问题
I'm trying to compile libnice (v0.18 to be specific) for Android, but have run into some troubles. How can I compile libnice for Android? I have listed my attempts so far below.
1st Attempt
My first try was using a custom Android.mk makefile but I got an error stating AI_NUMERICHOST undeclared (adding #include <netdb.h> did not resolve this and I'm out of ideas here). See my Android.mk below
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := glib
LOCAL_SRC_FILES := lib/libglib-2.0.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := gobject
LOCAL_SRC_FILES := lib/libgobject-2.0.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := gmodule
LOCAL_SRC_FILES := lib/libgmodule-2.0.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := gio
LOCAL_SRC_FILES := lib/libgio-2.0.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := gthread
LOCAL_SRC_FILES := lib/libgthread-2.0.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := ffi
LOCAL_SRC_FILES := lib/libffi.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := iconv
LOCAL_SRC_FILES := lib/libiconv.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := intl
LOCAL_SRC_FILES := lib/libintl.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := xml2
LOCAL_SRC_FILES := lib/libxml2.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := z
LOCAL_SRC_FILES := lib/libz.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
NICE := libnice-0.1.8
LOCAL_MODULE := ice_jni
LOCAL_LDLIBS := -llog
LOCAL_STATIC_LIBRARIES := glib gobject gmodule gio gthread ffi iconv intl xml2 z
NICE_INCLUDES := $(LOCAL_PATH)/include \
$(LOCAL_PATH)/lib/glib-2.0/include \
$(LOCAL_PATH)/lib/libffi-3.0.13/include \
$(wildcard $(LOCAL_PATH)/include/*) \
$(LOCAL_PATH)/$(NICE)/nice \
$(LOCAL_PATH)/$(NICE)/agent \
$(LOCAL_PATH)/$(NICE)/random \
$(LOCAL_PATH)/$(NICE)/socket \
$(LOCAL_PATH)/$(NICE)/stun
NICE_SRC := $(patsubst $(LOCAL_PATH)/%, %, $(wildcard $(LOCAL_PATH)/$(NICE)/agent/*.c)) \
$(patsubst $(LOCAL_PATH)/%, %, $(wildcard $(LOCAL_PATH)/$(NICE)/random/*.c)) \
$(patsubst $(LOCAL_PATH)/%, %, $(wildcard $(LOCAL_PATH)/$(NICE)/socket/*.c)) \
$(patsubst $(LOCAL_PATH)/%, %, $(wildcard $(LOCAL_PATH)/$(NICE)/stun/*.c))
LOCAL_C_INCLUDES := $(LOCAL_PATH) \
$(NICE_INCLUDES)
LOCAL_SRC_FILES := ICE.cpp \
$(NICE_SRC)
include $(BUILD_SHARED_LIBRARY)
The static libraries are copied over from the gstreamer 1.4.1 debug version and are selected in accordance with the guide mentioned below.
2nd Attempt
I then tried to compile a static library referring to this guide, which is again causing trouble:
export PKG_CONFIG_PATH=`pwd`/../gstreamer/lib/pkgconfig
export CFLAGS="--sysroot=`pwd`/../toolchain/sysroot"
./configure --prefix=`pwd`/../build --host=arm-linux-androideabi
This results in the error below. Adding -mthumb or -marm to CFLAGS yields a C compiler cannot create executables error during configure.
stunagent.c: Assembler messages:
stunagent.c:160: Error: no such instruction: `rev %eax,%eax'
stunagent.c:676: Error: no such instruction: `rev16 %ax,%ax'
The mentioned lines do not contain ASM but calls to htons and ntohl, so I guess I did something wrong...
I used make_standalone_toolchain from the NDK using various Android versions to create the toolchain.
Can anybody help? Thanks in advance! ~
回答1:
FINALLY! This took me way too long. The problem was that libnice creates a config.h file during configure which defines some macros (HAVE_NETDB_H among others). Although I was not able to compile libnice with my toolchain I was able to generate a valid config.h which I could use. After this I had to make some additional adjustments to my Android.mk. I'll post both files below for others in search of answers.
(Note: you still need glib. As my project uses gstreamer I was able to use the shared library created by the gstreamer build script which contains glib.)
Cheers!
