在Ubuntu 12.04到4.8.2中升级GCC 4.6.3。

I'm about to update default GCC (version 4.6.3) shipped by Ubuntu 12.04 to 4.8.2, though the compilation requires a standalone C++ compiler

我将更新Ubuntu 12.04到4.8.2版的默认GCC(版本4.6.3)，尽管编译需要一个独立的c++编译器。

admin@ubuntu: /usr/local/gcc_build$ sudo make

ends up with

结束了

configure: error: C++ compiler missing or inoperational
make[2]: *** [configure-stage1-libcpp] Error 1

Therefore I turn to the process of g++ installation with a preference to the latest version, which means that I would like to compile from source directly rather than apt-get. But seriously, I can't find the source anyway!(O_o). On the other hand, does the source of GCC also come along with that of g++ in the tar file I downloaded, or not? Thanks.

因此，我倾向于使用最新版本的g++安装过程，这意味着我希望直接从源代码编译而不是用apt-get。但说真的，我找不到来源!另一方面，在我下载的tar文件中，GCC的源代码也与g++的源代码一起出现吗?谢谢。

PS: problem remains unsolved with admin@ubuntu: /usr/local/gcc_build$ /home/admin/gcc-4.8.2/configure --enable-languages=c,c++

问题仍然没有得到解决:admin@ubuntu: /usr/local/gcc_build$ /home/admin/gcc-4.8.2/configure—enablelanguage =c,c++。

3 个解决方案

#1

You can easily compile the sources.

您可以轻松地编译源代码。

The following commands worked for gcc 4.7. They should be fine for gcc 4.8 as well:

下面的命令适用于gcc 4.7。对于gcc 4.8，它们也应该没问题:

sudo apt-get install libmpfr-dev libgmp3-dev libmpc-dev flex bison

svn checkout svn://gcc.gnu.org/svn/gcc/trunk

cd trunk

./configure --prefix=/opt/gcc-4.8.2/usr/local/gcc-4.8.2 --enable-languages=c,c++

make

make install

The compiler will be placed in the /opt/ directory, so you have to use it from there.

编译器将被放置在/opt/目录中，所以您必须从那里使用它。

#2

Add the ppa by

添加的ppa

sudo add-apt-repository ppa:ubuntu-toolchain-r/test

sudo add-apt-repository ppa:ubuntu-toolchain-r /测试
Install g++ and gcc (version 4.8)

安装g++和gcc(版本4.8)

sudo apt-get update; sudo apt-get install gcc-4.8 g++-4.8

sudo apt-get更新;sudo apt-get安装gcc-4.8 g+ -4.8。
Run the following commands one by one,

一个接一个地运行下列命令，

sudo update-alternatives --remove-all gcc

sudo update-alternatives——删除所有gcc

sudo update-alternatives --remove-all g++

sudo update-alternatives——删除所有g + +

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 20

sudo更新-替代品-安装/usr/bin/gcc /usr/bin/gcc-4.8 20。

sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 20

sudo更新替代方案——安装/usr/bin/g++ g++ /usr/bin/g+ -4.8 20。

sudo update-alternatives --config gcc

sudo update-alternatives——配置gcc

sudo update-alternatives --config g++

sudo update-alternatives——配置g++

That's it you are done!

就是这样!

#3

Do you want to compile it yourself ? If not, there is a PPA, described here

您想自己编译它吗?如果没有，这里有一个PPA。

#1