[转]android下编译libusb和libhackrf

libhackrf是上层应用程序操作hackrf的入口库，是软件操作硬件的中间件，在android上使用hackrf当然也需要使用 libhackrf。操作系统与hackrf之间的通信是通过USB2.0完成的，libhackrf使用了libusb进行USB通信。android 并没有自带libusb，所以我们需要自行编译。

        整体分为两个部分，首先是libusb的编译，然后是libhackrf的编译。

libusb

        libusb的编译十分简单，因为其没有过多的依赖，而麻烦的是android对usb权限的控制，解决权限问题有两种方法，第一种是改造 libusb，并在android应用层获取usb的权限将usb的信息传到libusb。第二种是通过修改系统权限列表，使得当前程序在系统usb用户 组中。我这里为了更少的更改libusb和libhackrf文件，就选用了第二种方法。以下为libusb的编译步骤

1）确保NDK安装成功，可通过在cmd中运行ndk-build --version查看信息。

C:UsersXXXX>ndk-build --version
GNU Make 3.81
Copyright (C) 2006  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

This program built for i586-pc-mingw32

2）下载libusb，可以到www.libusb.org下载。

3）加压libusb后在源码根目录创建android文件夹和相应文件。

|- libusb-master

|- android

|- jni

|- Android.mk

|- Application.mk

|- examples.mk

|- libusb.mk

|- tests.mk

|- libs

|- obj

|- config.h

|- libusb

...
文件如下:

config.h

/* Start with debug message logging enabled */
/* #undef ENABLE_DEBUG_LOGGING */

/* Message logging */
#define ENABLE_LOGGING

/* Define to 1 if you have the <dlfcn.h> header file. */
#define HAVE_DLFCN_H 1

/* Define to 1 if you have the `gettimeofday' function. */
#define HAVE_GETTIMEOFDAY 1

/* Define to 1 if you have the <inttypes.h> header file. */
#define HAVE_INTTYPES_H 1

/* Linux backend */
#define OS_LINUX 1

/* Enable output to system log */
#define USE_SYSTEM_LOGGING_FACILITY 1

/* type of second poll() argument */
#define POLL_NFDS_TYPE nfds_t

/* Use POSIX Threads */
#define THREADS_POSIX 1

/* Default visibility */
#define DEFAULT_VISIBILITY __attribute__((visibility("default")))

/* Define to 1 if you have the <memory.h> header file. */
#define HAVE_MEMORY_H 1

/* Define to 1 if you have the <poll.h> header file. */
#define HAVE_POLL_H 1

/* Define to 1 if you have the <signal.h> header file. */
#define HAVE_SIGNAL_H 1

/* Define to 1 if you have the <sys/stat.h> header file. */
#define HAVE_SYS_STAT_H 1

/* Define to 1 if you have the <sys/time.h> header file. */
#define HAVE_SYS_TIME_H 1

/* Define to 1 if you have the <sys/types.h> header file. */
#define HAVE_SYS_TYPES_H 1

/* Define to 1 if you have the <unistd.h> header file. */
#define HAVE_UNISTD_H 1

/* Define to 1 if you have the <linux/filter.h> header file. */
#define HAVE_LINUX_FILTER_H 1

/* Define to 1 if you have the <linux/netlink.h> header file. */
#define HAVE_LINUX_NETLINK_H 1

/* Define to 1 if you have the <asm/types.h> header file. */
#define HAVE_ASM_TYPES_H 1

/* Define to 1 if you have the <sys/socket.h> header file. */
#define HAVE_SYS_SOCKET_H 1

Android.mk

LOCAL_PATH:= $(call my-dir)

include $(LOCAL_PATH)/libusb.mk
include $(LOCAL_PATH)/examples.mk
include $(LOCAL_PATH)/tests.mk

Application.mk

APP_ABI := all

APP_LDFLAGS := -llog

examples.mk

# Android build config for libusb examples
# Copyright © 2012-2013 RealVNC Ltd. <toby.gray@realvnc.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#

LOCAL_PATH:= $(call my-dir)
LIBUSB_ROOT_REL:= ../..
LIBUSB_ROOT_ABS:= $(LOCAL_PATH)/../..

# listdevs

include $(CLEAR_VARS)

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/examples/listdevs.c

LOCAL_C_INCLUDES +=
  $(LIBUSB_ROOT_ABS)

LOCAL_SHARED_LIBRARIES += libusb1.0

LOCAL_MODULE:= listdevs

include $(BUILD_EXECUTABLE)

# xusb

include $(CLEAR_VARS)

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/examples/xusb.c

LOCAL_C_INCLUDES +=
  $(LIBUSB_ROOT_ABS)

LOCAL_SHARED_LIBRARIES += libusb1.0

LOCAL_MODULE:= xusb

include $(BUILD_EXECUTABLE)

# hotplugtest

include $(CLEAR_VARS)

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/examples/hotplugtest.c

LOCAL_C_INCLUDES +=
  $(LIBUSB_ROOT_ABS)

LOCAL_SHARED_LIBRARIES += libusb1.0

LOCAL_MODULE:= hotplugtest

include $(BUILD_EXECUTABLE)

# fxload

include $(CLEAR_VARS)

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/examples/fxload.c
  $(LIBUSB_ROOT_REL)/examples/ezusb.c

LOCAL_C_INCLUDES +=
  $(LIBUSB_ROOT_ABS)

LOCAL_SHARED_LIBRARIES += libusb1.0

LOCAL_MODULE:= fxload

include $(BUILD_EXECUTABLE)

# sam3u_benchmake

include $(CLEAR_VARS)

