title: CMake "clang++ is not able compile a simple test program" (Fedora 20)
body: <p>So I tried to install clang + cmake to compile a simple C++ program and I'm getting the following error:</p>
  
  <pre><code>-- The C compiler identification is GNU 4.8.3
  -- The CXX compiler identification is Clang 3.5.0
  -- Check for working C compiler: /usr/bin/cc
  -- Check for working C compiler: /usr/bin/cc -- works
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working CXX compiler: /usr/local/bin/clang++
  -- Check for working CXX compiler: /usr/local/bin/clang++ -- broken
  CMake Error at /usr/share/cmake/Modules/CMakeTestCXXCompiler.cmake:54 (message):
    The C++ compiler "/usr/local/bin/clang++" is not able to compile a simple
    test program.
  
    It fails with the following output:
  
     Change Dir: /home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp
  
  
  
    Run Build Command:/usr/bin/gmake "cmTryCompileExec697180971/fast"
  
    /usr/bin/gmake -f CMakeFiles/cmTryCompileExec697180971.dir/build.make
    CMakeFiles/cmTryCompileExec697180971.dir/build
  
    gmake[1]: Entering directory
    `/home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp'
  
    /usr/bin/cmake -E cmake_progress_report
    /home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp/CMakeFiles 1
  
    Building CXX object
    CMakeFiles/cmTryCompileExec697180971.dir/testCXXCompiler.cxx.o
  
    /usr/local/bin/clang++ -o
    CMakeFiles/cmTryCompileExec697180971.dir/testCXXCompiler.cxx.o -c
    /home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
  
    Linking CXX executable cmTryCompileExec697180971
  
    /usr/bin/cmake -E cmake_link_script
    CMakeFiles/cmTryCompileExec697180971.dir/link.txt --verbose=1
  
    /usr/local/bin/clang++
    CMakeFiles/cmTryCompileExec697180971.dir/testCXXCompiler.cxx.o -o
    cmTryCompileExec697180971 -rdynamic
  
    /usr/bin/ld: cannot find -lstdc++
  
    clang: error: linker command failed with exit code 1 (use -v to see
    invocation)
  
    gmake[1]: Leaving directory
    `/home/jtcwang/tmp/CMake/CMake/CMakeFiles/CMakeTmp'
  
    gmake[1]: *** [cmTryCompileExec697180971] Error 1
  
    gmake: *** [cmTryCompileExec697180971/fast] Error 2
  </code></pre>
  
  <p>It's not even compiling my program because it fails to compile a test program.</p>
  
  <p>Looks like the important line is here:</p>
  
  <pre><code> /usr/bin/ld: cannot find -lstdc++
  </code></pre>
  
  <p>However, I have checked that <code>libstdc++</code> is installed and up to date, so at this point I'm quite lost.</p>
  
  <p>Other things I've tried:</p>
  
  <ol>
  <li>Using prebuilt binaries instead of <code>sudo yum install clang</code></li>
  <li>remove and reinstall</li>
  <li>Tried <code>clang++ hello.cpp</code> (hello world program). It says <code>&lt;iostreams&gt;</code> is not found. Is clang missing a standard library? EDIT: changing to <code>&lt;iostream&gt;</code> gives me the same linker error above.</li>
  </ol>
  
  <p>I'm not familiar with the clang, cmake and C++ scene in general, so I'd appreciate any pointers. Thanks!</p>