Adds zbar (and dependencies) support, refs #854

  - zbar Python extension
  - zbar library
  - iconv library

pythonforandroid/recipes/libiconv/__init__.py

@@ -0,0 +1,34 @@
+import os
+from pythonforandroid.toolchain import shprint, current_directory
+from pythonforandroid.recipe import Recipe
+from multiprocessing import cpu_count
+import sh
+
+
+class LibIconvRecipe(Recipe):
+
+    version = '1.15'
+
+    url = 'https://ftp.gnu.org/pub/gnu/libiconv/libiconv-{version}.tar.gz'
+
+    patches = ['libiconv-1.15-no-gets.patch']
+
+    def should_build(self, arch):
+        return not os.path.exists(
+                os.path.join(self.ctx.get_libs_dir(arch.arch), 'libiconv.so'))
+
+    def build_arch(self, arch):
+        super(LibIconvRecipe, self).build_arch(arch)
+        env = self.get_recipe_env(arch)
+        with current_directory(self.get_build_dir(arch.arch)):
+            shprint(
+                sh.Command('./configure'),
+                '--host=' + arch.toolchain_prefix,
+                '--prefix=' + self.ctx.get_python_install_dir(),
+                _env=env)
+            shprint(sh.make, '-j' + str(cpu_count()), _env=env)
+            libs = ['lib/.libs/libiconv.so']
+            self.install_libs(arch, *libs)
+
+
+recipe = LibIconvRecipe()

pythonforandroid/recipes/libiconv/libiconv-1.15-no-gets.patch

@@ -0,0 +1,22 @@
+hack until gzip pulls a newer gnulib version
+
+From 66712c23388e93e5c518ebc8515140fa0c807348 Mon Sep 17 00:00:00 2001
+From: Eric Blake <eblake@redhat.com>
+Date: Thu, 29 Mar 2012 13:30:41 -0600
+Subject: [PATCH] stdio: don't assume gets any more
+
+Gnulib intentionally does not have a gets module, and now that C11
+and glibc have dropped it, we should be more proactive about warning
+any user on a platform that still has a declaration of this dangerous
+interface.
+
+--- a/srclib/stdio.in.h
++++ b/srclib/stdio.in.h
+@@ -744,7 +744,6 @@ _GL_WARN_ON_USE (getline, "getline is un
+    removed it.  */
+ #undef gets
+ #if HAVE_RAW_DECL_GETS && !defined __cplusplus
+-_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
+ #endif
+
+ #if @GNULIB_OBSTACK_PRINTF@ || @GNULIB_OBSTACK_PRINTF_POSIX@

pythonforandroid/recipes/libzbar/__init__.py

@@ -0,0 +1,59 @@
+import os
+from pythonforandroid.toolchain import shprint, current_directory
+from pythonforandroid.recipe import Recipe
+from multiprocessing import cpu_count
+import sh
+
+
+class LibZBarRecipe(Recipe):
+
+    version = '0.10'
+
+    url = 'https://github.com/ZBar/ZBar/archive/{version}.zip'
+
+    depends = ['hostpython2', 'python2', 'libiconv']
+
+    patches = ["werror.patch"]
+
+    def should_build(self, arch):
+        return not os.path.exists(
+                os.path.join(self.ctx.get_libs_dir(arch.arch), 'libzbar.so'))
+
+    def get_recipe_env(self, arch=None, with_flags_in_cc=True):
+        env = super(LibZBarRecipe, self).get_recipe_env(arch, with_flags_in_cc)
+        libiconv = self.get_recipe('libiconv', self.ctx)
+        libiconv_dir = libiconv.get_build_dir(arch.arch)
+        env['CFLAGS'] += ' -I' + os.path.join(libiconv_dir, 'include')
+        env['LDSHARED'] = env['CC'] + \
+            ' -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions'
+        env['LDFLAGS'] += " -landroid -liconv"
+        return env
+
+    def build_arch(self, arch):
+        super(LibZBarRecipe, self).build_arch(arch)
+        env = self.get_recipe_env(arch)
+        with current_directory(self.get_build_dir(arch.arch)):
+            shprint(sh.Command('autoreconf'), '-vif', _env=env)
+            shprint(
+                sh.Command('./configure'),
+                '--host=' + arch.toolchain_prefix,
+                '--target=' + arch.toolchain_prefix,
+                '--prefix=' + self.ctx.get_python_install_dir(),
+                # Python bindings are compiled in a separated recipe
+                '--with-python=no',
+                '--with-gtk=no',
+                '--with-qt=no',
+                '--with-x=no',
+                '--with-jpeg=no',
+                '--with-imagemagick=no',
+                '--enable-pthread=no',
+                '--enable-video=no',
+                '--enable-shared=yes',
+                '--enable-static=no',
+                _env=env)
+            shprint(sh.make, '-j' + str(cpu_count()), _env=env)
+            libs = ['zbar/.libs/libzbar.so']
+            self.install_libs(arch, *libs)
+
+
+recipe = LibZBarRecipe()

