title: CMake no longer finds static Boost libraries
body: <p>I am working on a large C++ project that relies on Boost. The project is built on a variety of platforms using CMake. On my Windows machine, I am using CMake 2.8.9, Visual Studio 2010 and Boost 1.50.0 (built from sources).</p>
  
  <p>I have been using CMake and Boost together for years without problem, with Boost versions as old as 1.33. <strong>Now, suddenly CMake no longer finds the Boost libraries</strong>. The only thing that has changed on my machine is that I recently installed Visual Studio 2012, but I don't think this has anything to do with the problem (on the other hand and as far as I remember, this is the <em>only</em> thing that has changed).</p>
  
  <p>Here is the command line I am using to invoke CMake:</p>
  
  <pre><code>cmake ..\src -DBOOST_ROOT=..\..\boost -DQT_QMAKE_EXECUTABLE=..\..\qt-4.8.0\bin\qmake.exe
  </code></pre>
  
  <p>This used to work flawlessly, but it now outputs:</p>
  
  <pre><code>-- Building for: Visual Studio 10
  -- Check for working C compiler using: Visual Studio 10
  -- Check for working C compiler using: Visual Studio 10 -- works
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working CXX compiler using: Visual Studio 10
  -- Check for working CXX compiler using: Visual Studio 10 -- works
  -- Detecting CXX compiler ABI info
  -- Detecting CXX compiler ABI info - done
  CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:1191 (message):
    Unable to find the requested Boost libraries.
  
    Boost version: 1.50.0
  
    Boost include path: C:/franz/dev/boost
  
    The following Boost libraries could not be found:
  
            boost_date_time
            boost_filesystem
            boost_regex
            boost_system
            boost_thread
  
    No Boost libraries were found.  You may need to set BOOST_LIBRARYDIR to the
    directory containing Boost libraries or BOOST_ROOT to the location of
    Boost.
  Call Stack (most recent call first):
    CMakeLists.txt:114 (find_package)
  
  
  -- Found OpenGL: opengl32
  -- Looking for Q_WS_X11
  -- Looking for Q_WS_X11 - not found.
  -- Looking for Q_WS_WIN
  -- Looking for Q_WS_WIN - found
  -- Looking for Q_WS_QWS
  -- Looking for Q_WS_QWS - not found.
  -- Looking for Q_WS_MAC
  -- Looking for Q_WS_MAC - not found.
  -- Found Qt4: C:/franz/dev/qt-4.8.0/bin/qmake.exe (found version "4.8.0")
  -- Configuring incomplete, errors occurred!
  </code></pre>
  
  <p>Apparently, it <em>did</em> find my Boost installation as it reports the correct path and version number.</p>
  
