I am trying to use a boost library inside my android application, using the NDK. I have found a couple of success stories here and here, but I can't say the same about me. I am specifically trying to use the library in this link, as well as the boost thread library. In the code below, I am only trying to include the thread library, not the math library. The process I used to build the boost libraries is pretty much the same as the first link I attached.
So far, it seems I have successfully built the boost libraries, but when I run ndk-build, I get the following error:
Prebuilt : libboost_thread.a /sources/ cp: omitting directory `path/to/ndk/sources/boost' make: *** [obj/local/armeabi/libboost_thread.a] Error 1
Obviously the cp: omitting directory... is not exactly an error. But the only thing I'm getting other than that is the next line, which doesn't really mean anything. Error 1
Here's my Android.mk file:
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_STATIC_LIBRARIES := boost_thread LOCAL_LDLIBS := lboost_system-gcc-md lboost_thread-gcc-md -lgnustl_static LOCAL_LDLIBS += lboost_system-gcc-md lboost_thread-gcc-md \ -L$(NDK_ROOT)/sources/cxx-stl/gnu-libstdc++/libs/armeabi \ -lgnustl_static LOCAL_SRC_FILES := #cpp_sources LOCAL_MODULE := com_example_ndkFile_CppMethods include $(BUILD_SHARED_LIBRARY) $(call import-module,boost)
And there's also an Android.mk file in path/to/ndk/sources/boost/:
LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE:= boost_thread LOCAL_SRC_FILES:= android/lib/libboost_thread.a LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH) include $(PREBUILT_STATIC_LIBRARY)
And my humble Application.mk file:
APP_ABI := armeabi armeabi-v7a APP_STL := gnustl_static APP_CPPFLAGS = -fexceptions
I built the boost libraries using bjam. All of the libboost_###.a files are in the sources/boost/android/lib folder.
What is the error I'm getting?
I built the boost libraries using Boost-for-Android. Then I have in my boost/include/lib directory the android makefile boost.mk
LOCAL_PATH := $(call my-dir) # boost_date_time # include $(CLEAR_VARS) LOCAL_MODULE := boost_date_time LOCAL_SRC_FILES := libboost_date_time-gcc-mt-1_53.a include $(PREBUILT_STATIC_LIBRARY) # boost_filesystem # include $(CLEAR_VARS) LOCAL_MODULE := boost_filesystem LOCAL_SRC_FILES := libboost_filesystem-gcc-mt-1_53.a include $(PREBUILT_STATIC_LIBRARY) # boost_thread # include $(CLEAR_VARS) LOCAL_MODULE := boost_thread LOCAL_SRC_FILES := libboost_thread-gcc-mt-1_53.a include $(PREBUILT_STATIC_LIBRARY) # boost_system # include $(CLEAR_VARS) LOCAL_MODULE := boost_system LOCAL_SRC_FILES := libboost_system-gcc-mt-1_53.a include $(PREBUILT_STATIC_LIBRARY) # boost_program_options # include $(CLEAR_VARS) LOCAL_MODULE := boost_program_options LOCAL_SRC_FILES := libboost_program_options-gcc-mt-1_53.a include $(PREBUILT_STATIC_LIBRARY) # boost_chrono # include $(CLEAR_VARS) LOCAL_MODULE := boost_chrono LOCAL_SRC_FILES := libboost_chrono-gcc-mt-1_53.a include $(PREBUILT_STATIC_LIBRARY)
and my module where i use some of the boost libraries looks like this
LOCAL_PATH := $(call my-dir) # SignalServer, executable # include $(CLEAR_VARS) LOCAL_CFLAGS := -DTIXML_USE_TICPP #LOCAL_CFLAGS += -DDEBUG LOCAL_STATIC_LIBRARIES := boost_thread \ boost_system \ boost_filesystem \ boost_program_options \ boost_chrono \ LOCAL_STATIC_LIBRARIES += ticpp \ tia \ tobicore \ tobiid \ tid \ gdf LOCAL_MODULE := signalserver LOCAL_C_INCLUDES := $(LOCAL_PATH)/include LOCAL_C_INCLUDES += $(LOCAL_PATH)/extern/include LOCAL_C_INCLUDES += $(LOCAL_PATH)/../boost/include/boost-1_53 LOCAL_SRC_FILES := #cpp source include $(BUILD_EXECUTABLE)
in addition I have an Android.mk where all subdir makefiles are listed
TOP_PATH := $(call my-dir) include $(TOP_PATH)/boost/lib/boost.mk include $(TOP_PATH)/signalserver/signalserver.mk . .
and my Application.mk:
APP_PLATFORM := android-14 APP_ABI := armeabi-v7a #APP_OPTIM := debug #NDK_DEBUG := 1 NDK_TOOLCHAIN_VERSION := 4.6 APP_STL := gnustl_static APP_CPPFLAGS := -fexceptions -frtti
Here: http://silverglint.com/boost-for-android/ you can find a simple and painless new way to build a modern (eg 1.64.0) version of boost for android. Works with clang and gcc.
Also included is a sample app that shows you how to use the boost binaries thus built.
