Install llvm and clang

Install llvm and clang

1. Download llvm and clang source code. [http://releases.llvm.org/download.html#3.4.2]
   //cfe-3.4.2 is clang3.4.2
   $wget http://releases.llvm.org/3.4.2/cfe-3.4.2.src.tar.gz
   $wget http://releases.llvm.org/3.4.2/llvm-3.4.2.src.tar.gz

2. unzip and build LLVM and Clang.
   $tar zxvf llvm-3.4.2.src.tar.gz
   $tar zxvf cfe-3.4.2.src.tar.gz
   //rename cfe-3.4.2.src to clang
   $mv cfe-3.4.2.src clang
   //move clang source code into llvm’s tools dir
   $mv clang llvm-3.4.2.src/tools
   $cd llvm-3.4.2.src
   $mkdir build
   $./configure –enable-optimized –enable-assertions –prefix=/home/jeremy/Tools/llvm-3.4.2.src/build

   $make
   //$make check-all — This runs the regression tests to ensure everything is in working order.

   $make install

3. Configure the environment variable.

   • Add the following two lines to the end of “~/.bashrc” file: (change the corresponding build pathname to your system)

   export PATH=/home/jeremy/Tools/llvm-3.4.2/build/bin:$PATH
   
   export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/jeremy/Tools/llvm-3.4.2/build/lib

   • $source ~/.bashrc
   • Now, the commands such as “llvm-config” and “clang” should be available in command line.
     (Those commands are in “llvm-3.4.2/build/bin” directory )

Reference:

http://clang.llvm.org/get_started.html
http://releases.llvm.org/3.4.2/docs/GettingStarted.html