  <p>Here is the content of <code>C:\franz\dev\boost\stage\lib</code>:</p>
  
  <pre><code>08/18/2012  05:20 PM           360,294 libboost_chrono-vc100-mt-1_50.lib
  08/18/2012  05:19 PM         1,529,418 libboost_chrono-vc100-mt-gd-1_50.lib
  08/18/2012  05:20 PM           600,900 libboost_date_time-vc100-mt-1_50.lib
  08/18/2012  05:19 PM         2,064,420 libboost_date_time-vc100-mt-gd-1_50.lib
  08/18/2012  05:20 PM             5,478 libboost_exception-vc100-mt-1_50.lib
  08/18/2012  05:19 PM            39,634 libboost_exception-vc100-mt-gd-1_50.lib
  08/18/2012  05:20 PM           857,020 libboost_filesystem-vc100-mt-1_50.lib
  08/18/2012  05:20 PM         4,289,814 libboost_filesystem-vc100-mt-gd-1_50.lib
  08/18/2012  05:21 PM         5,811,696 libboost_graph-vc100-mt-1_50.lib
  08/18/2012  05:14 PM        14,388,384 libboost_graph-vc100-mt-gd-1_50.lib
  08/18/2012  05:21 PM           406,742 libboost_iostreams-vc100-mt-1_50.lib
  08/18/2012  05:14 PM         1,260,032 libboost_iostreams-vc100-mt-gd-1_50.lib
  08/18/2012  05:21 PM         6,886,724 libboost_locale-vc100-mt-1_50.lib
  08/18/2012  05:14 PM        22,056,376 libboost_locale-vc100-mt-gd-1_50.lib
  08/18/2012  05:22 PM         1,395,280 libboost_math_c99-vc100-mt-1_50.lib
  08/18/2012  05:15 PM         4,095,066 libboost_math_c99-vc100-mt-gd-1_50.lib
  08/18/2012  05:23 PM         1,410,172 libboost_math_c99f-vc100-mt-1_50.lib
  08/18/2012  05:15 PM         4,113,830 libboost_math_c99f-vc100-mt-gd-1_50.lib
  08/18/2012  05:23 PM         1,376,096 libboost_math_c99l-vc100-mt-1_50.lib
  08/18/2012  05:15 PM         4,056,498 libboost_math_c99l-vc100-mt-gd-1_50.lib
  08/18/2012  05:22 PM         5,832,008 libboost_math_tr1-vc100-mt-1_50.lib
  08/18/2012  05:15 PM        14,472,628 libboost_math_tr1-vc100-mt-gd-1_50.lib
  08/18/2012  05:22 PM         6,115,696 libboost_math_tr1f-vc100-mt-1_50.lib
  08/18/2012  05:15 PM        15,004,588 libboost_math_tr1f-vc100-mt-gd-1_50.lib
  08/18/2012  05:22 PM         5,779,786 libboost_math_tr1l-vc100-mt-1_50.lib
  08/18/2012  05:15 PM        14,362,836 libboost_math_tr1l-vc100-mt-gd-1_50.lib
  08/18/2012  05:25 PM           215,242 libboost_prg_exec_monitor-vc100-mt-1_50.lib
  08/18/2012  05:18 PM         1,226,324 libboost_prg_exec_monitor-vc100-mt-gd-1_50.lib
  08/18/2012  05:23 PM         6,425,284 libboost_program_options-vc100-mt-1_50.lib
  08/18/2012  05:16 PM        20,124,142 libboost_program_options-vc100-mt-gd-1_50.lib
  08/18/2012  05:24 PM         5,722,808 libboost_python-vc100-mt-1_50.lib
  08/18/2012  05:17 PM        21,947,816 libboost_python-vc100-mt-gd-1_50.lib
  08/18/2012  05:24 PM            83,144 libboost_random-vc100-mt-1_50.lib
  08/18/2012  05:17 PM           406,482 libboost_random-vc100-mt-gd-1_50.lib
  08/18/2012  05:21 PM        10,473,946 libboost_regex-vc100-mt-1_50.lib
  08/18/2012  05:13 PM        34,561,778 libboost_regex-vc100-mt-gd-1_50.lib
  08/18/2012  05:25 PM        11,650,480 libboost_serialization-vc100-mt-1_50.lib
  08/18/2012  05:17 PM        30,379,304 libboost_serialization-vc100-mt-gd-1_50.lib
  08/18/2012  05:25 PM           987,732 libboost_signals-vc100-mt-1_50.lib
  08/18/2012  05:18 PM         3,898,264 libboost_signals-vc100-mt-gd-1_50.lib
  08/18/2012  05:20 PM            83,032 libboost_system-vc100-mt-1_50.lib
  08/18/2012  05:19 PM           415,800 libboost_system-vc100-mt-gd-1_50.lib
  08/18/2012  05:25 PM        10,058,306 libboost_test_exec_monitor-vc100-mt-1_50.lib
  08/18/2012  05:18 PM        23,818,324 libboost_test_exec_monitor-vc100-mt-gd-1_50.lib
  08/18/2012  05:26 PM           847,252 libboost_thread-vc100-mt-1_50.lib
  08/18/2012  05:18 PM         2,633,358 libboost_thread-vc100-mt-gd-1_50.lib
  08/18/2012  05:26 PM           178,456 libboost_timer-vc100-mt-1_50.lib
  08/18/2012  05:18 PM           861,732 libboost_timer-vc100-mt-gd-1_50.lib
  08/18/2012  05:26 PM        10,943,274 libboost_unit_test_framework-vc100-mt-1_50.lib
  08/18/2012  05:18 PM        26,280,564 libboost_unit_test_framework-vc100-mt-gd-1_50.lib
  08/18/2012  05:26 PM        46,920,182 libboost_wave-vc100-mt-1_50.lib
  08/18/2012  05:19 PM        98,744,066 libboost_wave-vc100-mt-gd-1_50.lib
  08/18/2012  05:25 PM         9,000,488 libboost_wserialization-vc100-mt-1_50.lib
  08/18/2012  05:18 PM        20,631,532 libboost_wserialization-vc100-mt-gd-1_50.lib
  </code></pre>
  
