linux: add most scaffolding to support build _tkinter extension

With this patch, we can now build the _tkinter extension module.
However, it isn't enabled by default because of shared library
dependency bloat.

Author: indygreg

cpython-linux/build.py

@@ -663,7 +663,8 @@ def build_cpython(client, image, platform, debug=False, optimized=False, musl=Fa
 
     setup = derive_setup_local(static_modules_lines, python_archive,
                                python_version=entry['version'],
-                               musl=musl, debug=debug)
+                               musl=musl, debug=debug,
+                               disabled={b'_tkinter'})
 
     config_c_in = parse_config_c(setup['config_c_in'].decode('utf-8'))
     setup_dist_content = setup['setup_dist']
@@ -691,8 +692,7 @@ def build_cpython(client, image, platform, debug=False, optimized=False, musl=Fa
 
         install_tools_archive(container, archive_path('readline', platform, musl=musl))
         install_tools_archive(container, archive_path('sqlite', platform, musl=musl))
-        # tk requires a bunch of X11 stuff.
-        #install_tools_archive(container, archive_path('tcl', platform, musl=musl))
+        install_tools_archive(container, archive_path('tcl', platform, musl=musl))
         install_tools_archive(container, archive_path('uuid', platform, musl=musl))
         install_tools_archive(container, archive_path('xz', platform, musl=musl))
         install_tools_archive(container, archive_path('zlib', platform, musl=musl))

cpython-linux/static-modules

@@ -28,6 +28,7 @@ _ssl _ssl.c -I/tools/deps/include -lssl -lcrypto
 _testbuffer _testbuffer.c
 _testimportmultiple _testimportmultiple.c
 _testmultiphase _testmultiphase.c
+_tkinter _tkinter.c tkappinit.c -DWITH_APPINIT -I/tools/deps/include -I/usr/include/X11 -L/tools/deps/lib -ltcl8.6 -ltk8.6 -lX11
 _uuid _uuidmodule.c -I/tools/deps/include/uuid -luuid
 _xxtestfuzz _xxtestfuzz/_xxtestfuzz.c _xxtestfuzz/fuzzer.c
 ossaudiodev ossaudiodev.c

cpython-macos/build.py

@@ -38,6 +38,8 @@
 DISABLED_STATIC_MODULES = {
     # We don't support GDBM because it is GPL v3.
     b'_gdbm',
+    # Not yet supported.
+    b'_tkinter',
     # Not available on macOS.
     b'nis',
     # Not available on macOS.

pythonbuild/cpython.py

@@ -66,8 +66,6 @@
     # Our self-contained builds upset _testcapi and trigger a preprocessor
     # error.
     b'_testcapi',
-    # We don't yet support tcl/tk.
-    b'_tkinter',
 }