类似的问题，运行以下：

For all those stuck with a similar problem, run the following:

LD_LIBRARY_PATH=/usr/local/lib64/:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH

当你编译和安装GCC它确实把库放在这里，如常见问题所述（ http://gcc.gnu.org/onlinedocs/libstdc++/faq.html ＃faq.how_to_set_paths ），您需要添加它。

When you compile and install GCC it does put the libraries here but that's it. As the FAQs say ( http://gcc.gnu.org/onlinedocs/libstdc++/faq.html#faq.how_to_set_paths ) you need to add it.

我假设我如何保证动态链接库将被找到？意味着我如何确保它总是找到不是它不会找到，你需要这样做

I assumed "How do I insure that the dynamically linked library will be found? " meant "how do I make sure it is always found" not "it wont be found, you need to do this"

对于那些不设置前缀的用户，它是/ usr / local / lib64

For those who don't bother setting a prefix, it is /usr/local/lib64

在安装gcc时，如果您阅读make输出，您可以简单地找到这一点：

You can find this mentioned briefly when you install gcc if you read the make output:

Libraries have been installed in:
   /usr/local/lib/../lib32
If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
   - add LIBDIR to the `LD_LIBRARY_PATH' environment variable
     during execution
   - add LIBDIR to the `LD_RUN_PATH' environment variable
     during linking
   - use the `-Wl,-rpath -Wl,LIBDIR' linker flag
   - have your system administrator add LIBDIR to `/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages. 

Grr很简单！还如果你偶然想要链接到安装的库 - 认真？

Grr that was simple! Also "if you ever happen to want to link against the installed libraries" - seriously?