交叉编译gstreamer-0.10.24

最近要在arm平台上使用gstreamer，于是开始了gstreamer的交叉编译。实现交叉编译有两种方式：

1. 在pc平台编译，利用ubuntu平台上的arm-linux-系列工具进行编译，此方式编译速度快，但是configure的交叉配置项设置很麻烦

2. 在目标平台编译，直接在目标板上用目标gcc工具进行编译，此方式编译速度慢，但是configure配置很简单，和pc机上的configure配置基本一样。

 

下面为pc平台的编译，还有错误

$GLIB_CFLAGS="-I/home/soeasy/nfsroot/target/usr/include/glib-2.0 -I/home/soeasy/nfsroot/target/usr/lib/glib-2.0/include" GLIB_LIBS="-L/home/soeasy/nfsroot/target/usr/lib/" XML_CFLAGS="-I/home/soeasy/nfsroot/target/usr/include/libxml2 "  GLIB_ONLY_CFLAGS=" -I/home/soeasy/nfsroot/target/usr/include/glib-2.0 -I/home/soeasy/nfsroot/target/usr/lib/glib-2.0/include  " ./configure --host=arm-linux --disable-nls --disable-static --disable-loadsave --with-html-dir=/tmp/dump --prefix=/home/soeasy/nfsroot/gstreamer/install LDFLAGS="-Wl,-rpath-link,/home/soeasy/nfsroot/target -lglib-2.0  -lgobject-2.0 -lgthread-2.0 -lgmodule-2.0 -lxml2 " CFLAGS="-I/home/soeasy/nfsroot/target/usr/include -I/home/soeasy/nfsroot/target/usr/include/glib-2.0 -I/home/soeasy/nfsroot/target/usr/lib/glib-2.0/include"

链接是提示下列错误：

arm-linux-gcc -shared  .libs/libgstreamer_0.10_la-glib-compat.o /
.libs/libgstreamer_0.10_la-gst.o .libs/libgstreamer_0.10_la-gstobject.o .libs/libgstreamer_0.10_la-gstbin.o /
.libs/libgstreamer_0.10_la-gstbuffer.o .libs/libgstreamer_0.10_la-gstbus.o .libs/libgstreamer_0.10_la-gstcaps.o /
.libs/libgstreamer_0.10_la-gstchildproxy.o .libs/libgstreamer_0.10_la-gstclock.o .libs/libgstreamer_0.10_la-gstelement.o /
.libs/libgstreamer_0.10_la-gstelementfactory.o .libs/libgstreamer_0.10_la-gsterror.o .libs/libgstreamer_0.10_la-gstevent.o /
.libs/libgstreamer_0.10_la-gstfilter.o .libs/libgstreamer_0.10_la-gstformat.o .libs/libgstreamer_0.10_la-gstghostpad.o /
.libs/libgstreamer_0.10_la-gstindex.o .libs/libgstreamer_0.10_la-gstindexfactory.o .libs/libgstreamer_0.10_la-gstinfo.o /
.libs/libgstreamer_0.10_la-gstinterface.o .libs/libgstreamer_0.10_la-gstiterator.o .libs/libgstreamer_0.10_la-gstmessage.o /
.libs/libgstreamer_0.10_la-gstminiobject.o .libs/libgstreamer_0.10_la-gstpad.o .libs/libgstreamer_0.10_la-gstpadtemplate.o /
.libs/libgstreamer_0.10_la-gstpipeline.o .libs/libgstreamer_0.10_la-gstplugin.o .libs/libgstreamer_0.10_la-gstpluginfeature.o /
.libs/libgstreamer_0.10_la-gstquery.o .libs/libgstreamer_0.10_la-gstregistry.o .libs/libgstreamer_0.10_la-gstsegment.o /
.libs/libgstreamer_0.10_la-gststructure.o .libs/libgstreamer_0.10_la-gstsystemclock.o .libs/libgstreamer_0.10_la-gsttaglist.o /
.libs/libgstreamer_0.10_la-gsttagsetter.o .libs/libgstreamer_0.10_la-gsttask.o .libs/libgstreamer_0.10_la-gsttrace.o /
.libs/libgstreamer_0.10_la-gsttypefind.o .libs/libgstreamer_0.10_la-gsttypefindfactory.o .libs/libgstreamer_0.10_la-gsturi.o /
.libs/libgstreamer_0.10_la-gstutils.o .libs/libgstreamer_0.10_la-gstvalue.o .libs/libgstreamer_0.10_la-gstparse.o /
.libs/libgstreamer_0.10_la-gstregistryxml.o .libs/libgstreamer_0.10_la-gstenumtypes.o .libs/libgstreamer_0.10_la-gstmarshal.o /
-Wl,--whole-archive parse/.libs/libgstparse.a -Wl,--no-whole-archive  -lm -lz -lpthread -ldl /
/usr/lib/libgobject-2.0.so /usr/lib/libgthread-2.0.so -lrt /usr/lib/libgmodule-2.0.so /usr/lib/libglib-2.0.so /usr/lib/libxml2.so  /
-Wl,-rpath-link -Wl,/home/soeasy/nfsroot/target -pthread -Wl,--export-dynamic -Wl,-soname -Wl,libgstreamer-0.10.so.0 /
-Wl,-version-script -Wl,.libs/libgstreamer-0.10.ver -o .libs/libgstreamer-0.10.so.0.7.0

