Gcc 链接可执行文件时查找共享库依赖项

我正试图在Ubuntu12.04（32位）构建系统上为ARM主机交叉编译gstreamer。我将要描述的一切都不会发生在i686 linux gnu GCC上。我正在Ubuntu 12.04上使用以下gcc进行编译：

> arm-linux-gnueabihf-gcc -v
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabihf-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/4.6/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5'
--with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6
--enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/arm-linux-gnueabihf/include/c++/4.6.3 --libdir=/usr/lib
--enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-gnu-unique-object --enable-plugin --enable-objc-gc --enable-multilib
--disable-sjlj-exceptions --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16
--with-mode=thumb --disable-werror --enable-checking=release --build=i686-linux-gnu
--host=i686-linux-gnu --target=arm-linux-gnueabihf --program-prefix=arm-linux-gnueabihf-
--includedir=/usr/arm-linux-gnueabihf/include
--with-headers=/usr/arm-linux-gnueabihf/include
--with-libs=/usr/arm-linux-gnueabihf/lib
Thread model: posix
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)

而这个劳工处：

armlinux gnueabihf ld-v GNULD（Ubuntu的GNUBinutils）2.22

GCC是从默认的Ubuntu 12.04 PPAs安装的。当构建系统开始链接gst-discoverer-1.0可执行文件时，我得到以下错误：

/usr/lib/gcc/arm-linux-gnueabihf/4.6/../../../../arm-linux-gnueabihf/bin/ld: warning: liborc-0.4.so.0, needed by ../gst-libs/gst/video/.libs/libgstvideo-1.0.so, not found (try using -rpath or -rpath-link)
../gst-libs/gst/video/.libs/libgstvideo-1.0.so: undefined reference to `orc_program_compile'
../gst-libs/gst/video/.libs/libgstvideo-1.0.so: undefined reference to `orc_program_set_backup_function'
../gst-libs/gst/video/.libs/libgstvideo-1.0.so: undefined reference to `orc_program_new_from_static_bytecode'
../gst-libs/gst/video/.libs/libgstvideo-1.0.so: undefined reference to `orc_program_free'
../gst-libs/gst/video/.libs/libgstvideo-1.0.so: undefined reference to `orc_once_mutex_lock'
../gst-libs/gst/video/.libs/libgstvideo-1.0.so: undefined reference to `orc_program_take_code'
../gst-libs/gst/video/.libs/libgstvideo-1.0.so: undefined reference to `orc_once_mutex_unlock'
collect2: ld returned 1 exit status

gst-discoverer-1.0取决于libgstvideo-1.0.so。libgstvideo-1.0.so（在该过程的早期成功构建）依赖于liborc-0.4.so。使用arm linux gnueabihf readelf-a检查libgstvideo-1.0.so时会产生以下代码片段：

Dynamic section at offset 0x29ed8 contains 33 entries:
  Tag        Type                         Name/Value
 0x00000001 (NEEDED)                     Shared library: [libgstbase-1.0.so.0]
 0x00000001 (NEEDED)                     Shared library: [libgstreamer-1.0.so.0]
 0x00000001 (NEEDED)                     Shared library: [libgobject-2.0.so.0]
 0x00000001 (NEEDED)                     Shared library: [libglib-2.0.so.0]
 0x00000001 (NEEDED)                     Shared library: [liborc-0.4.so.0]
 0x00000001 (NEEDED)                     Shared library: [libgcc_s.so.1]
 0x00000001 (NEEDED)                     Shared library: [libpthread.so.0]
 0x00000001 (NEEDED)                     Shared library: [libc.so.6]
 0x0000000e (SONAME)                     Library soname: [libgstvideo-1.0.so.0]
 0x0000000f (RPATH)                      Library rpath: [/home/test/gst/gstreamer/gstreamer/libs/gst/base/.libs:/
home/test/gst/gstreamer/gstreamer/gst/.libs:/home/test/gst/gstreamer/orc/orc/.libs]

---

RPATH条目中liborc-0.4.so的路径是正确的。gst-discoverer-1.0的链接行不包含对liborc的引用，因为它不直接依赖它（仅通过libgstvideo-1.0.so间接依赖）。我尝试将“-rpath link=/home/test/gst/gstreamer/orc/orc/.libs”添加到我的LDFLAGS中，但没有成功。关于为什么交叉编译链接器无法找到此共享库的依赖项，您有什么想法吗？

看来我的思路是正确的，但我将-rpath链接传递给了ld（在配置行中使用LDFLAGS）。因为实际上是gcc在进行链接，所以我需要使用CFLAGS和-Wl参数，如下所示：

./configure CFLAGS="-Wl,-rpath=/home/test/gst/gstreamer/orc/orc/libs"

，则交叉链接器中可能存在错误