FreeBSD/Cmake/Boost: Build with SYSTEM Boost on FreeBSD

 - The in tree Boost needs patching to be FreeBSD compatible.
   Which is not trivial ATM.
 - And set the required version to 1.5 since forwarding it to
   1.161 requires quite some labour in patching the package

Signed-off-by: Willem Jan Withagen <wjw@digiware.nl>

CMakeLists.txt

@@ -461,7 +461,12 @@ if(WITH_MGR)
 endif()
 
 # require minimally the bundled version
-find_package(Boost 1.61 COMPONENTS thread system regex random program_options date_time iostreams REQUIRED)
+if (NOT FREEBSD)
+  find_package(Boost 1.61 COMPONENTS thread system regex random program_options date_time iostreams REQUIRED)
+else
+  # FreeBSD currently packages 1.55, forwarding is less than trivial
+  find_package(Boost 1.55 COMPONENTS thread system regex random program_options date_time iostreams REQUIRED)
+endif()
 include_directories(${Boost_INCLUDE_DIRS})
 include_directories(${PROJECT_BINARY_DIR}/include)
 

do_freebsd.sh

@@ -15,6 +15,7 @@ rm -rf build && ./do_cmake.sh "$*" \
 	-D CMAKE_CXX_FLAGS_DEBUG="-O0 -g" \
 	-D CMAKE_C_FLAGS_DEBUG="-O0 -g" \
 	-D ENABLE_GIT_VERSION=OFF \
+        -D WITH_SYSTEM_BOOST=ON \
 	-D WITH_BLKID=OFF \
 	-D WITH_LTTNG=OFF \
 	-D WITH_FUSE=OFF \