FIX: libmpfr.so.4: cannot open shared object file: No such file or directory

在ubuntu上使用toolchain產生zlib-1.2.5時發生了問題，在使用configure出現了：
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Checking for shared library support...
Tested arm-buildroot-linux-uclibcgnueabi-gcc -w -c -O ztest17184.c
/home/ken/WrkSrc/toolchain/buildroot-2012.11.1/output/host/usr/bin/../libexec/gcc/arm-buildroot-linux-uclibcgnueabi/4.4.0/cc1: error while loading shared libraries: libmpfr.so.4: cannot open shared object file: No such file or directory
Tested cc -shared -O -o ztest17184.so ztest17184.o
cc: error: ztest17184.o: No such file or directory
cc: fatal error: no input files
compilation terminated.

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可是當初在fedora 11上使用時卻沒有出現這樣的問題(
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Checking for shared library support...
Building shared library libz.so.1.2.5 with arm-buildroot-linux-uclibcgnueabi-gcc.
Checking for off64_t... Yes.
Checking for fseeko... Yes.

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所以上google搜尋，發現了以下的網頁

http://stackoverflow.com/questions/5905434/building-gcc-4-6-libmpfr-so-4-cannot-open-shared-object-file

其中有類似的問題，然而解決的方式是：宣告 "LD_LIBRARY_PATH"，所以嘗試 "LD_LIBRABY_PATH" 指向到 toolchain 的 lib 目錄後就可以正常 configure。


PS：
當以上步驟做完後，可以一起解決"lzp=2.04" configure遇到的問題。
cd lzo-2.04; CC=arm-buildroot-linux-uclibcgnueabi-gcc RANLIB=/home/ken/WrkSrc/toolchain/buildroot-2012.11.1/output/host/usr/bin/arm-buildroot-linux-uclibcgnueabi-ranlib ./configure --host=arm-buildroot-linux-uclibcgnueabi --prefix=/home/ken/WrkSrc/toolchain/buildroot-2012.11.1/output/host/usr/arm-buildroot-linux-uclibcgnueabi/
configure: WARNING: if you wanted to set the --build type, don't use --host.
    If a cross compiler is detected then cross compile mode will be used
configure: Configuring LZO 2.04
checking build system type... x86_64-unknown-linux-gnu
checking host system type... arm-buildroot-linux-uclibcgnueabi
checking target system type... arm-buildroot-linux-uclibcgnueabi
checking whether to enable maintainer-specific portions of Makefiles... no
checking for arm-buildroot-linux-uclibcgnueabi-gcc... arm-buildroot-linux-uclibcgnueabi-gcc
checking whether the C compiler works... no
configure: error: in `/home/ken/WrkSrc/svn/grain/platform/faraday/toolchain_lib/lzo-2.04':
configure: error: C compiler cannot create executables
See `config.log' for more details
make: *** [prebuild] Error 77