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  17 <h1>Building and Installing Polly</h1>
  18
  19 <h2> Automatic </h2>
  20
  21 There is a <a href="polly.sh">script</a> available to automatically checkout,
  22 update, build, and test Polly. This script contains all the commands that are
  23 subsequently described on this webpage. The automatic installation consists
  24 of four simple steps:
  25
  26 <pre>
  27 mkdir polly &amp;&amp; cd polly
  28 wget http://polly.llvm.org/polly.sh
  29 chmod +x polly.sh
  30 ./polly.sh
  31 </pre>
  32
  33 <h2> Manual </h2>
  34 <h3 id="source"> Get the code </h3>
  35
  36 <p><b>Warning:</b> Polly/LLVM/clang need to be checked out at the same time.</p>
  37
  38 <pre>
  39 git clone http://llvm.org/git/llvm.git llvm_git
  40 git clone http://llvm.org/git/polly.git llvm_git/tools/polly
  41
  42 # Also build the matching clang-version (optional)
  43 git clone http://llvm.org/git/clang.git llvm_git/tools/clang
  44 </pre>
  45 <h3 id="build">Build Polly</h3>
  46
  47 <pre>
  48 mkdir llvm_build && cd llvm_build
  49 cmake ../llvm_git && make
  50 </pre>
  51
  52 <h3> Test Polly</h3>
  53
  54 <pre>make check-polly</pre>
  55
  56
  57 <h3> Troubleshooting</h3>
  58
  59 <p>If you get an error in one of the python files, your system probably uses python3
  60 as default python interpreter. This is the case, for instance, under Arch Linux.
  61 To solve this issue, run <code>cmake</code> again, but with the added argument:
  62 <code>-DPYTHON_EXECUTABLE=/usr/bin/python2</code> (replace <code>/usr/bin/python2</code>
  63 with the location of the python2 interpreter under your system).
  64
  65 <pre>cmake -DCMAKE_PREFIX_PATH=${ISL_INSTALL} -DPYTHON_EXECUTABLE=/usr/bin/python2 ${LLVM_SRC}</pre>
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