 

/usr/lib/libgobject-2.0.so: could not read symbols: File in wrong format

 

显然需要链接的库libgobject-2.0.so没有定位到交叉库的目录，而是定位了pc机本身的i686的库，链接不成功。

根据gcc的参数说明，我在configure时指定了

LDFLAGS="-Wl,-rpath-link,/home/soeasy/nfsroot/target -lglib-2.0  -lgobject-2.0 -lgthread-2.0 -lgmodule-2.0 -lxml2 "

但是还是出错，郁闷

 

----------------------------------------------------------------------------------------------------------------------------------

继续交叉编译的工作，看来-Wl,-rpath-link,/home/soeasy/nfsroot/target是不能解决问题了，开始试试其他参数。

$LDFLAGS=" --sysroot=/home/soeasy/nfsroot/target -lglib-2.0 -lgobject-2.0 -lgthread-2.0 -lgmodule-2.0 -lxml2 " CPPFLAGS="-I/home/soeasy/nfsroot/target/usr/include -I/home/soeasy/nfsroot/target/usr/include/glib-2.0 -I/home/soeasy/nfsroot/target/usr/lib/glib-2.0/include -I/home/soeasy/nfsroot/target/usr/include/libxml2" GLIB_CFLAGS="-I/home/soeasy/nfsroot/target/usr/include/glib-2.0 -I/home/soeasy/nfsroot/target/usr/lib/glib-2.0/include" GLIB_LIBS="-L/home/soeasy/nfsroot/target/usr/lib --sysroot=/home/soeasy/nfsroot/target -lglib-2.0 -lgobject-2.0 -lgthread-2.0 -lgmodule-2.0 -lxml2" GLIB_ONLY_CFLAGS=" -I/home/soeasy/nfsroot/target/usr/include/glib-2.0 -I/home/soeasy/nfsroot/target/usr/lib/glib-2.0/include  " GLIB_ONLY_LIBS="-L/home/soeasy/nfsroot/target/usr/lib/ --sysroot=/home/soeasy/nfsroot/target -lglib-2.0 -lgobject-2.0 -lgthread-2.0 -lgmodule-2.0 -lxml2" ./configure --prefix=/install --disable-debug --disable-valgrind --host=arm-linux XML_CFLAGS="-I/home/soeasy/nfsroot/target/usr/include/libxml2"  GST_ALL_CFLAGS="-I/home/soeasy/nfsroot/target/usr/include -I/home/soeasy/nfsroot/target/usr/include/glib-2.0 -I/home/soeasy/nfsroot/target/usr/lib/glib-2.0/include -I/home/soeasy/nfsroot/target/usr/include/libxml2"

 