  <p>As we can see, Boost was built as static libraries using Visual Studio 2010 (vc100) using the multithreaded runtime.</p>
  
  <p>Here is the output of CMake when I specify <code>-DBoost_DEBUG=1</code>:</p>
  
  <pre><code>-- Building for: Visual Studio 10
  -- Check for working C compiler using: Visual Studio 10
  -- Check for working C compiler using: Visual Studio 10 -- works
  -- Detecting C compiler ABI info
  -- Detecting C compiler ABI info - done
  -- Check for working CXX compiler using: Visual Studio 10
  -- Check for working CXX compiler using: Visual Studio 10 -- works
  -- Detecting CXX compiler ABI info
  -- Detecting CXX compiler ABI info - done
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:566 ] _boost_TEST_VERSIONS = 1.56.0;1.56;1.55.0;1.55;1.54.0;1.54;1.53.0;1.53;1.52.0;1.52;1.51.0;1.51;1.50.0;1.50;1.49.0;1.49;1.48.0;1.48;1.47.0;1.47;1.46.1;1.46.0;1.46
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:568 ] Boost_USE_MULTITHREADED = TRUE
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:570 ] Boost_USE_STATIC_LIBS =
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:572 ] Boost_USE_STATIC_RUNTIME =
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:574 ] Boost_ADDITIONAL_VERSIONS =
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:576 ] Boost_NO_SYSTEM_PATHS =
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:644 ] Declared as CMake or Environmental Variables:
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:646 ]   BOOST_ROOT = ../../boost
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:648 ]   BOOST_INCLUDEDIR =
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:650 ]   BOOST_LIBRARYDIR =
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:652 ] _boost_TEST_VERSIONS = 1.56.0;1.56;1.55.0;1.55;1.54.0;1.54;1.53.0;1.53;1.52.0;1.52;1.51.0;1.51;1.50.0;1.50;1.49.0;1.49;1.48.0;1.48;1.47.0;1.47;1.46.1;1.46.0;1.46
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:705 ] Include debugging info:
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:707 ]   _boost_INCLUDE_SEARCH_DIRS = ../../boost/include;../../boost;C:/boost/include;C:/boost;C:\Program Files (x86)/boost/include;C:\Program Files (x86)/boost;/sw/local/include
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:709 ]   _boost_PATH_SUFFIXES = boost-1_56_0;boost_1_56_0;boost-1_56;boost_1_56;boost-1_55_0;boost_1_55_0;boost-1_55;boost_1_55;boost-1_54_0;boost_1_54_0;boost-1_54;boost_1_54;boost-1_53_0;boost_1_53_0;boost-1_53;boost_1_53;boost-1_52_0;boost_1_52_0;boost-1_52;boost_1_52;boost-1_51_0;boost_1_51_0;boost-1_51;boost_1_51;boost-1_50_0;boost_1_50_0;boost-1_50;boost_1_50;boost-1_49_0;boost_1_49_0;boost-1_49;boost_1_49;boost-1_48_0;boost_1_48_0;boost-1_48;boost_1_48;boost-1_47_0;boost_1_47_0;boost-1_47;boost_1_47;boost-1_46_1;boost_1_46_1;boost-1_46_0;boost_1_46_0;boost-1_46;boost_1_46
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:734 ] location of version.hpp: C:/franz/dev/boost/boost/version.hpp
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:753 ] version.hpp reveals boost 1.50.0
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:785 ] guessed _boost_COMPILER = -vc100
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:795 ] _boost_MULTITHREADED = -mt
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:838 ] _boost_RELEASE_ABI_TAG = -
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:840 ] _boost_DEBUG_ABI_TAG = -gd
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:883 ] _boost_LIBRARY_SEARCH_DIRS = ../../boost/lib;../../boost/stage/lib;C:/franz/dev/boost/lib;C:/franz/dev/boost/../lib;C:/franz/dev/boost/stage/lib;C:/boost/lib;C:/boost;C:\Program Files (x86)/boost/boost_1_50_0/lib;C:\Program Files (x86)/boost/boost_1_50/lib;C:\Program Files (x86)/boost/lib;C:\Program Files (x86)/boost;/sw/local/lib
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:961 ] Searching for DATE_TIME_LIBRARY_RELEASE: boost_date_time-vc100-mt-1_50;boost_date_time-vc100-mt;boost_date_time-mt-1_50;boost_date_time-mt;boost_date_time
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:993 ] Searching for DATE_TIME_LIBRARY_DEBUG: boost_date_time-vc100-mt-gd-1_50;boost_date_time-vc100-mt-gd;boost_date_time-mt-gd-1_50;boost_date_time-mt-gd;boost_date_time-mt;boost_date_time
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:961 ] Searching for FILESYSTEM_LIBRARY_RELEASE: boost_filesystem-vc100-mt-1_50;boost_filesystem-vc100-mt;boost_filesystem-mt-1_50;boost_filesystem-mt;boost_filesystem
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:993 ] Searching for FILESYSTEM_LIBRARY_DEBUG: boost_filesystem-vc100-mt-gd-1_50;boost_filesystem-vc100-mt-gd;boost_filesystem-mt-gd-1_50;boost_filesystem-mt-gd;boost_filesystem-mt;boost_filesystem
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:961 ] Searching for REGEX_LIBRARY_RELEASE: boost_regex-vc100-mt-1_50;boost_regex-vc100-mt;boost_regex-mt-1_50;boost_regex-mt;boost_regex
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:993 ] Searching for REGEX_LIBRARY_DEBUG: boost_regex-vc100-mt-gd-1_50;boost_regex-vc100-mt-gd;boost_regex-mt-gd-1_50;boost_regex-mt-gd;boost_regex-mt;boost_regex
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:961 ] Searching for SYSTEM_LIBRARY_RELEASE: boost_system-vc100-mt-1_50;boost_system-vc100-mt;boost_system-mt-1_50;boost_system-mt;boost_system
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:993 ] Searching for SYSTEM_LIBRARY_DEBUG: boost_system-vc100-mt-gd-1_50;boost_system-vc100-mt-gd;boost_system-mt-gd-1_50;boost_system-mt-gd;boost_system-mt;boost_system
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:961 ] Searching for THREAD_LIBRARY_RELEASE: boost_thread-vc100-mt-1_50;boost_thread-vc100-mt;boost_thread-mt-1_50;boost_thread-mt;boost_thread
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:993 ] Searching for THREAD_LIBRARY_DEBUG: boost_thread-vc100-mt-gd-1_50;boost_thread-vc100-mt-gd;boost_thread-mt-gd-1_50;boost_thread-mt-gd;boost_thread-mt;boost_thread
  -- [ C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:1107 ] Boost_FOUND = FALSE
  CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindBoost.cmake:1191 (message):
    Unable to find the requested Boost libraries.
  
