first Android release

Finally, MPD runs on Android.  For some small value of "runs".  Very
much work left, too much to describe.

1 files changed, 300 insertions, 0 deletions

diff --git a/android/build.py b/android/build.py
new file mode 100755
index 000000000..c89baf216
--- /dev/null
+++ b/android/build.py
@@ -0,0 +1,300 @@
+#!/usr/bin/env python3
+
+import os.path
+import sys, shutil, subprocess
+import urllib.request
+import hashlib
+import re
+
+if len(sys.argv) < 3:
+    print("Usage: build.py SDK_PATH NDK_PATH [configure_args...]", file=sys.stderr)
+    sys.exit(1)
+
+sdk_path = sys.argv[1]
+ndk_path = sys.argv[2]
+configure_args = sys.argv[3:]
+
+if not os.path.isfile(os.path.join(sdk_path, 'tools', 'android')):
+    print("SDK not found in", ndk_path, file=sys.stderr)
+    sys.exit(1)
+
+if not os.path.isdir(ndk_path):
+    print("NDK not found in", ndk_path, file=sys.stderr)
+    sys.exit(1)
+
+# the path to the MPD sources
+mpd_path = os.path.dirname(os.path.dirname(sys.argv[0]))
+
+# output directories
+lib_path = os.path.abspath('lib')
+tarball_path = lib_path
+src_path = os.path.join(lib_path, 'src')
+build_path = os.path.join(lib_path, 'build')
+root_path = os.path.join(lib_path, 'root')
+
+# build host configuration
+build_arch = 'linux-x86_64'
+
+# redirect pkg-config to use our root directory instead of the default
+# one on the build host
+os.environ['PKG_CONFIG_LIBDIR'] = os.path.join(root_path, 'lib/pkgconfig')
+
+# select the NDK compiler
+gcc_version = '4.8'
+llvm_version = '3.3'
+
+# select the NDK target
+ndk_arch = 'arm'
+host_arch = 'arm-linux-androideabi'
+android_abi = 'armeabi-v7a'
+ndk_platform = 'android-14'
+
+# set up the NDK toolchain
+
+gcc_toolchain = os.path.join(ndk_path, 'toolchains', host_arch + '-' + gcc_version, 'prebuilt', build_arch)
+llvm_toolchain = os.path.join(ndk_path, 'toolchains', 'llvm-' + llvm_version, 'prebuilt', build_arch)
+ndk_platform_path = os.path.join(ndk_path, 'platforms', ndk_platform)
+target_root = os.path.join(ndk_platform_path, 'arch-' + ndk_arch)
+
+llvm_triple = 'armv7-none-linux-androideabi'
+
+def select_toolchain(use_cxx, use_clang):
+    global cc, cxx, ar, cflags, cxxflags, cppflags, ldflags, libs
+
+    target_arch = '-march=armv7-a -mfloat-abi=softfp'
+    if use_clang:
+        cc = os.path.join(llvm_toolchain, 'bin/clang')
+        cxx = os.path.join(llvm_toolchain, 'bin/clang++')
+        target_arch += ' -target ' + llvm_triple + ' -integrated-as -gcc-toolchain ' + gcc_toolchain
+    else:
+        cc = os.path.join(gcc_toolchain, 'bin', host_arch + '-gcc')
+        cxx = os.path.join(gcc_toolchain, 'bin', host_arch + '-g++')
+    ar = os.path.join(gcc_toolchain, 'bin', host_arch + '-ar')
+
+    libstdcxx_path = os.path.join(ndk_path, 'sources/cxx-stl/gnu-libstdc++', gcc_version)
+    libstdcxx_cppflags = '-isystem ' + os.path.join(libstdcxx_path, 'include') + ' -isystem ' + os.path.join(libstdcxx_path, 'libs', android_abi, 'include')
+    if use_clang:
+        libstdcxx_cppflags += ' -D__STRICT_ANSI__'
+    libstdcxx_ldadd = os.path.join(libstdcxx_path, 'libs', android_abi, 'libgnustl_static.a')
+
+    cflags = '-Os -g ' + target_arch
+    cxxflags = '-Os -g ' + target_arch
+    cppflags = '--sysroot=' + target_root
+    ldflags = '--sysroot=' + target_root
+    libs = ''
+
+    if use_cxx:
+        libs += ' ' + libstdcxx_ldadd
+        cppflags += ' ' + libstdcxx_cppflags
+
+def file_md5(path):
+    """Calculate the MD5 checksum of a file and return it in hexadecimal notation."""
