so I'm relatively new to Android-NDK and trying to add an uncompiled c-library to android.
I've downloaded the library's source from here and followed these instructions to create a static library (.a-File) from the downloaded files using ndk-build.
So now I have a folder-structure that looks like this:
-srtp
--include (srtp.h, crypto.h)
--srtp (srtp.c...)
--obj
---local
----armeabi
-----libsrtp_static.a
In my Android-project I want to include srtp.h in a c-file inside my /jni/ folder. I've tried to just add the .a-file to the /jni folder but than it says "srtp.h no such file or direcotry". If I add the entire srtp-folder to the project and include the header with "srtp/include/srtp.h" it compiles but fails to link the source as I get the error "Undefined reference to srtp-function-call"
Here's my Android.mk (parts of it copied from Android.mk within the downloaded source):
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_LDLIBS := -llog
LOCAL_MODULE := ndk1 #name of my project
LOCAL_SRC_FILES := native.c #name of the c-source file
include $(BUILD_SHARED_LIBRARY)
LOCAL_PATH:= /home/dev/programing/srtp
common_SRC_FILES := \
srtp/srtp.c \
srtp/ekt.c \
crypto/cipher/cipher.c \
#...more files like that
common_CFLAGS := \
-DPOSIX -iquote$(LOCAL_PATH)/crypto/include \
-Werror \
-Wno-ignored-qualifiers \
-Wno-sign-compare \
-Wno-missing-field-initializers
common_C_INCLUDES = $(LOCAL_PATH)/include
# For the device
# =====================================================
# Device static library
include $(CLEAR_VARS)
ifneq ($(TARGET_ARCH),x86)
LOCAL_NDK_VERSION := 5
LOCAL_SDK_VERSION := 9
endif
LOCAL_SRC_FILES := libsrtp_static.a
LOCAL_CFLAGS += $(common_CFLAGS)
LOCAL_C_INCLUDES += /home/dev/programing/srtp/include
LOCAL_MODULE:= libsrtp_static
LOCAL_MODULE_TAGS := optional
include $(BUILD_STATIC_LIBRARY)
Any help is greatly appreciated! Thank you very much.
You need to add the reference to libsrtp_static from your lib (ndk1) declaration :
LOCAL_STATIC_LIBRARIES := libsrtp_static
Also, you don't need to copy all the strp sources to your project, only add this to your static prebuilt library definition
LOCAL_EXPORT_C_INCLUDES += /home/dev/programing/srtp/include
This path will then be automatically added to the LOCAL_C_INCLUDES of your library that is using the library.
Are you building libsrtp or just using a prebuilt static library ? If you're using a prebuilt (lib*.a), replace BUILD_STATIC_LIBRARY with PREBUILT_STATIC_LIBRARY and set only the .a as SRC_FILE:
In summary, once libstrp_static.a is built, this should work:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_LDLIBS := -llog
LOCAL_MODULE := ndk1 #name of my project
LOCAL_SRC_FILES := native.c #name of the c-source file
LOCAL_STATIC_LIBRARIES := libsrtp_static
include $(BUILD_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := /home/dev/programing/srtp/libsrtp_static.a #check path to libsrtp_static.a
LOCAL_EXPORT_C_INCLUDES += /home/dev/programing/srtp/include
LOCAL_MODULE:= libsrtp_static
LOCAL_MODULE_TAGS := optional
include $(BUILD_STATIC_LIBRARY)
Related
I have an NDK-based project (written mostly on C++) and I want to split its sources into two parts: "lib" (to be shared with other projects) and "app" (files specific to current project).
Now my Android.mk looks as follows:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := MyProj
MY_LIB_SOURCES := \
libfile1.cpp \
libfile2.cpp
MY_APP_SOURCES := \
appfile1.cpp \
appfile2.cpp
LOCAL_SRC_FILES += $(MY_LIB_SOURCES)
LOCAL_SRC_FILES += $(MY_APP_SOURCES)
LOCAL_STATIC_LIBRARIES := android_native_app_glue
include $(BUILD_SHARED_LIBRARY)
$(call import-module,android/native_app_glue)
The only reason for splitting is that I want to add/remove lib source file once, because now I have to change Android.mk for all projects which need sources from MY_LIB_SOURCES.
Do I have to create a separate project that would produce a shared library? Or should it be a static library? Or maybe it's possible to just #include somehow file that enumerates MY_LIB_SOURCES into Android.mk of each app?
