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
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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：