Buildozer doesn't compile app with cryptography requirement

[saband]

I'm trying to compile apk with cryptography requirement:

requirements = kivy,sqlite3,sqlalchemy,jnius,requests,cryptography

But it doesn't work. Error log:

[INFO]:    -> running autoreconf -vif
Exception in thread background thread for pid 3384:                            
Traceback (most recent call last):
  File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.5/threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
  File "/home/saband/.local/lib/python3.5/site-packages/sh.py", line 2170, in background_thread
    handle_exit_code(exit_code)
  File "/home/saband/.local/lib/python3.5/site-packages/sh.py", line 1929, in fn
    return self.command.handle_command_exit_code(exit_code)
  File "/home/saband/.local/lib/python3.5/site-packages/sh.py", line 672, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_1: 

  RAN: /usr/bin/autoreconf -vif

  STDOUT:
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4
autoreconf: configure.ac: tracing
autoreconf: running: libtoolize --copy --force
libtoolize: putting auxiliary files in '.'.
libtoolize: copying file './ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
libtoolize: copying file 'm4/libtool.m4'
libtoolize: copying file 'm4/ltoptions.m4'
libtoolize: copying file 'm4/ltsugar.m4'
libtoolize: copying file 'm4/ltversion.m4'
libtoolize: copying file 'm4/lt~obsolete.m4'
autoreconf: running: /usr/bin/autoconf --force
configure.ac:450: error: possibly undefined macro: LT_SYS_SYMBOL_USCORE
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
autoreconf: /usr/bin/autoconf failed with exit status: 1


  STDERR:


Traceback (most recent call last):
  File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/saband/python/kivy/myapp/.buildozer/android/platform/python-for-android-master/pythonforandroid/toolchain.py", line 916, in <module>
    main()
  File "/home/saband/python/kivy/myapp/.buildozer/android/platform/python-for-android-master/pythonforandroid/toolchain.py", line 913, in main
    ToolchainCL()
  File "/home/saband/python/kivy/myapp/.buildozer/android/platform/python-for-android-master/pythonforandroid/toolchain.py", line 514, in __init__
    getattr(self, args.subparser_name.replace('-', '_'))(args)
  File "/home/saband/python/kivy/myapp/.buildozer/android/platform/python-for-android-master/pythonforandroid/toolchain.py", line 147, in wrapper_func
    build_dist_from_args(ctx, dist, args)
  File "/home/saband/python/kivy/myapp/.buildozer/android/platform/python-for-android-master/pythonforandroid/toolchain.py", line 192, in build_dist_from_args
    build_recipes(build_order, python_modules, ctx)
  File "/home/saband/python/kivy/myapp/.buildozer/android/platform/python-for-android-master/pythonforandroid/build.py", line 572, in build_recipes
    recipe.build_arch(arch)
  File "/home/saband/python/kivy/myapp/.buildozer/android/platform/python-for-android-master/pythonforandroid/recipes/libffi/__init__.py", line 43, in build_arch
    shprint(sh.Command('autoreconf'), '-vif', _env=env)
  File "/home/saband/python/kivy/myapp/.buildozer/android/platform/python-for-android-master/pythonforandroid/logger.py", line 175, in shprint
    for line in output:
  File "/home/saband/.local/lib/python3.5/site-packages/sh.py", line 720, in next
    self.wait()
  File "/home/saband/.local/lib/python3.5/site-packages/sh.py", line 651, in wait
    self.handle_command_exit_code(exit_code)
  File "/home/saband/.local/lib/python3.5/site-packages/sh.py", line 672, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_1: 

  RAN: /usr/bin/autoreconf -vif

  STDOUT:
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4
autoreconf: configure.ac: tracing
autoreconf: running: libtoolize --copy --force
libtoolize: putting auxiliary files in '.'.
libtoolize: copying file './ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
libtoolize: copying file 'm4/libtool.m4'
libtoolize: copying file 'm4/ltoptions.m4'
libtoolize: copying file 'm4/ltsugar.m4'
libtoolize: copying file 'm4/ltversion.m4'
libtoolize: copying file 'm4/lt~obsolete.m4'
autoreconf: running: /usr/bin/autoconf --force
configure.ac:450: error: possibly undefined macro: LT_SYS_SYMBOL_USCORE
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
autoreconf: /usr/bin/autoconf failed with exit status: 1


  STDERR:

# Command failed: /usr/bin/python3 -m pythonforandroid.toolchain create --dist_name=myapp --bootstrap=sdl2 --requirements=kivy,sqlite3,sqlalchemy,jnius,requests,cryptography --arch armeabi-v7a --copy-libs --color=always --storage-dir=/home/saband/python/kivy/myapp/.buildozer/android/platform/build
# 
# Buildozer failed to execute the last command
# The error might be hidden in the log above this error
# Please read the full log, and search for it before
# raising an issue with buildozer itself.
# In case of a bug report, please add a full log with log_level = 2

Full log: https://pastebin.com/tEHEruHJ

[saband]

I've found the solution:
sudo apt install build-essential libltdl-dev libffi-dev libssl-dev python-dev
Then reinstall python and clean the .buildozer folder in the app folder.

[nesergen]

@saband your solution helped me, but I didn`t reinstall python

this is my command:
sudo apt install build-essential libltdl-dev libffi-dev libssl-dev

[Alexndegwa]

the above proposed solution doesn't work for me. has someone been able to solve this problem