Merge pull request #924 from VorpalBlade/feature/boost-timer-optional

Implement issue #923: Make boost timer optional

Author: redboltz

CMakeLists.txt

@@ -83,7 +83,7 @@ OPTION (MSGPACK_BUILD_EXAMPLES "Build msgpack examples." ON)
 
 SET (Boost_USE_MULTITHREADED      ON)
 SET (Boost_USE_STATIC_RUNTIME    OFF)
-FIND_PACKAGE (Boost REQUIRED COMPONENTS chrono system timer)
+FIND_PACKAGE (Boost REQUIRED COMPONENTS chrono system OPTIONAL_COMPONENTS timer)
 
 INCLUDE_DIRECTORIES (
    ${Boost_INCLUDE_DIRS}

appveyor.yml

@@ -48,7 +48,7 @@ build_script:
       cd ..
       cd ..
       if ($env:msvc -ne '"Visual Studio 14 2015"') {
-        ((Get-Content CMakeLists.txt) -replace "COMPONENTS chrono system timer", "") | Set-Content -Path CMakeLists.txt
+        ((Get-Content CMakeLists.txt) -replace "COMPONENTS chrono system OPTIONAL_COMPONENTS timer", "") | Set-Content -Path CMakeLists.txt
       }
       md build
       cd build

example/cpp03/CMakeLists.txt

@@ -22,10 +22,12 @@ IF (NOT MSVC)
     )
 ENDIF ()
 
-LIST (APPEND with_boost_lib_PROGRAMS
-    speed_test.cpp
-    speed_test_nested_array.cpp
-)
+if (Boost_TIMER_LIBRARY)
+    LIST (APPEND with_boost_lib_PROGRAMS
+        speed_test.cpp
+        speed_test_nested_array.cpp
+    )
+endif()
 
 FOREACH (source_file ${exec_PROGRAMS})
     GET_FILENAME_COMPONENT (source_file_we ${source_file} NAME_WE)