centos7.0-gcc-8.0编译安装llvm及clang7.0

### 安装gcc 8.x和cmake 3.x

##### 添加yum源

yum install -y epel-release centos-release-scl centos-release-scl-rh
yum clean all
yum makecache

##### 安装

yum install -y devtoolset-8 cmake3

### 安装编译llvm/clang所需要的库和相关软件

yum install -y libedit-devel libxml2-devel ncurses-devel perl-Data-Dumper python-devel swig

### 下载llvm 7.0.1和clang 7.0.1源代码并放入指定路径

wget https://releases.llvm.org/7.0.1/llvm-7.0.1.src.tar.xz
tar -Jxf llvm-7.0.1.src.tar.xz
mv llvm-7.0.1.src llvm

wget https://releases.llvm.org/7.0.1/cfe-7.0.1.src.tar.xz
tar -Jxf cfe-7.0.1.src.tar.xz
mv cfe-7.0.1.src/ llvm/tools/clang

wget https://releases.llvm.org/7.0.1/compiler-rt-7.0.1.src.tar.xz
tar -Jxf compiler-rt-7.0.1.src.tar.xz
mv compiler-rt-7.0.1.src llvm/projects/compiler-rt

wget https://releases.llvm.org/7.0.1/libcxx-7.0.1.src.tar.xz
tar -Jxf libcxx-7.0.1.src.tar.xz
mv libcxx-7.0.1.src/ llvm/projects/libcxx

wget https://releases.llvm.org/7.0.1/libcxxabi-7.0.1.src.tar.xz
tar -Jxf libcxxabi-7.0.1.src.tar.xz
mv libcxxabi-7.0.1.src/ llvm/projects/libcxxabi

wget https://releases.llvm.org/7.0.1/libunwind-7.0.1.src.tar.xz
tar -Jxf libunwind-7.0.1.src.tar.xz
mv libunwind-7.0.1.src/ llvm/projects/libunwind

wget https://releases.llvm.org/7.0.1/lld-7.0.1.src.tar.xz
tar -Jxf lld-7.0.1.src.tar.xz
mv lld-7.0.1.src/ llvm/tools/lld

wget https://releases.llvm.org/7.0.1/lldb-7.0.1.src.tar.xz
tar -Jxf lldb-7.0.1.src.tar.xz
mv lldb-7.0.1.src llvm/tools/lldb

wget https://releases.llvm.org/7.0.1/openmp-7.0.1.src.tar.xz
tar -Jxf openmp-7.0.1.src.tar.xz
mv openmp-7.0.1.src llvm/projects/openmp

wget https://releases.llvm.org/7.0.1/polly-7.0.1.src.tar.xz
tar -Jxf polly-7.0.1.src.tar.xz
mv polly-7.0.1.src llvm/tools/polly

wget https://releases.llvm.org/7.0.1/clang-tools-extra-7.0.1.src.tar.xz
tar -Jxf clang-tools-extra-7.0.1.src.tar.xz
mv clang-tools-extra-7.0.1.src llvm/tools/clang/tools/extra

### 编译llvm 7.0.1/clang 7.0.1

#启用8.x版本GCC

source /opt/rh/devtoolset-8/enable
cd llvm
mkdir build
cd build
cmake3 -G "Unix Makefiles" -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCLANG_DEFAULT_CXX_STDLIB=libc++ -DCMAKE_BUILD_TYPE="Release" ..
make -j4

### 安装llvm 7.0.1/clang 7.0.1

cp -r lib64/python2.7 lib/python2.7
make install
make install-cxx install-cxxabi
echo "/usr/local/lib" >> /etc/ld.so.conf.d/llvm-clang.conf

########安装openssl

yum -y install openssl openssl-devel

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