    Boost version: 1.50.0
  
    Boost include path: C:/franz/dev/boost
  
    The following Boost libraries could not be found:
  
            boost_date_time
            boost_filesystem
            boost_regex
            boost_system
            boost_thread
  
    No Boost libraries were found.  You may need to set BOOST_LIBRARYDIR to the
    directory containing Boost libraries or BOOST_ROOT to the location of
    Boost.
  Call Stack (most recent call first):
    CMakeLists.txt:114 (find_package)
  
  
  -- Found OpenGL: opengl32
  -- Looking for Q_WS_X11
  -- Looking for Q_WS_X11 - not found.
  -- Looking for Q_WS_WIN
  -- Looking for Q_WS_WIN - found
  -- Looking for Q_WS_QWS
  -- Looking for Q_WS_QWS - not found.
  -- Looking for Q_WS_MAC
  -- Looking for Q_WS_MAC - not found.
  -- Found Qt4: C:/franz/dev/qt-4.8.0/bin/qmake.exe (found version "4.8.0")
  -- Configuring incomplete, errors occurred!
  </code></pre>
  
  <p>Here is the section in the top level CMakeLists.txt file that deals with Boost: <a href="https://github.com/jupiter-jazz/appleseed/blob/95b045bf06c731cd331d68f6c2515f1acefc1b42/src/CMakeLists.txt#L100" rel="nofollow noreferrer">https://github.com/jupiter-jazz/appleseed/blob/95b045bf06c731cd331d68f6c2515f1acefc1b42/src/CMakeLists.txt#L100</a></p>
  
  <p>I have also tried to specify <code>BOOST_LIBRARYDIR</code> instead of <code>BOOST_ROOT</code>, to no avail.</p>
  
  <p><strong>Again, this has been working flawlessly for years on many variants of Windows, Linux and Mac OS X. I am looking for the reason why it suddently stopped working.</strong></p>