python3: bump to 3.7.0

Other changes include:

 - Refreshing all necessary patches for 3.7.0

 - Add a hash for the license file.

 - Python no longer has it's own internal libffi, as such, host-libffi
   is now required to build host-python3, and is added as a
   dependency.

 - Drop PYTHON3_LIBTOOL_PATCH = NO, since there is no longer any
   internal libffi copy that was causing the libtool patching process
   to fail.

 - A new core module "uuid" is now is added in the Config.in file, and
   relies on util-linux's uuid library.

 - Also, a new patch: 0030-Fix-cross-compiling-the-uuid-module.patch
   is required to fix compiling the uuid module, because the include
   directory search path for uuid.h is hardcoded to /usr/include/uuid,
   which causes an "unsafe for cross-compilation" error during
   compiling if the host pc has uuid headers installed.

 - 0031-Add-an-option-to-disable-uuid-module.patch is added to allow
   disabling the Python3 UUID module, so that when
   BR2_PACKAGE_PYTHON3_UUID is disabled by the UUID library is
   present, the uuid Python module is not built, as expected.

 - 0032-fix-building-on-older-distributions.patch is added to change
   os.replace by os.rename in the update_file.py script to fix
   building on older Linux distributions that have older versions of
   python that don't include os.replace.

   os.rename acts in the same way as os.replace, but is cross-platform
   compatible. Because Buildroot is guaranteed to be built in a POSIX
   environment, it is safe to change replace to rename.

Tested on CentOS6 and Fedora28, All test results passed:
             br-arm-full [1/6]: OK
  br-arm-cortex-a9-glibc [2/6]: OK
   br-arm-cortex-m4-full [3/6]: SKIPPED
          br-x86-64-musl [4/6]: OK
      br-arm-full-static [5/6]: SKIPPED
armv5-ctng-linux-gnueabi [6/6]: OK
6 builds, 2 skipped, 0 build failed, 0 legal-info failed

Signed-off-by: Adam Duskett <aduskett@gmail.com>
[Thomas:
 - remove PYTHON3_LIBTOOL_PATCH = NO
 - improve the solution in patch 0030-Fix-cross-compiling-the-uuid-module
 - add patch 0031-Add-an-option-to-disable-uuid-module]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/package/python3/0030-Fix-cross-compiling-the-uuid-module.patch b/package/python3/0030-Fix-cross-compiling-the-uuid-module.patch
new file mode 100644
index 0000000000..93df02f6a2
--- /dev/null
+++ b/package/python3/0030-Fix-cross-compiling-the-uuid-module.patch
@@ -0,0 +1,38 @@
+From ad4537a75c798341824ab18bd1dc622f8dc2bc3a Mon Sep 17 00:00:00 2001
+From: Adam Duskett <aduskett@gmail.com>
+Date: Fri, 20 Jul 2018 10:17:39 -0400
+Subject: [PATCH] Fix cross compiling the uuid module
+
+Python 3.7 has a new _uuid module, however, the include directory
+search path for uuid.h is hardcoded to /usr/include/uuid, which should
+not be used when cross-compiling.
+
+To fix this, use the same solution as the one used by the NIS
+detection: append "uuid" to each of the include directories in
+"inc_dirs", instead of hardcoding /usr/include/uuid.
+
+Signed-off-by: Adam Duskett <aduskett@gmail.com>
+[Thomas: drop STAGING_DIR based solution, use a solution similar to
+the one used for the NIS detection.]
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
+---
+ setup.py | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/setup.py b/setup.py
+index 1a7085c5c4..f33d0b57b8 100644
+--- a/setup.py
++++ b/setup.py
+@@ -1627,7 +1627,8 @@ class PyBuildExt(build_ext):
+             missing.append('_tkinter')
+ 
+         # Build the _uuid module if possible
+-        uuid_incs = find_file("uuid.h", inc_dirs, ["/usr/include/uuid"])
++        uuid_incs = find_file("uuid.h", inc_dirs,
++                              [os.path.join(inc_dir, 'uuid') for inc_dir in inc_dirs])
+         if uuid_incs is not None:
+             if self.compiler.find_library_file(lib_dirs, 'uuid'):
+                 uuid_libs = ['uuid']
+-- 
+2.14.4
+