+
+    with open(path, 'rb') as f:
+        m = hashlib.md5()
+        while True:
+            data = f.read(65536)
+            if len(data) == 0:
+                # end of file
+                return m.hexdigest()
+            m.update(data)
+
+def download_tarball(url, md5):
+    """Download a tarball, verify its MD5 checksum and return the local path."""
+
+    global tarball_path
+    os.makedirs(tarball_path, exist_ok=True)
+    path = os.path.join(tarball_path, os.path.basename(url))
+
+    try:
+        calculated_md5 = file_md5(path)
+        if md5 == calculated_md5: return path
+        os.unlink(path)
+    except FileNotFoundError:
+        pass
+
+    tmp_path = path + '.tmp'
+
+    print("download", url)
+    urllib.request.urlretrieve(url, tmp_path)
+    calculated_md5 = file_md5(tmp_path)
+    if calculated_md5 != md5:
+        os.unlink(tmp_path)
+        raise "MD5 mismatch"
+
+    os.rename(tmp_path, path)
+    return path
+
+class Project:
+    def __init__(self, url, md5, installed, name=None, version=None,
+                 use_cxx=False, use_clang=False):
+        basename = os.path.basename(url)
+        m = re.match(r'^(.+)\.(tar(\.(gz|bz2|xz|lzma))?|zip)$', basename)
+        if not m: raise
+        self.base = m.group(1)
+
+        if name is None or version is None:
+            m = re.match(r'^([-\w]+)-(\d[\d.]*)$', self.base)
+            if name is None: name = m.group(1)
+            if version is None: version = m.group(2)
+
+        self.name = name
+        self.version = version
+
+        self.url = url
+        self.md5 = md5
+        self.installed = installed
+
+        self.use_cxx = use_cxx
+        self.use_clang = use_clang
+
+    def download(self):
+        return download_tarball(self.url, self.md5)
+
+    def is_installed(self):
+        global root_path
+        tarball = self.download()
+        installed = os.path.join(root_path, self.installed)
+        tarball_mtime = os.path.getmtime(tarball)
+        try:
+            return os.path.getmtime(installed) >= tarball_mtime
+        except FileNotFoundError:
+            return False
+
+    def unpack(self):
+        global src_path
+        tarball = self.download()
+        path = os.path.join(src_path, self.base)
+        try:
+            shutil.rmtree(path)
+        except FileNotFoundError:
+            pass
+        os.makedirs(src_path, exist_ok=True)
+        subprocess.check_call(['/bin/tar', 'xfC', tarball, src_path])
+        return path
+
+    def make_build_path(self):
+        path = os.path.join(build_path, self.base)
+        try:
+            shutil.rmtree(path)
+        except FileNotFoundError:
+            pass
+        os.makedirs(path, exist_ok=True)
+        return path
+
+class AutotoolsProject(Project):
+    def __init__(self, url, md5, installed, configure_args=[], **kwargs):
+        Project.__init__(self, url, md5, installed, **kwargs)
+        self.configure_args = configure_args
+
+    def build(self):
+        src = self.unpack()
+        build = self.make_build_path()
+
+        select_toolchain(use_cxx=self.use_cxx, use_clang=self.use_clang)
+        configure = [
+            os.path.join(src, 'configure'),
+            'CC=' + cc,
+            'CXX=' + cxx,
+            'CFLAGS=' + cflags,
