Add new class variable to Recipe: stl_depends

This will allow us to know if some recipe depends on stl library, so we can load the corresponding stl library when our application initializes

Author: opacam

pythonforandroid/recipe.py

@@ -99,6 +99,19 @@ class Recipe(with_metaclass(RecipeMeta)):
     list of pure-Python packages to install via pip. If you need these packages
     at build time, you must create a recipe.'''
 
+    stl_depends = None
+    '''This should be a string which could be two values: ``c++_shared`` or
+    ``gnustl_shared``. It will meant that we depend on one of those shared
+    libs, so it must be loaded at runtime when the apk initialises.
+
+    .. note:: if you write a new recipe you should use c++_shared because it
+        will be the only one stl lib available starting from android ndk r18.
+
+    .. warning:: keep in mind that you should do the copy of the shared lib
+        inside the recipe, except if you inherit from the class
+        :class:`pythonforandroid.recipe.CppCompiledComponentsPythonRecipe`.
+    '''
+
     archs = ['armeabi']  # Not currently implemented properly
 
     @property
@@ -875,6 +888,7 @@ def rebuild_compiled_components(self, arch, env):
 class CppCompiledComponentsPythonRecipe(CompiledComponentsPythonRecipe):
     """ Extensions that require the cxx-stl """
     call_hostpython_via_targetpython = False
+    stl_depends = 'gnustl_shared'
 
     def get_recipe_env(self, arch):
         env = super(CppCompiledComponentsPythonRecipe, self).get_recipe_env(arch)

pythonforandroid/recipes/boost/__init__.py

@@ -13,6 +13,7 @@ class BoostRecipe(Recipe):
     # Don't forget to change the URL when changing the version
     url = 'http://downloads.sourceforge.net/project/boost/boost/{version}/boost_1_60_0.tar.bz2'
     depends = ['python2']
+    stl_depends = 'gnustl_shared'
     patches = ['disable-so-version.patch', 'use-android-libs.patch']
 
     def should_build(self, arch):

pythonforandroid/recipes/icu/__init__.py

@@ -12,6 +12,7 @@ class ICURecipe(NDKRecipe):
     url = 'http://download.icu-project.org/files/icu4c/57.1/icu4c-57_1-src.tgz'
 
     depends = [('python2', 'python3crystax'), 'hostpython2']  # installs in python
+    stl_depends = 'gnustl_shared'
     generated_libraries = [
         'libicui18n.so', 'libicuuc.so', 'libicudata.so', 'libicule.so']
 

pythonforandroid/recipes/leveldb/__init__.py

@@ -7,6 +7,7 @@ class LevelDBRecipe(Recipe):
     version = '1.18'
     url = 'https://github.com/google/leveldb/archive/v{version}.tar.gz'
     opt_depends = ['snappy']
+    stl_depends = 'gnustl_shared'
     patches = ['disable-so-version.patch', 'find-snappy.patch']
 
     def should_build(self, arch):

pythonforandroid/recipes/libzmq/__init__.py

@@ -8,6 +8,7 @@ class LibZMQRecipe(Recipe):
     version = '4.1.4'
     url = 'http://download.zeromq.org/zeromq-{version}.tar.gz'
     depends = ['python2']
+    stl_depends = 'gnustl_shared'
 
     def should_build(self, arch):
         super(LibZMQRecipe, self).should_build(arch)

pythonforandroid/recipes/protobuf_cpp/__init__.py

@@ -15,6 +15,7 @@ class ProtobufCppRecipe(PythonRecipe):
     url = 'https://github.com/google/protobuf/releases/download/v{version}/protobuf-python-{version}.tar.gz'
     call_hostpython_via_targetpython = False
     depends = ['cffi', 'setuptools']
+    stl_depends = 'gnustl_shared'
     site_packages_name = 'google/protobuf/pyext'
     protoc_dir = None