这次看来libgobject-2.0.so是链接成功了，但是又出现下列错误：

libtool: link:  arm-linux-gcc -shared  .libs/libgstreamer_0.10_la-gst.o .libs/libgstreamer_0.10_la-gstobject.o .libs/libgstreamer_0.10_la-gstbin.o .libs/libgstreamer_0.10_la-gstbuffer.o .libs/libgstreamer_0.10_la-gstbufferlist.o .libs/libgstreamer_0.10_la-gstbus.o .libs/libgstreamer_0.10_la-gstcaps.o .libs/libgstreamer_0.10_la-gstchildproxy.o .libs/libgstreamer_0.10_la-gstclock.o .libs/libgstreamer_0.10_la-gstdebugutils.o .libs/libgstreamer_0.10_la-gstelement.o .libs/libgstreamer_0.10_la-gstelementfactory.o .libs/libgstreamer_0.10_la-gsterror.o .libs/libgstreamer_0.10_la-gstevent.o .libs/libgstreamer_0.10_la-gstfilter.o .libs/libgstreamer_0.10_la-gstformat.o .libs/libgstreamer_0.10_la-gstghostpad.o .libs/libgstreamer_0.10_la-gstindex.o .libs/libgstreamer_0.10_la-gstindexfactory.o .libs/libgstreamer_0.10_la-gstinfo.o .libs/libgstreamer_0.10_la-gstinterface.o .libs/libgstreamer_0.10_la-gstiterator.o .libs/libgstreamer_0.10_la-gstmessage.o .libs/libgstreamer_0.10_la-gstminiobject.o .libs/libgstreamer_0.10_la-gstpad.o .libs/libgstreamer_0.10_la-gstpadtemplate.o .libs/libgstreamer_0.10_la-gstparamspecs.o .libs/libgstreamer_0.10_la-gstpipeline.o .libs/libgstreamer_0.10_la-gstplugin.o .libs/libgstreamer_0.10_la-gstpluginfeature.o .libs/libgstreamer_0.10_la-gstpoll.o .libs/libgstreamer_0.10_la-gstpreset.o .libs/libgstreamer_0.10_la-gstquark.o .libs/libgstreamer_0.10_la-gstquery.o .libs/libgstreamer_0.10_la-gstregistry.o .libs/libgstreamer_0.10_la-gstsegment.o .libs/libgstreamer_0.10_la-gststructure.o .libs/libgstreamer_0.10_la-gstsystemclock.o .libs/libgstreamer_0.10_la-gsttaglist.o .libs/libgstreamer_0.10_la-gsttagsetter.o .libs/libgstreamer_0.10_la-gsttask.o .libs/libgstreamer_0.10_la-gsttaskpool.o .libs/libgstreamer_0.10_la-gsttrace.o .libs/libgstreamer_0.10_la-gsttypefind.o .libs/libgstreamer_0.10_la-gsttypefindfactory.o .libs/libgstreamer_0.10_la-gsturi.o .libs/libgstreamer_0.10_la-gstutils.o .libs/libgstreamer_0.10_la-gstvalue.o .libs/libgstreamer_0.10_la-gstparse.o .libs/libgstreamer_0.10_la-gstregistrybinary.o .libs/libgstreamer_0.10_la-gstxml.o .libs/libgstreamer_0.10_la-gstenumtypes.o .libs/libgstreamer_0.10_la-gstmarshal.o  -Wl,--whole-archive parse/.libs/libgstparse.a -Wl,--no-whole-archive  -Wl,-rpath -Wl,/home/soeasy/nfsroot/target/usr/lib -Wl,-rpath -Wl,/home/soeasy/nfsroot/target/usr/lib -L/home/soeasy/nfsroot/target/usr/lib /home/soeasy/nfsroot/target/usr/lib/libgobject-2.0.so /home/soeasy/nfsroot/target/usr/lib/libgthread-2.0.so -lpthread -lrt /home/soeasy/nfsroot/target/usr/lib/libgmodule-2.0.so /home/soeasy/nfsroot/target/usr/lib/libglib-2.0.so /home/soeasy/nfsroot/target/usr/lib/libxml2.so -lm -lz -ldl    -Wl,-soname -Wl,libgstreamer-0.10.so.0 -Wl,-version-script -Wl,.libs/libgstreamer-0.10.ver -o .libs/libgstreamer-0.10.so.0.21.0
/opt/mv_pro_5.0/montavista/pro/devkit/arm/v5t_le/bin/../lib/gcc/armv5tl-montavista-linux-gnueabi/4.2.0/../../../../armv5tl-montavista-linux-gnueabi/bin/ld: skipping incompatible /lib/libpthread.so.0 when searching for /lib/libpthread.so.0
/opt/mv_pro_5.0/montavista/pro/devkit/arm/v5t_le/bin/../lib/gcc/armv5tl-montavista-linux-gnueabi/4.2.0/../../../../armv5tl-montavista-linux-gnueabi/bin/ld: cannot find /lib/libpthread.so.0
collect2: ld returned 1 exit status