+            'CXXFLAGS=' + cxxflags,
+            'CPPFLAGS=' + cppflags,
+            'LDFLAGS=' + ldflags,
+            'LIBS=' + libs,
+            'AR=' + ar,
+            '--host=' + host_arch,
+            '--prefix=' + root_path,
+            '--with-sysroot=' + target_root,
+            '--enable-silent-rules',
+        ] + self.configure_args
+
+        subprocess.check_call(configure, cwd=build)
+        subprocess.check_call(['/usr/bin/make', '--quiet', '-j12'], cwd=build)
+        subprocess.check_call(['/usr/bin/make', '--quiet', 'install'], cwd=build)
+
+# a list of third-party libraries to be used by MPD on Android
+thirdparty_libs = [
+    AutotoolsProject(
+        'http://downloads.xiph.org/releases/ogg/libogg-1.3.1.tar.xz',
+        'ca25d8da0ddfc8c6cbbf78d847a209fe',
+        'lib/libogg.a',
+        ['--disable-shared', '--enable-static'],
+    ),
+
+    AutotoolsProject(
+        'http://downloads.xiph.org/releases/vorbis/libvorbis-1.3.4.tar.xz',
+        '55f2288055e44754275a17c9a2497391',
+        'lib/libvorbis.a',
+        ['--disable-shared', '--enable-static'],
+    ),
+
+    AutotoolsProject(
+        'https://svn.xiph.org/releases/flac/flac-1.3.0.tar.xz',
+        '13b5c214cee8373464d3d65dee362cdd',
+        'lib/libFLAC.a',
+        [
+            '--disable-shared', '--enable-static',
+            '--disable-xmms-plugin', '--disable-cpplibs',
+        ],
+        use_clang=True,
+    ),
+
+    AutotoolsProject(
+        'http://curl.haxx.se/download/curl-7.35.0.tar.lzma',
+        'ad7d63864414c61246450dc5e2248c7b',
+        'lib/libcurl.a',
+        [
+            '--disable-shared', '--enable-static',
+            '--disable-debug',
+            '--enable-http',
+            '--enable-ipv6',
+            '--disable-ftp', '--disable-file',
+            '--disable-ldap', '--disable-ldaps',
+            '--disable-rtsp', '--disable-proxy', '--disable-dict', '--disable-telnet',
+            '--disable-tftp', '--disable-pop3', '--disable-imap', '--disable-smtp',
+            '--disable-gopher',
+            '--disable-manual',
+            '--disable-threaded-resolver', '--disable-verbose', '--disable-sspi',
+            '--disable-crypto-auth', '--disable-ntlm-wb', '--disable-tls-srp', '--disable-cookies',
+            '--without-ssl', '--without-gnutls', '--without-nss', '--without-libssh2',
+        ],
+        use_clang=True,
+    ),
+]
+
+# build the third-party libraries
+for x in thirdparty_libs:
+    if not x.is_installed():
+        x.build()
+
+# configure and build MPD
+select_toolchain(use_cxx=True, use_clang=True)
+
+configure = [
+    os.path.join(mpd_path, 'configure'),
+    'CC=' + cc,
+    'CXX=' + cxx,
+    'CFLAGS=' + cflags,
+    'CXXFLAGS=' + cxxflags,
+    'CPPFLAGS=' + cppflags,
+    'LDFLAGS=' + ldflags,
+    'LIBS=' + libs,
+    'AR=' + ar,
+    '--host=' + host_arch,
+    '--prefix=' + root_path,
+    '--with-sysroot=' + target_root,
+    '--with-android-sdk=' + sdk_path,
+
+    '--enable-silent-rules',
+
+    '--disable-glib',
+
+    # disabled for now because these features require GLib:
+    '--disable-database',
+    '--disable-httpd-output',
+    '--disable-vorbis-encoder',
+
+] + configure_args
+
+subprocess.check_call(configure)
+subprocess.check_call(['/usr/bin/make', '--quiet', '-j12'])