Revert "python3: add patch to fix PEP 3147 issue with automake built packages"

This reverts commit b58685355943d2c34606432d978d9efc6027f564, which
causes some build failures of Python 3:

  http://autobuild.buildroot.org/results/923/923c4242dbd6d277c1d88f663b5916ceced985d4/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

4 files changed, 118 insertions, 73 deletions

diff --git a/package/python3/004-old-stdlib-cache.patch b/package/python3/004-old-stdlib-cache.patch
new file mode 100644
index 0000000000..9ed7e59a9b
--- /dev/null
+++ b/package/python3/004-old-stdlib-cache.patch
@@ -0,0 +1,78 @@
+python3: Fix pyc-only related runtime exceptions
+
+Python3 changes the pyc lookup strategy, ignoring the
+__pycache__ directory if the .py file is missing. Change
+install location to enable use of .pyc without their parent .py
+
+See http://www.python.org/dev/peps/pep-3147
+
+Signed-off-by: Daniel Nelson <daniel@sigpwr.com>
+
+Index: b/configure.ac
+===================================================================
+--- a/configure.ac
++++ b/configure.ac
+@@ -352,6 +352,23 @@
+ AC_SUBST(FRAMEWORKUNIXTOOLSPREFIX)
+ AC_SUBST(FRAMEWORKINSTALLAPPSPREFIX)
+ 
++STDLIB_CACHE_FLAGS=
++AC_MSG_CHECKING(for --enable-old-stdlib-cache)
++AC_ARG_ENABLE(old-stdlib-cache,
++    AS_HELP_STRING([--enable-old-stdlib-cache], [enable pre-pep3147 stdlib cache]),
++[
++    if test "$enableval" = "yes"
++    then
++        STDLIB_CACHE_FLAGS="-b"
++    else
++        STDLIB_CACHE_FLAGS="" 
++    fi
++],
++[
++    STDLIB_CACHE_FLAGS="" 
++])
++AC_SUBST(STDLIB_CACHE_FLAGS)
++
+ ##AC_ARG_WITH(dyld,
+ ##            AS_HELP_STRING([--with-dyld],
+ ##                           [Use (OpenStep|Rhapsody) dynamic linker]))
+Index: b/Makefile.pre.in
+===================================================================
+--- a/Makefile.pre.in
++++ b/Makefile.pre.in
+@@ -162,6 +162,9 @@
+ # Options to enable prebinding (for fast startup prior to Mac OS X 10.3)
+ OTHER_LIBTOOL_OPT=@OTHER_LIBTOOL_OPT@
+ 
++# Option to enable old-style precompiled stdlib
++STDLIB_CACHE_FLAGS=@STDLIB_CACHE_FLAGS@
++
+ # Environment to run shared python without installed libraries
+ RUNSHARED=       @RUNSHARED@
+ 
+@@ -1247,21 +1250,21 @@
+ 	fi
+ 	-PYTHONPATH=$(DESTDIR)$(LIBDEST)  $(RUNSHARED) \
+ 		$(PYTHON_FOR_BUILD) -Wi $(DESTDIR)$(LIBDEST)/compileall.py \
+-		-d $(LIBDEST) -f \
++		-d $(LIBDEST) -f $(STDLIB_CACHE_FLAGS) \
+ 		-x 'bad_coding|badsyntax|site-packages|lib2to3/tests/data' \
+ 		$(DESTDIR)$(LIBDEST)
+ 	-PYTHONPATH=$(DESTDIR)$(LIBDEST) $(RUNSHARED) \
+ 		$(PYTHON_FOR_BUILD) -Wi -O $(DESTDIR)$(LIBDEST)/compileall.py \
+-		-d $(LIBDEST) -f \
++		-d $(LIBDEST) -f $(STDLIB_CACHE_FLAGS) \
+ 		-x 'bad_coding|badsyntax|site-packages|lib2to3/tests/data' \
+ 		$(DESTDIR)$(LIBDEST)
+ 	-PYTHONPATH=$(DESTDIR)$(LIBDEST)  $(RUNSHARED) \
+ 		$(PYTHON_FOR_BUILD) -Wi $(DESTDIR)$(LIBDEST)/compileall.py \