We usually create a separate folder for library sources, e.g.
project
jni
appfile1.cpp
appfile2.cpp
Android.mk (1)
my_lib
libfile1.cpp
libfile2.cpp
Android.mk (2)
This is the first (application) Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := MyProj
MY_APP_SOURCES := \
appfile1.cpp \
appfile2.cpp
LOCAL_SRC_FILES += $(MY_APP_SOURCES)
LOCAL_STATIC_LIBRARIES := android_native_app_glue
LOCAL_STATIC_LIBRARIES += MyLib
include $(BUILD_SHARED_LIBRARY)
include $(LOCAL_PATH)/../../my_lib/Android.mk
$(call import-module,android/native_app_glue)
This is the second (library) Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := MyLib
MY_LIB_SOURCES := \
libfile1.cpp \
libfile2.cpp
LOCAL_SRC_FILES += $(MY_LIB_SOURCES)
include $(BUILD_STATIC_LIBRARY)
Using the Andorid.mk name for MyLib is by convention; you could use some other file name, and change the include statement (line 17 of the first Android.mk file) accordingly.
You could also use the same $(call import-module) syntax, like
$(call import-module,my_lib)
But to do so, you must provide a NDK_MODULE_PATH environment variable that includes $(LOCAL_PATH)/../../.
Your library will be rebuilt anew for each app (project) that includes it - either with the first naïve include method, or with $(call import-module) method. You can provide a prebuilt static library, but this is a different story.
You must divide your android.mk in two sections:
LOCAL_PATH := $(call my-dir)
## The lib ##
include $(CLEAR_VARS)
LOCAL_MODULE := my_lib
SRC_LIB := $(wildcard $(LOCAL_PATH)/*.cpp)
LOCAL_SRC_FILES := $(SRC_LIB:$(LOCAL_PATH)/%=%)
include $(PREBUILT_SHARED_LIBRARY)
## The App ##
include $(CLEAR_VARS)
LOCAL_MODULE := my_app
LOCAL_CPP_EXTENSION := .cxx .cpp .cc
LOCAL_SRC_FILES := \
appfile1.cpp \
appfile2.cpp
LOCAL_STATIC_LIBRARIES := android_native_app_glue
LOCAL_SHARED_LIBRARIES := my_lib
LOCAL_LDLIBS += -landroid
include $(BUILD_EXECUTABLE)
$(call import-module,android/native_app_glue)
If you want static library you have only to change include $(PREBUILT_SHARED_LIBRARY) to include $(PREBUILT_STATIC_LIBRARY) and LOCAL_SHARED_LIBRARIES := my_lib to LOCAL_STATIC_LIBRARIES += my_lib
I try to set up an Android NDK build based on CMake scripts, which dynamically create the required Android make files. While I can't use the JNI folder structure I split the build process in several separated make scripts:
1st Create root Android.mk file located in project root:
#ANDROID ROOT MAKEFILE
LOCAL_PATH := D:/binrev/repository/bar
include $(CLEAR_VARS)
MY_LOCAL_CFLAGS := -DDEBUG
include D:/binrev/repository/bar/src/Android.mk
2nd Create source Android.mk file in project source folder and perform module build:
$(info "[INFO] Source Makefile invoked")
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := bar
LOCAL_C_INCLUDES:= D:/binrev/repository/bar/include
LOCAL_SRC_FILES := bar.cpp
ifeq (debug,"debug")
MY_LOCAL_CFLAGS := -DDEBUG
endif
ifeq (false,true)
LOCAL_ARM_MODE := arm
endif
LOCAL_EXPORT_C_INCLUDES := D:/binrev/repository/bar/include
LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += -landroid
LOCAL_STATIC_LIBRARIES += foo
ifeq (OFF, ON)
include $(BUILD_SHARED_LIBRARY)
else
include $(BUILD_STATIC_LIBRARY)
endif
Basicly this mechanism works and I could compile my sources, but I fail if I try to include a Prebuild of a library. I tried the following ways to include a pre-build
of a static library (with modified source/include definitions):
include $(CLEAR_VARS)
LOCAL_MODULE := foo
LOCAL_SRC_FILES := lib/android/$(TARGET_ARCH_ABI)/libfoo.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_STATIC_LIBRARY)
1st Prebuild definition in source Android.mk file
2nd Call import-module mechanism and add Prebuild Android.mk file to prebuild-lib
3rd Prebuild definition in root Android.mk file
[Edit:] Here is the snipped of the call-import test which also fail:
$(info "[INFO] Source Makefile invoked")
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := bar
LOCAL_C_INCLUDES:= D:/binrev/repository/bar/include
LOCAL_SRC_FILES := bar.cpp
ifeq (debug,"debug")
MY_LOCAL_CFLAGS := -DDEBUG
endif
ifeq (false,true)
LOCAL_ARM_MODE := arm
endif
LOCAL_EXPORT_C_INCLUDES := D:/binrev/repository/bar/include
LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += -landroid
LOCAL_STATIC_LIBRARIES += foo
ifeq (ON, ON)
include $(BUILD_SHARED_LIBRARY)
else
include $(BUILD_STATIC_LIBRARY)
endif
$(call import-module, external-deps/foo)
In each case the Script with the prebuild-definition is invoked, but the prebuild
is not performed. When my NDK build has been compleded, the prebuild library and
objects are not copied to my obj folder. It seems to me that the prebuild is
completely ignored. But the path to prebuild sources are correct, otherwise the
compile fails with missing file error.
