Hi, when the free-standing libstdc++-headers are installed, the C++ header file does not always compile, because it includes and this includes under certain conditions (__cplusplus >= 201103L && ATOMIC_INT_LOCK_FREE > 1) the header file but that fails to compile because it needs which is not installed. This condition depends on the target, and for instance an arm-eabi eCos compiler fails to compile with -mcpu=cortex-a9 and the default C++ standard option, while it is OK with ARMv4 CPUs. Therefore this patch adds move.h and concept_check.h to the installed headers, unconditionally. I've verified that the header compiles on an eCos cross compiler. Boot-strapped and regression-tested on x86_64-pc-linux-gnu. Is it OK for trunk? Thanks Bernd.