gcc版本升级

升级链接：

CentOS 7 gcc版本需升级到7.5.0 ，详细可参考文档：https://learn.microsoft.com/zh-cn/azure/cognitive-services/speech-service/how-to-configure-rhel-centos-7

按照上面的操作完成后，还是不行，语音转换接口访问还是报错。按照如下步骤，将库文件改掉，将旧的包卸载，然后加上环境变量。注意：最后将用到高版本gcc的transform服务重启，才能生效，此时再次调用这个接口，文本正常转为mp3语音

sudo rpm -Uvh https://packages.microsoft.com/config/rhel/7/packages-microsoft-prod.rpm
sudo yum update -y
sudo yum groupinstall -y "Development tools"
sudo yum install -y alsa-lib dotnet-sdk-2.1 java-1.8.0-openjdk-devel openssl
sudo yum install -y gstreamer1 gstreamer1-plugins-base gstreamer1-plugins-good gstreamer1-plugins-bad-free gstreamer1-plugins-ugly-free
cd /usr/local
yum install -y gmp-devel mpfr-devel libmpc-devel
curl https://ftp.gnu.org/gnu/gcc/gcc-7.5.0/gcc-7.5.0.tar.gz -O
tar -xf gcc-7.5.0.tar.gz
mkdir gcc-7.5.0-build && cd gcc-7.5.0-build
../gcc-7.5.0/configure --enable-languages=c,c++ --disable-bootstrap --disable-multilib --prefix=/usr/local
make -j$(nproc)
sudo make install-strip

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cd /usr/lib64/
rm -rf libstdc++.so.6
rm -rf libstdc++.so.6.0.24
cp /usr/local/gcc-7.5.0-build/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.24 .
ln -sv libstdc++.so.6.0.24 libstdc++.so.6
cd /usr/local/lib64/
rm -rf libstdc++.so.6
rm -rf libstdc++.so.6.0.24
cp /usr/local/gcc-7.5.0-build/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.24 .
ln -sv libstdc++.so.6.0.24 libstdc++.so.6
yum remove gcc gcc-c++ -y
cd
vim .bash_profile
添加PATH=$PATH:$HOME/bin:/usr/local/bin/
export CC=/usr/local/bin/gcc
export CXX=/usr/local/bin/g++
w 保存

export LD_LIBRARY_PATH=/usr/local/lib64:$LD_LIBRARY_PATH
export PATH=/usr/local/bin:$PATH
source ~/.bash_profile
gcc --version