python3: port some patches from python

Based on the idea that 'what-works-on-python-should-work-on-python3'
because they share the same trunk, these patches have been copied over
from the python package.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python3/patches/005-fix-libffi-x86-64-configure.patch

@@ -0,0 +1,31 @@
+diff --git a/Modules/_ctypes/libffi/configure b/Modules/_ctypes/libffi/configure
+index 75f62a7..4d6c9f2 100755
+--- a/Modules/_ctypes/libffi/configure
++++ b/Modules/_ctypes/libffi/configure
+@@ -17257,20 +17257,12 @@ case "$host" in
+ 	fi
+ 	;;
+ 
+-  i?86-*-* | x86_64-*-*)
+-	TARGETDIR=x86
+-	if test $ac_cv_sizeof_size_t = 4; then
+-	  case "$host" in
+-	    *-gnux32)
+-	      TARGET=X86_64
+-	      ;;
+-	    *)
+-	      TARGET=X86
+-	      ;;
+-          esac
+-	else
+-	  TARGET=X86_64;
+-	fi
++  i?86-*-*)
++	TARGET=X86; TARGETDIR=x86
++	;;
++
++  x86_64-*-*)
++	TARGET=X86_64; TARGETDIR=x86
+ 	;;
+ 
+   ia64*-*-*)

lang/python3/patches/006-remove-debian-multiarch-support.patch

@@ -0,0 +1,12 @@
+diff --git a/setup.py b/setup.py
+index 7868b7b..9ae0ef2 100644
+--- a/setup.py
++++ b/setup.py
+@@ -444,7 +444,6 @@ class PyBuildExt(build_ext):
+             add_dir_to_list(self.compiler.include_dirs, '/usr/local/include')
+         if cross_compiling:
+             self.add_gcc_paths()
+-        self.add_multiarch_paths()
+ 
+         # Add paths specified in the environment variables LDFLAGS and
+         # CPPFLAGS for header and library files.

lang/python3/patches/007-distutils-do-not-adjust-path.patch

@@ -0,0 +1,10 @@
+--- a/Lib/distutils/command/build_scripts.py
++++ b/Lib/distutils/command/build_scripts.py
+@@ -89,6 +89,7 @@ class build_scripts (Command):
+                     adjust = 1
+                     post_interp = match.group(1) or ''
+ 
++            adjust = 0
+             if adjust:
+                 log.info("copying and adjusting %s -> %s", script,
+                          self.build_dir)

lang/python3/patches/010-do-not-add-rt-lib-dirs-when-cross-compiling.patch

@@ -0,0 +1,15 @@
+diff --git a/setup.py b/setup.py
+index 7868b7b..544fa7e 100644
+--- a/setup.py
++++ b/setup.py
+@@ -452,8 +452,9 @@ class PyBuildExt(build_ext):
+         # directly since an inconsistently reproducible issue comes up where
+         # the environment variable is not set even though the value were passed
+         # into configure and stored in the Makefile (issue found on OS X 10.3).
++        rt_lib_dirs = [] if cross_compiling else self.compiler.runtime_library_dirs
+         for env_var, arg_name, dir_list in (
+-                ('LDFLAGS', '-R', self.compiler.runtime_library_dirs),
++                ('LDFLAGS', '-R', rt_lib_dirs),
+                 ('LDFLAGS', '-L', self.compiler.library_dirs),
+                 ('CPPFLAGS', '-I', self.compiler.include_dirs)):
+             env_val = sysconfig.get_config_var(env_var)