The problem still remains when installing the gcc proposed in bug: 18855

The compiler can be set via the toolset option: http://www.boost.org/build/doc/html/bbv2/overview/invocation.html

It that doesn't work alone, we might need to set the standard library according to this stackoverflow thread: http://stackoverflow.com/questions/8486077/how-to-compile-link-boost-with-clang-libc

It seems to be fixed by using appropriate (different) values for --with-toolset and --toolset options for building the build engine and boost itself. The build engine only knows gcc for example. For building boost a version can be specified. In Boost.cmake add something like:

if(UNIX)

if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
  set(_boost_toolset "gcc")
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
  set(_boost_toolset "clang")
else()
  message(FATAL_ERROR "Compiler '${CMAKE_CXX_COMPILER_ID}' not supported. Use GNU or Clang instead.")
endif()
string(REGEX MATCH "^[0-9]+\\.[0-9]+" _compiler_version "${CMAKE_CXX_COMPILER_VERSION}")
set(_boost_toolset_with_version "${_boost_toolset}-${_compiler_version}")

endif()

And then use it for the build_cmd, e.g.:

--toolset=${_boost_toolset_with_version}

User kislinsk has pushed new remote branch:

bug-18885-BoostToolset

[f1213e]: Merge branch 'bug-18885-BoostToolset'

Merged commits:

2015-04-09 02:25:26 Stefan Kislinskiy [69f94c]
Use versioned toolset for building Boost.

User kislinsk has pushed new remote branch:

bug-18885-FixAppleClang

[2c19c9]: Merge branch 'bug-18885-FixAppleClang'

Merged commits:

2015-04-09 13:05:28 Stefan Kislinskiy [8dd97c]
COMP: Handle Apple separately.

User kislinsk has pushed new remote branch:

bug-18885-FixWrongVarName

[01a2f9]: Merge branch 'bug-18885-FixWrongVarName'

Merged commits:

2015-04-09 14:17:00 Stefan Kislinskiy [6f015b]
COMP: Fixed wrong variable name.

User kislinsk has pushed new remote branch:

bug-18885-FixITKExternalProjectScript

[ba0c6c]: Merge branch 'bug-18885-FixITKExternalProjectScript'

Merged commits:

2015-04-09 14:50:13 Stefan Kislinskiy [72a471]
COMP: VCL constexpr patch is also needed for GCC 4.7.