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/examples/sam3u_benchmark.c

LOCAL_C_INCLUDES +=
  $(LIBUSB_ROOT_ABS)

LOCAL_SHARED_LIBRARIES += libusb1.0

LOCAL_MODULE:= sam3u_benchmark

include $(BUILD_EXECUTABLE)

# dpfp

include $(CLEAR_VARS)

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/examples/dpfp.c

LOCAL_C_INCLUDES +=
  $(LIBUSB_ROOT_ABS)

LOCAL_SHARED_LIBRARIES += libusb1.0

LOCAL_MODULE:= dpfp

include $(BUILD_EXECUTABLE)

# dpfp_threaded

include $(CLEAR_VARS)

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/examples/dpfp_threaded.c

LOCAL_C_INCLUDES +=
  $(LIBUSB_ROOT_ABS)

LOCAL_SHARED_LIBRARIES += libusb1.0

LOCAL_MODULE:= dpfp_threaded

include $(BUILD_EXECUTABLE)

libusb.mk

# Android build config for libusb
# Copyright © 2012-2013 RealVNC Ltd. <toby.gray@realvnc.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#

LOCAL_PATH:= $(call my-dir)
LIBUSB_ROOT_REL:= ../..
LIBUSB_ROOT_ABS:= $(LOCAL_PATH)/../..

# libusb

include $(CLEAR_VARS)

LIBUSB_ROOT_REL:= ../..
LIBUSB_ROOT_ABS:= $(LOCAL_PATH)/../..

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/libusb/core.c
  $(LIBUSB_ROOT_REL)/libusb/descriptor.c
  $(LIBUSB_ROOT_REL)/libusb/hotplug.c
  $(LIBUSB_ROOT_REL)/libusb/io.c
  $(LIBUSB_ROOT_REL)/libusb/sync.c
  $(LIBUSB_ROOT_REL)/libusb/strerror.c
  $(LIBUSB_ROOT_REL)/libusb/os/linux_usbfs.c
  $(LIBUSB_ROOT_REL)/libusb/os/poll_posix.c
  $(LIBUSB_ROOT_REL)/libusb/os/threads_posix.c
  $(LIBUSB_ROOT_REL)/libusb/os/linux_netlink.c

LOCAL_C_INCLUDES +=
  $(LOCAL_PATH)/..
  $(LIBUSB_ROOT_ABS)/libusb
  $(LIBUSB_ROOT_ABS)/libusb/os

LOCAL_EXPORT_C_INCLUDES :=
  $(LIBUSB_ROOT_ABS)/libusb

LOCAL_LDLIBS := -llog

LOCAL_MODULE := libusb1.0

include $(BUILD_SHARED_LIBRARY)

tests.mk

# Android build config for libusb tests
# Copyright © 2012-2013 RealVNC Ltd. <toby.gray@realvnc.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#

LOCAL_PATH:= $(call my-dir)
LIBUSB_ROOT_REL:= ../..
LIBUSB_ROOT_ABS:= $(LOCAL_PATH)/../..

# testlib

include $(CLEAR_VARS)

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/tests/testlib.c

LOCAL_C_INCLUDES +=
  $(LIBUSB_ROOT_ABS)/tests

LOCAL_EXPORT_C_INCLUDES :=
  $(LIBUSB_ROOT_ABS)/tests

LOCAL_MODULE := testlib

include $(BUILD_STATIC_LIBRARY)


# stress

include $(CLEAR_VARS)

LOCAL_SRC_FILES :=
  $(LIBUSB_ROOT_REL)/tests/stress.c

LOCAL_C_INCLUDES +=
  $(LIBUSB_ROOT_ABS)

LOCAL_SHARED_LIBRARIES += libusb1.0
LOCAL_STATIC_LIBRARIES += testlib

LOCAL_MODULE:= stress

include $(BUILD_EXECUTABLE)

4）切换到android目录，使用ndk-build进行编译

编译完成之后，可以在libs文件夹下看到不同平台的lib和可执行文件，拷贝即可使用。

libhackrf

libhackrf的编译，可以参照libusb的编译。在hackrf-masterhostlibhackrfsrc下创建如下结构

|- android/
|- jni/
|- Android.mk
|- Application.mk
|- libhackrf.mk
|- libs/
|- obj/

Android.mk

LOCAL_PATH:= $(call my-dir)

include $(LOCAL_PATH)/libhackrf.mk
include $(LOCAL_PATH)/../../libusb/Android.mk

Application.mk

APP_ABI := armeabi armeabi-v7a

APP_LDFLAGS := -llog

libhackrf.mk

# Android build config for libhackrf
# Copyright © 2014 <pagekpang@gmail.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#

LOCAL_PATH:= $(call my-dir)
LIBUSB_ROOT_REL:= ../..
LIBUSB_ROOT_ABS:= $(LOCAL_PATH)/../..

# libhackrf
#D:devandroid-ndk-r9d
dk-build


include $(CLEAR_VARS)

LOCAL_SRC_FILES := $(LIBUSB_ROOT_REL)/hackrf.c

LOCAL_C_INCLUDES += $(LIBUSB_ROOT_ABS)/
                    $(LIBUSB_ROOT_ABS)/libusb/

LOCAL_LDLIBS := -llog

LOCAL_MODULE := libhackrf

LOCAL_SHARED_LIBRARIES += libusb1.0

include $(BUILD_SHARED_LIBRARY)

4）切换到android目录，使用ndk-build进行编译

总体编译完成后，即可得到libhackrf.so和libusb.so以及对映的头文件，可以拷贝到android中使用。