You could get the complete source of this test implementation here:
[Test projects][1]https://sourceforge.net/projects/binrevengine/files/publications/
Hint: The bar project is the project which tries to prebuild the foo project.
The foo project contains the prebuild sources.
The added tests projects could be build by your own using MinGW64 with GCC 4.7/4.8 in handshake with CMake and pre installed NDK (using r8e).
I completly get lost and running out of ideas ...
Thanks for any help.
The Android build system will not build a static library without it being used by a shared library. Just create a dummy shared library that has your static library as a dependency and voila:
include $(CLEAR_VARS)
LOCAL_MODULE := dummy
LOCAL_PATH := $(LOCAL_PATH)
LOCAL_SRC_FILES := dummy.c
LOCAL_STATIC_LIBRARIES := foo
include $(BUILD_SHARED_LIBRARY)
To exclude possible sources of defects I've reduced the Android make file to simplest case without using CMake generator of those files:
LOCAL_PATH := D:/binrev/repository/bar
include $(CLEAR_VARS)
LOCAL_MODULE := foo-prebuilt
LOCAL_SRC_FILES := external-deps/foo/lib/android/$(TARGET_ARCH_ABI)/libfoo.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := bar
LOCAL_C_INCLUDES:= D:/binrev/repository/bar/include
LOCAL_C_INCLUDES+= D:/binrev/repository/bar/external-deps/foo/include
LOCAL_SRC_FILES := src/bar.cpp
LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += -landroid
LOCAL_SHARED_LIBRARIES := foo-prebuilt
include $(BUILD_SHARED_LIBRARY)
and:
LOCAL_PATH := D:/binrev/repository/foo
include $(CLEAR_VARS)
LOCAL_MODULE := foo
LOCAL_C_INCLUDES:= D:/binrev/repository/foo/include
LOCAL_SRC_FILES := src/foo.cpp
LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += -landroid
include $(BUILD_STATIC_LIBRARY)
The failure still exists. The prebuild of the foo library is not executed. I also excluded MinGW64 as possible source of defect, if I try to build the project with Windows command line it results in same issue. The shared library is build, but the prebuild is not executed.
I checked my sources and scripts multiple times, but can't find any failure.
Any ideas what could be wrong or missing?
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 <= <NDK>/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 script that lets you build a modern version of boost for android, or simply download prebuilt boost binaries.