 

看来又找到本机系统的库目录里去了。

 仔细分析最后的链接命令，原来是用libtool工具来进行的。由于所有的Makefile文件是通过config.status产生的，想想link的命令肯定在

此文件里，于是编辑config.status，查找shared，看相关的脚本。搜索到下列：

archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
archive_expsym_cmds='echo "{ global:" > $output_objdir/$libname.ver~
     cat $export_symbols | sed -e "s//(.*/)//1;/" >> $output_objdir/$libname.ver~
     echo "local: *; };" >> $output_objdir/$libname.ver~
     $CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-version-script ${wl}$output_objdir/$libname.ver -o $lib'

 

好了，动手改起来，添加上--sysroot=/home/soeasy/nfsroot/target，变成下面这样

archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags --sysroot=/home/soeasy/nfsroot/target ${wl}-soname $wl$soname -o $lib'
archive_expsym_cmds='echo "{ global:" > $output_objdir/$libname.ver~
     cat $export_symbols | sed -e "s//(.*/)//1;/" >> $output_objdir/$libname.ver~
     echo "local: *; };" >> $output_objdir/$libname.ver~
     $CC -shared $libobjs $deplibs $compiler_flags --sysroot=/home/soeasy/nfsroot/target ${wl}-soname $wl$soname ${wl}-version-script ${wl}$output_objdir/$libname.ver -o $lib'

保存后，执行

#make

一切ok

 

编译gstreamer-0.10.24时需要高版本的glib库，所以编译了glib-2.20.4，步骤如下

直接./configure --prefix=/install --host=arm-linux 出错，需要预先定义变量，利用cache file实现

$echo glib_cv_stack_grows=no >> cache.file
$echo glib_cv_uscore=no >> cache.file
$echo ac_cv_func_posix_getpwuid_r=no >> cache.file
$echo ac_cv_func_posix_getgrgid_r=no >> cache.file
$./configure --prefix=/install --host=arm-linux --cache-file=cache.file

 

编译中同样会遇到gstreamer同样的问题，修改config.status，在类似的shared命令里添加--sysroot，然后ok

 

通过测试gst代码。

 

#include <gst/gst.h>#include <glib.h>GstElement *play_bin;GstElement *pipeline;static gboolean bus_call(GstBus *bus, GstMessage *msg, gpointer data){GMainLoop *loop = (GMainLoop *) data;//这个是主循环的指针，在接受EOS消息时退出循环switch (GST_MESSAGE_TYPE(msg)){default:break;}return TRUE;}void print_version(){const gchar *nano_str;guint major, minor, micro, nano;gst_version (&major, &minor, µ, &nano);if (nano == 1) nano_str = "(CVS)";else if (nano == 2) nano_str = "(Prerelease)";else nano_str = "";g_print ("This program is linked against GStreamer %d.%d.%d %s/n", major, minor, micro, nano_str);}intmain (int argc, char *argv[]){GMainLoop *loop;GstElement *source,*decoder,*sink;//定义组件GstBus *bus;if(!g_thread_supported())g_thread_init(NULL);gst_init (&argc, &argv);print_version();loop = g_main_loop_new(NULL,FALSE);pipeline = gst_pipeline_new("audio-player");play_bin = gst_element_factory_make("playbin","play_bin");bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));g_object_set(G_OBJECT(play_bin),"uri",argv[1],NULL);gst_bus_add_watch(bus, bus_call, loop);gst_object_unref(bus);gst_bin_add_many(GST_BIN(pipeline), play_bin, NULL);g_print("Running.../n");gst_element_set_state(pipeline,GST_STATE_PLAYING);g_main_loop_run (loop);gst_element_set_state(pipeline,GST_STATE_NULL);gst_object_unref(GST_OBJECT(pipeline));return 0;}

 

$arm-linux-gcc --sysroot=/home/soeasy/nfsroot/target/ -I /home/soeasy/nfsroot/target/usr/include/gstreamer-0.10/ -I /home/soeasy/nfsroot/target/usr/include/glib-2.0/ -I /home/soeasy/nfsroot/target/usr/lib/glib-2.0/include/ -I /home/soeasy/nfsroot/target/usr/include/libxml2/  -pthread -lgstreamer-0.10 -lgobject-2.0 -lgmodule-2.0 -lgthread-2.0 -lxml2 -lglib-2.0   test-gst.c -otest