package/python3/007-disable-extensions.patch

   1 Add infrastructure to disable the build of certain extensions
   2
   3 Some of the extensions part of the Python core have dependencies on
   4 external libraries (sqlite, tk, etc.) or are relatively big and not
   5 necessarly always useful (CJK codecs for example). By extensions, we
   6 mean part of Python modules that are written in C and therefore
   7 compiled to binary code.
   8
   9 Therefore, we introduce a small infrastructure that allows to disable
  10 some of those extensions. This can be done inside the configure.ac by
  11 adding values to the DISABLED_EXTENSIONS variable (which is a
  12 word-separated list of extensions).
  13
  14 The implementation works as follow :
  15
  16  * configure.ac defines a DISABLED_EXTENSIONS variable, which is
  17    substituted (so that when Makefile.pre is generated from
  18    Makefile.pre.in, the value of the variable is substituted). For
  19    now, this DISABLED_EXTENSIONS variable is empty, later patches will
  20    use it.
  21
  22  * Makefile.pre.in passes the DISABLED_EXTENSIONS value down to the
  23    variables passed in the environment when calling the setup.py
  24    script that actually builds and installs those extensions.
  25
  26  * setup.py is modified so that the existing "disabled_module_list" is
  27    filled with those pre-disabled extensions listed in
  28    DISABLED_EXTENSIONS.
  29
  30 Patch ported to python2.7 by Maxime Ripard <ripard@archos.com>, and
  31 then extended by Thomas Petazzoni
  32 <thomas.petazzoni@free-electrons.com>.
  33
  34 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  35 ---
  36  Makefile.pre.in |    4 ++++
  37  configure.ac    |    2 ++
  38  setup.py        |    5 ++++-
  39  3 files changed, 10 insertions(+), 1 deletion(-)
  40
  41 Index: b/Makefile.pre.in
  42 ===================================================================
  43 --- a/Makefile.pre.in
  44 +++ b/Makefile.pre.in
  45 @@ -180,6 +180,8 @@
  46  # configure script arguments
  47  CONFIG_ARGS=   @CONFIG_ARGS@
  48
  49 +# disabled extensions
  50 +DISABLED_EXTENSIONS=   @DISABLED_EXTENSIONS@
  51
  52  # Subdirectories with code
  53  SRCDIRS=       @SRCDIRS@
  54 @@ -577,6 +579,7 @@
  55         esac; \
  56         $(RUNSHARED) CC='$(CC)' LDSHARED='$(BLDSHARED)' OPT='$(OPT)' \
  57                 _TCLTK_INCLUDES='$(TCLTK_INCLUDES)' _TCLTK_LIBS='$(TCLTK_LIBS)' \
  58 +               DISABLED_EXTENSIONS="$(DISABLED_EXTENSIONS)" \
  59                 $(PYTHON_FOR_BUILD) $(srcdir)/setup.py $$quiet build
  60
  61  # Build static library
  62 @@ -1387,7 +1390,8 @@
  63  # Install the dynamically loadable modules
  64  # This goes into $(exec_prefix)
  65  sharedinstall: sharedmods
  66 -       $(RUNSHARED) $(PYTHON_FOR_BUILD) $(srcdir)/setup.py install \
  67 +       $(RUNSHARED) DISABLED_EXTENSIONS="$(DISABLED_EXTENSIONS)" \
  68 +               $(PYTHON_FOR_BUILD) $(srcdir)/setup.py install \
  69                 --prefix=$(prefix) \
  70                 --install-scripts=$(BINDIR) \
  71                 --install-platlib=$(DESTSHARED) \
  72 Index: b/configure.ac
  73 ===================================================================
  74 --- a/configure.ac
  75 +++ b/configure.ac
  76 @@ -2369,6 +2369,8 @@
  77
  78  PKG_PROG_PKG_CONFIG
  79
  80 +AC_SUBST(DISABLED_EXTENSIONS)
  81 +
  82  # Check for use of the system expat library
  83  AC_MSG_CHECKING(for --with-system-expat)
  84  AC_ARG_WITH(system_expat,
  85 Index: b/setup.py
  86 ===================================================================
  87 --- a/setup.py
  88 +++ b/setup.py
  89 @@ -39,7 +39,10 @@
  90  COMPILED_WITH_PYDEBUG = ('--with-pydebug' in sysconfig.get_config_var("CONFIG_ARGS"))
  91
  92  # This global variable is used to hold the list of modules to be disabled.
  93 -disabled_module_list = []
  94 +try:
  95 +    disabled_module_list = sysconfig.get_config_var("DISABLED_EXTENSIONS").split(" ")
  96 +except KeyError:
  97 +    disabled_module_list = list()
  98
  99  def add_dir_to_list(dirlist, dir):
 100      """Add the directory 'dir' to the list 'dirlist' (after any relative