centos 7 gcc升级后配置完无法启动gcc 帮忙看一下哪里配置错了
现在gcc -v 显示无文件了
```bash
Libraries have been installed in:
/usr/local/gcc-10.2.0/lib/../lib64
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.
----------------------------------------------------------------------
make[4]: 对“install-data-am”无需做任何事。
make[4]: 离开目录“/data/gcc-10.2.0/x86_64-pc-linux-gnu/libatomic”
make[3]: 离开目录“/data/gcc-10.2.0/x86_64-pc-linux-gnu/libatomic”
make[2]: 离开目录“/data/gcc-10.2.0/x86_64-pc-linux-gnu/libatomic”
make[1]: 离开目录“/data/gcc-10.2.0”
[root@localhost gcc-10.2.0]# find / -name "libstdc++.so*"
/usr/lib/gcc/x86_64-redhat-linux/4.8.2/32/libstdc++.so
/usr/lib/gcc/x86_64-redhat-linux/4.8.2/libstdc++.so
/usr/lib64/libstdc++.so.6
/usr/lib64/libstdc++.so.6.0.19
/usr/lib64/libstdc++.so.6.0.22
/usr/share/gdb/auto-load/usr/lib64/libstdc++.so.6.0.19-gdb.py
/usr/share/gdb/auto-load/usr/lib64/libstdc++.so.6.0.19-gdb.pyc
/usr/share/gdb/auto-load/usr/lib64/libstdc++.so.6.0.19-gdb.pyo
/usr/local/gcc-10.2.0/lib/libstdc++.so.6.0.28
/usr/local/gcc-10.2.0/lib/libstdc++.so.6
/usr/local/gcc-10.2.0/lib/libstdc++.so
/usr/local/gcc-10.2.0/lib/libstdc++.so.6.0.28-gdb.py
/usr/local/gcc-10.2.0/lib64/libstdc++.so.6.0.28
/usr/local/gcc-10.2.0/lib64/libstdc++.so.6
/usr/local/gcc-10.2.0/lib64/libstdc++.so
/usr/local/gcc-10.2.0/lib64/libstdc++.so.6.0.28-gdb.py
/data/gcc-10.2.0/prev-x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so.6.0.28
/data/gcc-10.2.0/prev-x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so.6
/data/gcc-10.2.0/prev-x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so
/data/gcc-10.2.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.28
/data/gcc-10.2.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6
/data/gcc-10.2.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so
/data/gcc-10.2.0/stage1-x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so.6.0.28
/data/gcc-10.2.0/stage1-x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so.6
/data/gcc-10.2.0/stage1-x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so
/data/gcc-10.2.0/stage1-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.28
/data/gcc-10.2.0/stage1-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6
/data/gcc-10.2.0/stage1-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so
/data/gcc-10.2.0/x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so.6.0.28
/data/gcc-10.2.0/x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so.6
/data/gcc-10.2.0/x86_64-pc-linux-gnu/32/libstdc++-v3/src/.libs/libstdc++.so
/data/gcc-10.2.0/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.28
/data/gcc-10.2.0/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6
/data/gcc-10.2.0/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so
mv /usr/lib64/libstdc++.so.6 /usr/lib64/libstdc++.so.6.bak
mv /usr/lib64/libstdc++.so /usr/lib64/libstdc++.so.bak
mv /usr/bin/gcc /usr/bin/gcc485
mv /usr/bin/g++ /usr/bin/g++485
mv /usr/bin/c++ /usr/bin/c++485
mv /usr/bin/cc /usr/bin/cc485
#创建新软连
ln -s /usr/local/gcc-10.2.0/bin/gcc /usr/bin/gcc
ln -s /usr/local/gcc-10.2.0/bin/g++ /usr/bin/g++
ln -s /usr/local/gcc-10.2.0/bin/c++ /usr/bin/c++
ln -s /usr/local/gcc-10.2.0/bin/gcc /usr/bin/cc
ln -s /usr/local/gcc-10.2.0/lib64/libstdc++.so.6.0.28 /usr/lib64/libstdc++.so.6
ln -s /usr/local/gcc-10.2.0/lib64/libstdc++.so.6.0.28 /usr/lib64/libstdc++.so
```