使用外部工具链别名codesourcery lite 2011在Buildroot中交叉编译库，导致...
output/host/opt/ext-toolchain/bin/../lib/gcc/arm-none-linux-gnueabi/4.6.1/../../../../arm-none-linux-gnueabi/bin/ld: cannot find -lgcc_s
collect2: ld returned 1 exit status
由于明显缺少 libgcc_s.a 库
# find . -iname "libgcc*"
./output/host/usr/arm-buildroot-linux-gnueabi/sysroot/lib/libgcc_s.so
./output/host/usr/arm-buildroot-linux-gnueabi/sysroot/lib/libgcc_s.so.1
./output/host/opt/ext-toolchain/arm-none-linux-gnueabi/libc/armv4t/lib/libgcc_s.so.1
./output/host/opt/ext-toolchain/arm-none-linux-gnueabi/libc/armv4t/lib/libgcc_s.so
./output/host/opt/ext-toolchain/arm-none-linux-gnueabi/libc/thumb2/lib/libgcc_s.so.1
./output/host/opt/ext-toolchain/arm-none-linux-gnueabi/libc/thumb2/lib/libgcc_s.so
./output/host/opt/ext-toolchain/arm-none-linux-gnueabi/libc/lib/libgcc_s.so.1
./output/host/opt/ext-toolchain/arm-none-linux-gnueabi/libc/lib/libgcc_s.so
./output/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabi/4.6.1/armv4t/libgcc.a
./output/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabi/4.6.1/armv4t/libgcc_eh.a
./output/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabi/4.6.1/plugin/libgcc
./output/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabi/4.6.1/thumb2/libgcc.a
./output/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabi/4.6.1/thumb2/libgcc_eh.a
./output/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabi/4.6.1/libgcc.a
./output/host/opt/ext-toolchain/lib/gcc/arm-none-linux-gnueabi/4.6.1/libgcc_eh.a
有没有办法绕过这个问题，但仍然使用静态链接？有 CLFAGS 或 LDFLAGS 选项可以除了 libgcc_s 之外，将所有东西都静态链接吗？
到目前为止尝试的方法（超出阅读适用部分的 ld 和 gcc 手册）：
CFLAGS="-static -static-libgcc"
CFLAGS="-static -shared-libgcc"
CFLAGS="-static -static-libgcc -Wl,-Bstatic"
CFLAGS="-static -shared-libgcc -Wl,-Bstatic"
-Wl，-lgcc_s，-Bstatic之后，我得到了大量未定义/未知符号...（-Bshared不是有效的选项，ld说）。
/home/bernhard/buildroot-2013.08/output/target/usr/lib/libgio-2.0.a(libgio_2_0_la-glocalfileinfo.o): In function `_g_local_file_info_get':
glocalfileinfo.c:(.text+0x2d90): warning: Using 'getgrgid' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/home/bernhard/buildroot-2013.08/output/target/usr/lib/libgio-2.0.a(libgio_2_0_la-glocalvfs.o): In function `g_local_vfs_parse_name':
glocalvfs.c:(.text+0x174): warning: Using 'getpwnam' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/home/bernhard/buildroot-2013.08/output/target/usr/lib/libglib-2.0.a(libglib_2_0_la-gutils.o): In function `g_get_user_database_entry':
gutils.c:(.text+0x254): warning: Using 'getpwuid' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
gutils.c:(.text+0x24c): warning: Using 'setpwent' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
gutils.c:(.text+0x25c): warning: Using 'endpwent' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
gutils.c:(.text+0xa0): warning: Using 'getpwnam_r' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
gutils.c:(.text+0xe0): warning: Using 'getpwuid_r' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/home/bernhard/buildroot-2013.08/output/target/usr/lib/libgio-2.0.a(libgio_2_0_la-gnetworkaddress.o): In function `g_network_address_parse_sockaddr':
gnetworkaddress.c:(.text+0x1ac): warning: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
<<<< SNIP >>>>
/home/bernhard/buildroot-2013.08/output/target/usr/lib/libxml2.a(xmlschemastypes.o): In function `xmlSchemaGetCanonValue':
xmlschemastypes.c:(.text+0x7680): undefined reference to `trunc'
xmlschemastypes.c:(.text+0x76bc): undefined reference to `trunc'
xmlschemastypes.c:(.text+0x7710): undefined reference to `floor'
xmlschemastypes.c:(.text+0x7760): undefined reference to `floor'
collect2: ld returned 1 exit status