Also included is a sample test app that shows you how to include/link the boost headers/binaries
As specified in this answer, I downloaded libjpeg 8d from github and placed it in a folder {ANDROID_APP}/jni/libjpeg. This library has it's own Android.mk, so I tried to include it at the end of my {ANDROID_APP}/jni/Android.mk this way :
include $(LOCAL_PATH)/libjpeg/Android.mk
Note : I'm using the latest version of android NDK (r8c)
After running ndk-build, I still get this error :
ANDROID_APP/jni/libfoo/foo_analysis.c:36:21: fatal error: jpeglib.h: No such file or directory
This is the structure of my global Android.mk :
LOCAL_PATH := $(call my-dir)
# libFoo
include $(CLEAR_VARS)
LOCAL_MODULE := libfoo
LOCAL_MODULE_FILENAME := libfoo
LOCAL_SRC_FILES := libfoo/foo.c libfoo/foo_analysis.c libfoo/foo_extract.c
LOCAL_STATIC_LIBRARIES := libbmp # declared previously but not shown in this example
LOCAL_CFLAGS = ${FLAGS}
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/libfoo
LOCAL_EXPORT_LDLIBS := -llog
include $(BUILD_STATIC_LIBRARY)
# libBar
include $(CLEAR_VARS)
LOCAL_MODULE := libbar
LOCAL_MODULE_FILENAME := libbar
LOCAL_SRC_FILES := bar/bar.c
LOCAL_STATIC_LIBRARIES := libfoo
LOCAL_CFLAGS = ${FLAGS}
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/bar
LOCAL_EXPORT_LDLIBS := -llog
include $(BUILD_STATIC_LIBRARY)
# callbar
LOCAL_MODULE := libcallbar
LOCAL_MODULE_FILENAME := libcallbar
LOCAL_SRC_FILES := com_androidapp_nativeC_callbar.c
LOCAL_STATIC_LIBRARIES := libbar
LOCAL_CFLAGS = ${FLAGS}
include $(BUILD_SHARED_LIBRARY)
#libjpeg
include $(LOCAL_PATH)/libjpeg/Android.mk
I tried to use LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/libfoo $(LOCAL_PATH)/libjpeg
and LOCAL_C_INCLUDES := $(LOCAL_PATH)/libjpeg in the libFoo module, but I still get the same error.
Just looked at Android.mk in jpeg8d-master folder and seems to be it has nothing.
I was trying to compile library directly according to STANDALONE-TOOLCHAIN.HTML
I do next: $export NDKROOT=/home/alex/tools/android-ndk-r8c (where is your NDK) $export SYSROOT=$NDKROOT/platforms/android-9/arch-arm (or any other android platform)
but files from jpeg8d-master have windows \r symbols and I deleted config.guess, config.sub, depcomp than use $automake -a command. And replace ltmain.sh from glib-2.34.0
than $./configure CC="$NDKROOT/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc --sysroot=$SYSROOT" --host=arm-linux-androideabi $make
next try prebuilts feature NDK - How to use a generated .so library in another project and NDK/PREBUILTS.HTML
I have three static libraries from a framework that I want to use in my project. These libraries are called libtinySAK_armv7-a.a, libtinyNET_armv7-a.a and libtinyHTTP_armv7-a.a. I have placed them in the same folder as the Android.mkandApplication.mk.
My native code is dependent on them so I want to include them in my shared library.
From what I've read on stackoverflow and google'd I believe the android.mk is supposed to look something like this:
# TINYSAK
include $(CLEAR_VARS)
LOCAL_MODULE := tinySAK
LOCAL_SRC_FILES := libtinySAK_armv7-a.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../doubango/tinySAK/src/
include $(PREBUILT_STATIC_LIBRARY)
# TINYNET
include $(CLEAR_VARS)
LOCAL_MODULE := tinyNET
LOCAL_SRC_FILES := libtinyNET_armv7-a.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../doubango/tinyNET/src/
include $(PREBUILT_STATIC_LIBRARY)
# TINYHTTP
include $(CLEAR_VARS)
LOCAL_MODULE := tinyHTTP
LOCAL_SRC_FILES := libtinyHTTP_armv7-a.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../doubango/tinyHTTP/include/
include $(PREBUILT_STATIC_LIBRARY)
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := libtest
LOCAL_SRC_FILES := \
../../test/stack.cpp \
../../test/main.cpp
LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/../../test/include/ \
$(LOCAL_PATH)/../../../doubango/tinyHTTP/include/ \
$(LOCAL_PATH)/../../../doubango/tinySAK/src/ \
$(LOCAL_PATH)/../../../doubango/tinyNET/src/
LOCAL_STATIC_LIBRARIES := \
tinySAK \
tinyNET \
tinyHTTP
include $(BUILD_SHARED_LIBRARY)
My Application.mk:
APP_STL := stlport_static
APP_ABI := armeabi-v7a
The error I get upon compilation("ndk-build" from project dir) is
jni/Android.mk:tinySAK: LOCAL_SRC_FILES points to a missing file
And I suppose the other 2 libraries also fail. Why cannot it find them?
Besides that, is there any other errors I've made in the makefile?
Thanks
Nevermind, I solved it.
I declared the "LOCAL_PATH" in the beginning of the make-file only. Otherwise it would look for the libs in the ndk-folders.
Try LOCAL_LDLIBS instead of LOCAL_SRC_FILES.