+-		-d $(LIBDEST)/site-packages -f \
++		-d $(LIBDEST)/site-packages -f $(STDLIB_CACHE_FLAGS) \
+ 		-x badsyntax $(DESTDIR)$(LIBDEST)/site-packages
+ 	-PYTHONPATH=$(DESTDIR)$(LIBDEST) $(RUNSHARED) \
+ 		$(PYTHON_FOR_BUILD) -Wi -O $(DESTDIR)$(LIBDEST)/compileall.py \
+-		-d $(LIBDEST)/site-packages -f \
++		-d $(LIBDEST)/site-packages -f $(STDLIB_CACHE_FLAGS) \
+ 		-x badsyntax $(DESTDIR)$(LIBDEST)/site-packages
+ 	-PYTHONPATH=$(DESTDIR)$(LIBDEST) $(RUNSHARED) \
+ 		$(PYTHON_FOR_BUILD) -m lib2to3.pgen2.driver $(DESTDIR)$(LIBDEST)/lib2to3/Grammar.txt
diff --git a/package/python3/005-pyc-pyo-conditional.patch b/package/python3/005-pyc-pyo-conditional.patch
index 0d60ff6949..c3b159da76 100644
--- a/package/python3/005-pyc-pyo-conditional.patch
+++ b/package/python3/005-pyc-pyo-conditional.patch
@@ -9,27 +9,27 @@ Index: b/Makefile.pre.in
 +ifeq (@PYC_BUILD@,yes)
  	-PYTHONPATH=$(DESTDIR)$(LIBDEST)  $(RUNSHARED) \
  		$(PYTHON_FOR_BUILD) -Wi $(DESTDIR)$(LIBDEST)/compileall.py \
- 		-d $(LIBDEST) -f \
+ 		-d $(LIBDEST) -f $(STDLIB_CACHE_FLAGS) \
  		-x 'bad_coding|badsyntax|site-packages|lib2to3/tests/data' \
  		$(DESTDIR)$(LIBDEST)
 +endif
 +ifeq (@PYO_BUILD@,yes)
  	-PYTHONPATH=$(DESTDIR)$(LIBDEST) $(RUNSHARED) \
  		$(PYTHON_FOR_BUILD) -Wi -O $(DESTDIR)$(LIBDEST)/compileall.py \
- 		-d $(LIBDEST) -f \
+ 		-d $(LIBDEST) -f $(STDLIB_CACHE_FLAGS) \
  		-x 'bad_coding|badsyntax|site-packages|lib2to3/tests/data' \
  		$(DESTDIR)$(LIBDEST)
 +endif
 +ifeq (@PYC_BUILD@,yes)
  	-PYTHONPATH=$(DESTDIR)$(LIBDEST)  $(RUNSHARED) \
  		$(PYTHON_FOR_BUILD) -Wi $(DESTDIR)$(LIBDEST)/compileall.py \
- 		-d $(LIBDEST)/site-packages -f \
+ 		-d $(LIBDEST)/site-packages -f $(STDLIB_CACHE_FLAGS) \
  		-x badsyntax $(DESTDIR)$(LIBDEST)/site-packages
 +endif
 +ifeq (@PYO_BUILD@,yes)
  	-PYTHONPATH=$(DESTDIR)$(LIBDEST) $(RUNSHARED) \
  		$(PYTHON_FOR_BUILD) -Wi -O $(DESTDIR)$(LIBDEST)/compileall.py \
- 		-d $(LIBDEST)/site-packages -f \
+ 		-d $(LIBDEST)/site-packages -f $(STDLIB_CACHE_FLAGS) \
  		-x badsyntax $(DESTDIR)$(LIBDEST)/site-packages
 +endif
  	-PYTHONPATH=$(DESTDIR)$(LIBDEST) $(RUNSHARED) \
diff --git a/package/python3/016-distutils-no-pep3147.patch b/package/python3/016-distutils-no-pep3147.patch
new file mode 100644
index 0000000000..0fdfeb24ca
--- /dev/null
+++ b/package/python3/016-distutils-no-pep3147.patch
@@ -0,0 +1,36 @@
+Add distutils fix for PEP 3147 issue
+
+Python 3 has a new standard for installing .pyc file, called PEP
+3147. Unfortunately, this standard requires both the .py and .pyc
+files to be installed for a Python module to be found. This is quite
+annoying on space-constrained embedded systems, since the .py file is
+technically not required for execution.
+
+For the Python standard library, our Python 3 package already contains
+a patch named python3-004-old-stdlib-cache.patch, which allows to
+disable the PEP 3147 installation.
