explicitly in case we change the configure default
-    # to "--with-system-python3=force" as originally proposed in #32060
+    # to "--with-system-python3=force" as originally proposed in #32060.
+    #
+    # For all factors that set "--with-system-python3=force",
+    # we add "_bootstrap liblzma bzip2 libffi libpng zlib" to EXTRA_SAGE_PACKAGES_5
+    # so that the configured python3 can be accepted by configure.
                                                                  PYTHON_MAJOR=3
                                                                    PYTHON_MINOR=10
     python3.9:                                                     PYTHON_MINOR=9
@@ -540,16 +544,20 @@ setenv =
     python3_spkg:                                                    CONFIG_CONFIGURE_ARGS_1=--without-system-python3
     python3.9,python3.10,python3.11,python3.12:                      CONFIG_CONFIGURE_ARGS_1=--with-system-python3=force --with-python=python{env:PYTHON_MAJOR}.{env:PYTHON_MINOR}
     python3.9,python3.10,python3.11,python3.12:                        EXTRA_SAGE_PACKAGES_5=_python{env:PYTHON_MAJOR}.{env:PYTHON_MINOR} _bootstrap liblzma bzip2 libffi libpng zlib
+    # As of 2023-9, Xcode 15.0.0, this is Python 3.9.6.
     macos-python3_xcode:                                             CONFIG_CONFIGURE_ARGS_1=--with-system-python3=force --with-python=/usr/bin/python3
-    macos-{python3_xcode,nohomebrew}-{python3.8}:                    CONFIG_CONFIGURE_ARGS_1=--with-system-python3=force --with-python=/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/{env:PYTHON_MAJOR}.{env:PYTHON_MINOR}/bin/python3
+    macos-python3_xcode:                                               EXTRA_SAGE_PACKAGES_5=_bootstrap liblzma bzip2 libffi libpng zlib
+    macos-{python3_xcode,nohomebrew}-{python3.9}:                    CONFIG_CONFIGURE_ARGS_1=--with-system-python3=force --with-python=/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/{env:PYTHON_MAJOR}.{env:PYTHON_MINOR}/bin/python3
     # Homebrew keg installs
-    homebrew-{python3.9,python3.10,python3.11,python3.12}: CONFIG_CONFIGURE_ARGS_1=--with-system-python3=force --with-python={env:HOMEBREW}/opt/python@{env:PYTHON_MAJOR}.{env:PYTHON_MINOR}/bin/python3
+    homebrew-{python3.9,python3.10,python3.11,python3.12}:           CONFIG_CONFIGURE_ARGS_1=--with-system-python3=force --with-python={env:HOMEBREW}/opt/python@{env:PYTHON_MAJOR}.{env:PYTHON_MINOR}/bin/python3
     # Installers from https://www.python.org/downloads/macos/ (must manually download and install)
     macos-python3_pythonorg:                                         CONFIG_CONFIGURE_ARGS_1=--with-system-python3=force --with-python=/Library/Frameworks/Python.framework/Versions/{env:PYTHON_MAJOR}.{env:PYTHON_MINOR}/bin/python3
+    macos-python3_pythonorg:                                           EXTRA_SAGE_PACKAGES_5=_bootstrap liblzma bzip2 libffi libpng zlib
     # https://github.com/pypa/manylinux
     manylinux-standard:                                              CONFIG_CONFIGURE_ARGS_1=--with-system-python3=force --with-python=/opt/python/cp{env:PYTHON_MAJOR}{env:PYTHON_MINOR}-cp{env:PYTHON_MAJOR}{env:PYTHON_MINOR}/bin/python3
     manylinux-{python3.9,python3.10,python3.11,python3.12}:            EXTRA_SAGE_PACKAGES_5=_bootstrap liblzma bzip2 libffi libpng
     conda:                                                           CONFIG_CONFIGURE_ARGS_1=--with-system-python3=force --with-python=python3
+    conda:                                                             EXTRA_SAGE_PACKAGES_5=_bootstrap liblzma bzip2 libffi libpng zlib
     #
     #  - toolchain
     #