python3: Port python2 patches to reduce the interpreter size

Some of the python2 patches were left behind when doing the python3
package. This was because the python build system can now autodetect
what packages can be built in the system.

However, some of these patches are actually useful to reduce drastically
the size of the interpreter.

This patch ports the relevant patches to the python3 package, and adds a
new patch to remove the idle3 IDE as well from the interpreter.

Fixes #5696

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

1 files changed, 98 insertions, 0 deletions

diff --git a/package/python3/python3-012-disable-extensions.patch b/package/python3/python3-012-disable-extensions.patch
new file mode 100644
index 000000000..ed1d1e2d9
--- /dev/null
+++ b/package/python3/python3-012-disable-extensions.patch
@@ -0,0 +1,98 @@
+Add infrastructure to disable the build of certain extensions
+
+Some of the extensions part of the Python core have dependencies on
+external libraries (sqlite, tk, etc.) or are relatively big and not
+necessarly always useful (CJK codecs for example). By extensions, we
+mean part of Python modules that are written in C and therefore
+compiled to binary code.
+
+Therefore, we introduce a small infrastructure that allows to disable
+some of those extensions. This can be done inside the configure.ac by
+adding values to the DISABLED_EXTENSIONS variable (which is a
+word-separated list of extensions).
+
+The implementation works as follow :
+
+ * configure.ac defines a DISABLED_EXTENSIONS variable, which is
+   substituted (so that when Makefile.pre is generated from
+   Makefile.pre.in, the value of the variable is substituted). For
+   now, this DISABLED_EXTENSIONS variable is empty, later patches will
+   use it.
+
+ * Makefile.pre.in passes the DISABLED_EXTENSIONS value down to the
+   variables passed in the environment when calling the setup.py
+   script that actually builds and installs those extensions.
+
+ * setup.py is modified so that the existing "disabled_module_list" is
+   filled with those pre-disabled extensions listed in
+   DISABLED_EXTENSIONS.
+
+Patch ported to python2.7 by Maxime Ripard <ripard@archos.com>, and
+then extended by Thomas Petazzoni
+<thomas.petazzoni@free-electrons.com>.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ Makefile.pre.in |    4 ++++
+ configure.ac    |    2 ++
+ setup.py        |    5 ++++-
+ 3 files changed, 10 insertions(+), 1 deletion(-)
+
+Index: cpython/Makefile.pre.in
+===================================================================
+--- cpython.orig/Makefile.pre.in
++++ cpython/Makefile.pre.in
+@@ -155,6 +155,8 @@
+ # configure script arguments
+ CONFIG_ARGS=	@CONFIG_ARGS@
+ 
++# disabled extensions
++DISABLED_EXTENSIONS=	@DISABLED_EXTENSIONS@
+ 
+ # Subdirectories with code
+ SRCDIRS= 	@SRCDIRS@
+@@ -478,6 +480,7 @@
+ sharedmods: $(BUILDPYTHON) pybuilddir.txt
+ 	$(RUNSHARED) CC='$(CC)' LDSHARED='$(BLDSHARED)' OPT='$(OPT)' \
+ 		CONFIG_ARGS="$(CONFIG_ARGS)" \
++		DISABLED_EXTENSIONS="$(DISABLED_EXTENSIONS)" \
+ 		$(PYTHON_FOR_BUILD) $(srcdir)/setup.py build
+ 
+ # Build static library
+@@ -1185,6 +1188,7 @@
+ # This goes into $(exec_prefix)
+ sharedinstall: sharedmods
+ 	$(RUNSHARED) CONFIG_ARGS="$(CONFIG_ARGS)" \
++		DISABLED_EXTENSIONS="$(DISABLED_EXTENSIONS)" \
+ 		$(PYTHON_FOR_BUILD) $(srcdir)/setup.py install \
+ 	   	--prefix=$(prefix) \
+ 		--install-scripts=$(BINDIR) \
+Index: cpython/configure.ac
+===================================================================
+--- cpython.orig/configure.ac
++++ cpython/configure.ac
+@@ -2175,6 +2175,8 @@
+ 
+ AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
+ 
++AC_SUBST(DISABLED_EXTENSIONS)
++
+ # Check for use of the system expat library
+ AC_MSG_CHECKING(for --with-system-expat)
+ AC_ARG_WITH(system_expat,
+Index: cpython/setup.py
+===================================================================
+--- cpython.orig/setup.py
++++ cpython/setup.py
+@@ -34,7 +34,10 @@
+ sysconfig._CONFIG_VARS.update(os.environ)
+ 
+ # This global variable is used to hold the list of modules to be disabled.
+-disabled_module_list = []
++try:
++    disabled_module_list = sysconfig.get_config_var("DISABLED_EXTENSIONS").split(" ")
++except KeyError:
++    disabled_module_list = list()
+ 
+ def add_dir_to_list(dirlist, dir):
+     """Add the directory 'dir' to the list 'dirlist' (after any relative