#!/bin/bash
# host添加 源地址
echo ‘199.232.96.133 raw.githubusercontent.com‘ >> /etc/hosts
# 下载nvm
curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.37.0/install.sh | bash
echo ‘export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"‘ >> /etc/profile
source /etc/profile
nvm --version
# 下载node.js
nvm install v10.12.0
node -v
# 下载unixodbc
yum install unixodbc
# 配置odbc
cp odbc.ini /etc/
cp odbcinst.ini /etc/
#配置达梦环境变量
echo "export LD_LIBRARY_PATH=/usr/local/lib:/opt/dmdbms/bin:\$LD_LIBRARY_PATH" >> /etc/profile
echo "export PATH=/opt/dmdbms/bin:\$PATH" >> /etc/profile
source /etc/profile
odbcinst -j
isql -v DM8

##更新yum源，ubuntu可以忽略
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
sed -i  ‘s/$releasever/7/g‘ /etc/yum.repos.d/CentOS-Base.repo
#清空缓存：yum clean all
#生成缓存：yum makecache
#更新源：sudo yum update

更新gcc版本到5.4

下载：
Wget http://mirror.hust.edu.cn/gnu/gcc/gcc-5.4.0/gcc-5.4.0.tar.bz2（国内镜像）

gcc ftp下载地址：
ftp://ftp.mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-4.7.2/


下载完成后，执行命令：
tar -jxvf gcc-5.4.0.tar.bz2 获得gcc-5.4.0文件夹
mkdir build （以后的操作目录）
cd gcc-5.4.0/

./contrib/download_prerequisites(这里在下载一些安装gcc会用到的文件，如果没配置wget则会失败。)

cd ../build/ (来到工作目录)

接下来要安装gmp、mpfr、mpc

gmp：
../gcc-5.4.0/gmp-4.3.2/configure
sudo make
sudo make install

mpfr:
../gcc-5.4.0/mpfr-2.4.2/configure
sudo make
sudo make install

../gcc-5.4.0/mpc-0.8.1/configure
sudo make
sudo make install

现在再安装gcc就可以了
../gcc-5.4.0/configure –enable-threads=posix –disable-checking –disable-multilib –enable-languages=c,c++
sudo make （及其耗时，将近两个小时）
sudo make install
gcc –version (验证gcc版本是否为5.4.0)
参考：https://www.qedev.com/linux/91867.html

../gcc-5.4.0/configure –enable-threads=posix –disable-checking –disable-multilib –enable-languages=c,c++ -disable-libsanitizer    #需要加上最后一段，不然会出现问题3

#######
遇到的问题 1
./md-unwind-support.h:61:47: 错误： dereferencing pointer to incomplete type ‘struct ucontext’
sc = (struct sigcontext *) (void *) &uc_->uc_mcontext
————————————————
问题参考链接
https://blog.csdn.net/juan190755422/article/details/103709300


#######
问题2
../../../../gcc-5.4.0/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:146:23: 致命错误： sys/ustat.h：没有那个文件或目录
编译中断。
make[4]: *** [Makefile:449：sanitizer_platform_limits_posix.lo] 错误 1
make[4]: 离开目录“/home/software/gcc/build/x86_64-unknown-linux-gnu/libsanitizer/sanitizer_common”
make[3]: *** [Makefile:437：all-recursive] 错误 1
make[3]: 离开目录“/home/software/gcc/build/x86_64-unknown-linux-gnu/libsanitizer”
make[2]: *** [Makefile:307：all] 错误 2
make[2]: 离开目录“/home/software/gcc/build/x86_64-unknown-linux-gnu/libsanitizer”
make[1]: *** [Makefile:16925：all-target-libsanitizer] 错误 2
make[1]: 离开目录“/home/software/gcc/build”
make: *** [Makefile:913：all] 错误 2

参考链接
https://zhuanlan.zhihu.com/p/377881136


############
问题3
In file included from ../../../../gcc-5.4.0/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:179:0:
../../../../gcc-5.4.0/libsanitizer/sanitizer_common/sanitizer_internal_defs.h:272:72: 错误： size of array ‘assertion_failed__1090’ is negative



参考链接
https://zhuanlan.zhihu.com/p/357264769