linux gcc降版本

转载：https://www.programering.com/a/MDMyMTMwATI.html

Because matlab R2012a GCC version 4.4, in order to keep the Ubuntu GCC version of the same to compile, so to install the gcc-4.4 version. The following only records the installation error solution:

1 check /etc/apt/sources.list and sudo

sudo gedit /etc/apt/sources.list

2 add the following code to the file:

# stable
deb http://ftp.de.debian.org/debian/ sarge main contrib non-free
deb-src http://ftp.de.debian.org/debian/ sarge main contrib non-free
deb http://ftp.de.debian.org/debian-non-US/ sarge/non-US main contrib non-free
deb-src http://ftp.de.debian.org/debian-non-US/ sarge/non-US main contrib non-free

The 3 Update

sudo apt-get update

4 installation of GCC and g++

sudo apt-get install gcc-4.4 g++-4.4 g++-4.4-multilib

 

 转载：https://blog.youkuaiyun.com/hunter___/article/details/89306778 

解决"package gcc-4.4 is not available, but is referred to by another package"方法：

1.sudo vim /etc/apt/sources.list

在最后添加：

# stable add by , in order to install g++4.4
deb http://dk.archive.ubuntu.com/ubuntu/ trusty main universe
 
2.history 如下：

 
 2046  sudo vim /etc/apt/sources.list
 2047  sudo apt update 
 2048  sudo apt-get install gcc-4.4 g++-4.4 g++-4.4-multilib
 
 2050  g++ -v
 
 2057  cd ../bin/
 2058  ls g++*
 2059  ls g++* -l
 2060  sudo mv g++ g++.bak
 2061  ls g++* -l
 2062  ls gcc* -l
 2063  sudo mv gcc gcc.bak
 2064  ls gcc* -l
 2065  sudo ln -s g++-4.4 g++
 2066  ls g++* -l
 2067  sudo ln -s gcc-4.4 gcc
 2068  ls gcc* -l
 

降版本成功：