========================
Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
NICE := libnice-0.1.8
LOCAL_MODULE := nice_jni
LOCAL_LDLIBS := -llog
LOCAL_SHARED_LIBRARIES := gstreamer_android
LOCAL_CFLAGS += -DHAVE_CONFIG_H
NICE_DIRS := $(LOCAL_PATH)/$(NICE)/ \
$(LOCAL_PATH)/$(NICE)/agent/ \
$(LOCAL_PATH)/$(NICE)/nice/ \
$(LOCAL_PATH)/$(NICE)/random/ \
$(LOCAL_PATH)/$(NICE)/socket/ \
$(LOCAL_PATH)/$(NICE)/stun/ \
$(LOCAL_PATH)/$(NICE)/stun/usages/
# $(LOCAL_PATH)/$(NICE)/stun/tools/ \
NICE_INCLUDES := $(NICE_DIRS)
NICE_SRC := $(filter-out %test.c, $(foreach dir, $(NICE_DIRS), $(patsubst $(LOCAL_PATH)/%, %, $(wildcard $(addsuffix *.c, $(dir)))) ))
LOCAL_C_INCLUDES := $(NICE_INCLUDES) #add your own headers if needed
LOCAL_SRC_FILES := [YOUR_SRC_FILES] \
$(NICE_SRC)
include $(BUILD_SHARED_LIBRARY)
config.h
(This should not differ across platforms and Android versions. I left the comments in it intentionally for future reference)
/* config.h. Generated from config.h.in by configure. */
/* config.h.in. Generated from configure.ac by autoheader. */
/* Define to 1 if you have the <arpa/inet.h> header file. */
#define HAVE_ARPA_INET_H 1
/* Define to 1 if C supports variable-length arrays. */
#define HAVE_C_VARARRAYS 1
/* Define to 1 if you have the <dlfcn.h> header file. */
#define HAVE_DLFCN_H 1
/* Whether getifaddrs() is available on the system */
/* #undef HAVE_GETIFADDRS */
/* Have the GUPnP IGD library */
/* #undef HAVE_GUPNP */
/* Define to 1 if you have the <ifaddrs.h> header file. */
/* #undef HAVE_IFADDRS_H */
/* Define to 1 if you have the <inttypes.h> header file. */
#define HAVE_INTTYPES_H 1
/* Define to 1 if you have the <memory.h> header file. */
#define HAVE_MEMORY_H 1
/* Define to 1 if you have the <netdb.h> header file. */
#define HAVE_NETDB_H 1
/* Define to 1 if you have the <net/in.h> header file. */
/* #undef HAVE_NET_IN_H */
/* Define to 1 if you have the `poll' function. */
#define HAVE_POLL 1
/* Define to 1 if the system has the type `size_t'. */
#define HAVE_SIZE_T 1
/* Define to 1 if the system has the type `ssize_t'. */
#define HAVE_SSIZE_T 1
/* Define to 1 if stdbool.h conforms to C99. */
#define HAVE_STDBOOL_H 1
/* Define to 1 if you have the <stdint.h> header file. */
#define HAVE_STDINT_H 1
/* Define to 1 if you have the <stdlib.h> header file. */
#define HAVE_STDLIB_H 1
/* Define to 1 if you have the <strings.h> header file. */
#define HAVE_STRINGS_H 1
/* Define to 1 if you have the <string.h> header file. */
#define HAVE_STRING_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/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 the system has the type `_Bool'. */
#define HAVE__BOOL 1
/* Define to the sub-directory in which libtool stores uninstalled libraries.
*/
#define LT_OBJDIR ".libs/"
/* Define to 1 if assertions should be disabled. */
/* #undef NDEBUG */
/* Public library function implementation */
#define NICEAPI_EXPORT
/* Name of package */
#define PACKAGE "libnice"
/* Define to the address where bug reports for this package should be sent. */
#define PACKAGE_BUGREPORT ""
/* Define to the full name of this package. */
#define PACKAGE_NAME "libnice"
/* Define to the full name and version of this package. */
#define PACKAGE_STRING "libnice 0.1.8"
/* Define to the one symbol short name of this package. */
#define PACKAGE_TARNAME "libnice"
/* Define to the home page for this package. */
#define PACKAGE_URL ""
/* Define to the version of this package. */
#define PACKAGE_VERSION "0.1.8"
/* Define to 1 if you have the ANSI C header files. */
#define STDC_HEADERS 1
/* Enable extensions on AIX 3, Interix. */
#ifndef _ALL_SOURCE
# define _ALL_SOURCE 1
#endif
/* Enable GNU extensions on systems that have them. */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
#endif
/* Enable threading extensions on Solaris. */
#ifndef _POSIX_PTHREAD_SEMANTICS
# define _POSIX_PTHREAD_SEMANTICS 1
#endif
/* Enable extensions on HP NonStop. */
#ifndef _TANDEM_SOURCE
# define _TANDEM_SOURCE 1
#endif
/* Enable general extensions on Solaris. */
#ifndef __EXTENSIONS__
# define __EXTENSIONS__ 1
#endif
/* Version number of package */
#define VERSION "0.1.8"
/* Define to `2' to get GNU/libc warnings. */
/* Only define if -O1 or more is enabled */
#if defined __OPTIMIZE__ && __OPTIMIZE__ > 0
# define _FORTIFY_SOURCE 2
#endif
/* Define to 1 if on MINIX. */
/* #undef _MINIX */
/* Define to 2 if the system does not provide POSIX.1 features except with
this defined. */
/* #undef _POSIX_1_SOURCE */
/* Define to 1 if you need to in order for `stat' and other things to work. */
/* #undef _POSIX_SOURCE */
/* Needed to get declarations for msg_control and msg_controllen on Solaris */
/* #undef _XOPEN_SOURCE */
/* Needed to get declarations for msg_control and msg_controllen on Solaris */
#define __EXTENSIONS__ 1
/* Define to the equivalent of the C99 'restrict' keyword, or to
nothing if this is not supported. Do not define if restrict is
supported directly. */
#define restrict __restrict
/* Work around a bug in Sun C++: it does not support _Restrict or
__restrict__, even though the corresponding Sun C compiler ends up with
"#define restrict _Restrict" or "#define restrict __restrict__" in the
previous line. Perhaps some future version of Sun C++ will work with
restrict; if so, hopefully it defines __RESTRICT like Sun C does. */
#if defined __SUNPRO_CC && !defined __RESTRICT
# define _Restrict
# define __restrict__
#endif
来源：https://stackoverflow.com/questions/26485507/compiling-libnice-for-android