CentOS 6.5 安装Clang 3.5.0

来自引用:
http://www.cnblogs.com/dudu/p/4294374.htmlhtml

编译llvm几乎耗费了1个小时…..python

编译CoreCLR须要Clang 3.5,而CentOS上安装的是Clang 3.4.2(yum repos中最新版也是这个),只能本身手工编译LLVM的源代码进行安装。c++

(注:CentOS的版本是6.6)sql

1、安装libstdc++4.7centos

(注:若是是CentOS 7.0,不须要这步)markdown

wget http://people.centos.org/tru/devtools-2/devtools-2.repo -O /etc/yum.repos.d/devtools-2.repo
yum install devtoolset-2-gcc devtoolset-2-binutils devtoolset-2-gcc-c++
ln -s /opt/rh/devtoolset-2/root/usr/bin/* /usr/local/bin/
若是不安装,在configure配置编译选项时会出现下面的错误提示:python2.7

We detected a missing feature in the standard C++ library that was known to be
missing in libstdc++4.6 and implemented in libstdc++4.7. There are numerous
C++11 problems with 4.6’s library, and we don’t support GCCs or libstdc++ older
than 4.7.
2、安装Python 2.7.9测试

(注:若是是CentOS 7.0,不须要这步)ui

CentOS 6.6自带的是Python 2.6.6,而编译llvm须要Python 2.7以上。sqlite

1)安装编译Python须要的包包

yum install zlib-devel
yum install bzip2-devel
yum install openssl-devel
yum install ncurses-devel
yum install sqlite-devel
2)下载并解压Python 2.7.9的源代码

cd /opt
wget –no-check-certificate https://www.python.org/ftp/python/2.7.9/Python-2.7.9.tar.xz
tar xf Python-2.7.9.tar.xz
cd Python-2.7.9
3)编译与安装Python 2.7.9

./configure –prefix=/usr/local
make && make altinstall
4)将python命令指向Python 2.7.9

ln -s /usr/local/bin/python2.7 /usr/local/bin/python
3、添加交换分区

若是编译的机器内存比较小,建议添加交换分区。我当时测试的机器只有1G内存,在编译过程当中出现了“c++: internal compiler error: Killed (program cc1plus)”错误。

1)建立并激活交换文件(好比2G):

dd if=/dev/zero of=/swapfile bs=1k count=2048000
mkswap /swapfile
swapon /swapfile
2)修改 /etc/fstab 文件让交换文件启动时自动加载,添加以下内容:

/swapfile swap swap defaults 0 0
4、编译LLVM

1)下载llvm的源代码

http://llvm.org/releases/3.5.0/llvm-3.5.0.src.tar.xz
mv llvm-3.5.0.src llvm
2)下载clang的源代码

cd llvm/tools
wget http://llvm.org/releases/3.5.0/cfe-3.5.0.src.tar.xz
tar xf cfe-3.5.0.src.tar.xz
mv cfe-3.5.0.src clang
3)下载compiler-rt的源代码

cd ../projects
wget http://llvm.org/releases/3.5.0/compiler-rt-3.5.0.src.tar.xz
tar xf compiler-rt-3.5.0.src.tar.xz
mv compiler-rt-3.5.0.src compiler-rt
4)配置编译选项

cd ..
./configure –enable-optimized CC=gcc CXX=g++
5)编译llvm

make -j2
编译成功后的提示:

llvm[0]: * Completed Release+Asserts Build
6)安装编译好的llvm

make install
会安装在/usr/local/bing中

7)检查clang的版本

clang –version

clang version 3.5.0 (tags/RELEASE_350/final)
若是仍是旧版本,须要将/usr/bin/clang指向clang 3.5.0:

ls -s /usr/local/bin/clang /usr/bin/clang
【相关连接】

如何在CentOS上安装libstdc++4.7

在Linux CentOS 6.6上安装Python 2.7.9

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