title: OpenSSL compilation issue with SSL_export_keying_material()
body: <p>I am trying to call the method SSL_export_keying_material() from an SSL Client program. However calling this method fails the program compilation. I get the following error. How can I over come this compilation error?</p>
  
  <pre><code>clang -cc1 version 5.1 based upon LLVM 3.4svn default target x86_64-apple-darwin13.2.0
  #include "..." search starts here:
  #include &lt;...&gt; search starts here:
   /usr/local/include
   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/5.1/include
   /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
   /usr/include
   /System/Library/Frameworks (framework directory)
   /Library/Frameworks (framework directory)
  End of search list.
   "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld" -demangle -dynamic -arch x86_64 -macosx_version_min 10.9.0 -o withssl -lssl -lcrypto /var/folders/1b/smlgh1256t95yw11pqs2hz380000gn/T/withssl-08785c.o -lSystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/5.1/lib/darwin/libclang_rt.osx.a
  Undefined symbols for architecture x86_64:
    "_SSL_export_keying_material", referenced from:
        _main in withssl-08785c.o
  ld: symbol(s) not found for architecture x86_64
  clang: error: linker command failed with exit code 1
  </code></pre>
  
  <p>Thank you</p>