# cmake . -DMYSQL=ON -DMARIADB=ON
    -- The C compiler identification is GNU 4.9.2
    -- The CXX compiler identification is GNU 4.9.2
    -- 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/bin/c++
    -- Check for working CXX compiler: /usr/bin/c++ -- works
    -- Detecting CXX compiler ABI info
    -- Detecting CXX compiler ABI info - done
    -- Found Git: /usr/bin/git (found version "2.1.4")
    -- Performing Test COMPILER_SUPPORTS_CXX11
    -- Performing Test COMPILER_SUPPORTS_CXX11 - Success
    -- Architecture is x86_64
    -- Found OpenSSL: /usr/lib/x86_64-linux-gnu/libssl.so;/usr/lib/x86_64-linux-gnu/libcrypto.so (found version "1.0.1t")
    -- Looking for include file pthread.h
    -- Looking for include file pthread.h - found
    -- Looking for pthread_create
    -- Looking for pthread_create - not found
    -- Looking for pthread_create in pthreads
    -- Looking for pthread_create in pthreads - not found
    -- Looking for pthread_create in pthread
    -- Looking for pthread_create in pthread - found
    -- Found Threads: TRUE
    -- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.2.8")
    -- * Found MariaDB library: /usr/lib/x86_64-linux-gnu/libmysqlclient.a
    -- * Found MariaDB include directory: /usr/include/mysql
    -- * PQuery revision is: 3800fd4
    -- Configuring done
    -- Generating done
    -- Build files have been written to: /opt/pquery

    # make
    Scanning dependencies of target inih++
    [ 16%] Building C object src/third_party/inih++/lib/CMakeFiles/inih++.dir/ini.c.o
    <command-line>:0:0: error: "FORK" redefined
    <command-line>:0:0: note: this is the location of the previous definition
    src/third_party/inih++/lib/CMakeFiles/inih++.dir/build.make:54: recipe for target 'src/third_party/inih++/lib/CMakeFiles/inih++.dir/ini.c.o' failed
    make[2]: *** [src/third_party/inih++/lib/CMakeFiles/inih++.dir/ini.c.o] Error 1
    CMakeFiles/Makefile2:157: recipe for target 'src/third_party/inih++/lib/CMakeFiles/inih++.dir/all' failed
    make[1]: *** [src/third_party/inih++/lib/CMakeFiles/inih++.dir/all] Error 2
    Makefile:137: recipe for target 'all' failed
    make: *** [all] Error 2