+
+But that lives the distutils/setuptools package an unsolved
+problem. This patch therefore adds a new patch to Python, which makes
+distutils package use the traditional installation path when byte
+compiling, rather than the PEP 3147 installation path. Since
+setuptools relies on distutils internally, it also fixes setuptools
+based packages.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+
+Index: b/Lib/distutils/util.py
+===================================================================
+--- a/Lib/distutils/util.py
++++ b/Lib/distutils/util.py
+@@ -437,7 +437,9 @@
+             # Terminology from the py_compile module:
+             #   cfile - byte-compiled file
+             #   dfile - purported source filename (same as 'file' by default)
+-            if optimize >= 0:
++            if "_python_sysroot" in os.environ:
++                cfile = file + (__debug__ and "c" or "o")
++            elif optimize >= 0:
+                 cfile = importlib.util.cache_from_source(
+                     file, debug_override=not optimize)
+             else:
diff --git a/package/python3/020-importlib-no-pep3147.patch b/package/python3/020-importlib-no-pep3147.patch
deleted file mode 100644
index 779b5e27c3..0000000000
--- a/package/python3/020-importlib-no-pep3147.patch
+++ /dev/null
@@ -1,69 +0,0 @@
-Add importlib fix for PEP 3147 issue
-
-Python 3 has a new standard for installing .pyc file, called PEP
-3147. Unfortunately, this standard requires both the .py and .pyc
-files to be installed for a Python module to be found. This is quite
-annoying on space-constrained embedded systems, since the .py file is
-technically not required for execution.
-
-This patch changes cache_from_source() and source_from_cache() in
-importlib to get rid of the "__pycache__" directory.
-This effectively disables PEP 3147 for:
-
-* The python standard library
-* Packages built with distutils or setuptools
-* Packages built with automake that use the `py-compile` helper
-
-Signed-off-by: Christophe Vu-Brugier <cvubrugier@fastmail.fm>
-
-diff -purN a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
---- a/Lib/importlib/_bootstrap.py	2015-02-25 12:27:44.000000000 +0100
-+++ b/Lib/importlib/_bootstrap.py	2015-08-27 17:33:26.167191059 +0200
-@@ -444,8 +444,6 @@ def cache_from_source(path, debug_overri
-     If debug_override is not None, then it must be a boolean and is used in
-     place of sys.flags.optimize.
- 
--    If sys.implementation.cache_tag is None then NotImplementedError is raised.
--
-     """
-     debug = not sys.flags.optimize if debug_override is None else debug_override
-     if debug:
-@@ -454,33 +452,19 @@ def cache_from_source(path, debug_overri
-         suffixes = OPTIMIZED_BYTECODE_SUFFIXES
-     head, tail = _path_split(path)
-     base, sep, rest = tail.rpartition('.')
--    tag = sys.implementation.cache_tag
--    if tag is None:
--        raise NotImplementedError('sys.implementation.cache_tag is None')
--    filename = ''.join([(base if base else rest), sep, tag, suffixes[0]])
--    return _path_join(head, _PYCACHE, filename)
-+    filename = ''.join([(base if base else rest), suffixes[0]])
-+    return _path_join(head, filename)
- 
- 
- def source_from_cache(path):
-     """Given the path to a .pyc./.pyo file, return the path to its .py file.
- 
-     The .pyc/.pyo file does not need to exist; this simply returns the path to
--    the .py file calculated to correspond to the .pyc/.pyo file.  If path does
--    not conform to PEP 3147 format, ValueError will be raised. If
--    sys.implementation.cache_tag is None then NotImplementedError is raised.
-+    the .py file calculated to correspond to the .pyc/.pyo file.
- 
-     """
--    if sys.implementation.cache_tag is None:
--        raise NotImplementedError('sys.implementation.cache_tag is None')
--    head, pycache_filename = _path_split(path)
--    head, pycache = _path_split(head)
--    if pycache != _PYCACHE:
--        raise ValueError('{} not bottom-level directory in '
--                         '{!r}'.format(_PYCACHE, path))
--    if pycache_filename.count('.') != 2:
--        raise ValueError('expected only 2 dots in '
--                         '{!r}'.format(pycache_filename))
--    base_filename = pycache_filename.partition('.')[0]
-+    head, filename = _path_split(path)
-+    base_filename = filename.partition('.')[0]
-     return _path_join(head, base_filename + SOURCE_SUFFIXES[0])
- 
-