pythonforandroid/recipes/libzbar/werror.patch

@@ -0,0 +1,13 @@
+diff --git a/configure.ac b/configure.ac
+index 256aedb..727caba 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -3,7 +3,7 @@ AC_PREREQ([2.61])
+ AC_INIT([zbar], [0.10], [spadix@users.sourceforge.net])
+ AC_CONFIG_AUX_DIR(config)
+ AC_CONFIG_MACRO_DIR(config)
+-AM_INIT_AUTOMAKE([1.10 -Wall -Werror foreign subdir-objects std-options dist-bzip2])
++AM_INIT_AUTOMAKE([1.10 -Wall foreign subdir-objects std-options dist-bzip2])
+ AC_CONFIG_HEADERS([include/config.h])
+ AC_CONFIG_SRCDIR(zbar/scanner.c)
+ LT_PREREQ([2.2])

pythonforandroid/recipes/zbar/__init__.py

@@ -0,0 +1,37 @@
+import os
+from pythonforandroid.recipe import PythonRecipe
+
+
+class ZBarRecipe(PythonRecipe):
+
+    version = '0.10'
+
+    # For some reason the version 0.10 on PyPI is not the same as the ones
+    # in sourceforge and GitHub. The one in PyPI has a setup.py.
+    # url = 'https://github.com/ZBar/ZBar/archive/{version}.zip'
+    url = 'https://pypi.python.org/packages/e0/5c/' + \
+        'bd2a96a9f2adacffceb4482cdd56831735ab5a67ea6a60c0a8757c17b62e' + \
+        '/zbar-{version}.tar.gz'
+
+    call_hostpython_via_targetpython = False
+
+    depends = ['hostpython2', 'python2', 'setuptools', 'libzbar']
+
+    patches = ["zbar-0.10-python-crash.patch"]
+
+    def get_recipe_env(self, arch=None, with_flags_in_cc=True):
+        env = super(ZBarRecipe, self).get_recipe_env(arch, with_flags_in_cc)
+        libzbar = self.get_recipe('libzbar', self.ctx)
+        libzbar_dir = libzbar.get_build_dir(arch.arch)
+        env['PYTHON_ROOT'] = self.ctx.get_python_install_dir()
+        env['CFLAGS'] += ' -I' + os.path.join(libzbar_dir, 'include')
+        env['CFLAGS'] += ' -I' + env['PYTHON_ROOT'] + '/include/python2.7'
+        # TODO
+        env['LDSHARED'] = env['CC'] + \
+            ' -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions'
+        # TODO: hardcoded Python version
+        env['LDFLAGS'] += " -landroid -lpython2.7 -lzbar"
+        return env
+
+
+recipe = ZBarRecipe()

pythonforandroid/recipes/zbar/zbar-0.10-python-crash.patch

@@ -0,0 +1,19 @@
+https://sourceforge.net/p/zbar/patches/37/
+
+fix from Debian for crashes when importing the python module.
+http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=702499
+
+this doesn't happen on some arches as the data naturally ends up with zero
+data after the structure, but on some (like arm), it isn't so we crash when
+python walks the list.
+
+--- a/imagescanner.c
++++ b/imagescanner.c
+@@ -68,6 +68,7 @@ imagescanner_get_results (zbarImageScanner *self,
+
+ static PyGetSetDef imagescanner_getset[] = {
+     { "results", (getter)imagescanner_get_results, },
++    { NULL },
+ };
+
+ static PyObject*