-AC_LANG_PUSH([C++])
-AC_CHECK_HEADERS([boost/shared_ptr.hpp], [],
- [AC_MSG_ERROR(You need the Boost libraries.)])
-AC_CHECK_HEADERS([boost/enable_shared_from_this.hpp], [],
- [AC_MSG_ERROR(You need the Boost libraries.)])
-AC_LANG_POP([C++])
-
-CXXFLAGS="-fPIC -Wall -Wextra $CXXFLAGS"