Python for android for L

[Santhoshkumar Palanisamy]

Is python for android apk available for android L version?

[张世军]

I am trying now

[Santhoshkumar Palanisamy]

Any update on this?

[张世军]

After down the NDK-10c from the google android

/build/core/build-binary.mk:212:#ifneq (,$(filter true,$(NDK_APP_PIE) $(TARGET_PIE)))

211 # enable PIE for executable beyond certain API level, unless "-static"

212 #ifneq (,$(filter true,$(NDK_APP_PIE) $(TARGET_PIE)))

213 ifeq ($(call module-get-class,$(LOCAL_MODULE)),EXECUTABLE)

214 ifeq (,$(filter -static,$(TARGET_LDFLAGS) $(LOCAL_LDFLAGS) $(NDK_APP_LDFLAGS)))

215 LOCAL_CFLAGS += -fPIE

216 LOCAL_LDFLAGS += -fPIE -pie

217 endif

218 endif

219 #endif

I fix it , it is ok now

LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/data/python_env/com.googlecode.pythonforandroid/files/python/lib:/data/python_env/com.googlecode.pythonforandroid/files/python/lib/python2.6/lib-dynload:/data/python_env/extras/python

static int open_library(const char* name) {

719  TRACE("[ opening %s ]", name);

720

721  // If the name contains a slash, we should attempt to open it directly and not search the paths.

722  if (strchr(name, '/') != NULL) {

723    int fd = TEMP_FAILURE_RETRY(open(name, O_RDONLY | O_CLOEXEC));

724    if (fd != -1) {

725      return fd;

726    }

727    // ...but nvidia binary blobs (at least) rely on this behavior, so fall through for now.

728#if defined(__LP64__)

729    return -1;

730#endif

731  }

732

733  // Otherwise we try LD_LIBRARY_PATH first, and fall back to the built-in well known paths.

734  int fd = open_library_on_path(name, g_ld_library_paths);

735  if (fd == -1) {

736    fd = open_library_on_path(name, kDefaultLdPaths);

737  }

738  return fd;

91static const char* const kDefaultLdPaths[] = {

92#if defined(__LP64__)

93  "/vendor/lib64",

94  "/system/lib64",

95#else

96  "/vendor/lib",

97  "/system/lib",

98#endif

99  NULL

100};

in L, at runtime:LD_LIBRARY_PATH will be :/data/python_env/com.googlecode.pythonforandroid/files/python/lib:/data/python_env/com.googlecode.pythonforandroid/files/python/lib/python2.6/lib-dynload:/data/python_env/extras/python

and some .so is available in both python/lib folder and system/lib/lib64 folder, such as libcrypto libssl, libsqlite, libexpact. For these .so files, python 32 bit process load them from python/lib is ok, But the system CHMOD/PS etc cmd invoke from .py now also load the .so inside python/lib, this is hardcoded and will not fallabck to kDefaultLdPaths. Now issue comming, since chmod/ps/etc in 64 bit L should load the 64bit, and in 32 bit L need load the 32 bit.

So the resolution is:

1. remove all .so files inside python/lib if it is also available in system. this have potential risk if python need the specific version

2. rename all .so files which is also available in system to XXX_Python.so in python lib, and in Python Src code to change their name in the system Load API and rebuild.

On Wednesday, September 24, 2014 12:36:38 AM UTC+8, Santhoshkumar Palanisamy wrote:

[Anubhav Srivastava]

Hi Changshijun,
As you were able to successfully build python executable with PIE
can you please share the same with us ?

Thanks a lot,
Anubhav

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[shijun]

Yes, I sent the binary rar package.

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