2012-10-05  Marc Glisse  <marc.glisse@inria.fr>

	PR libstdc++/54686
	* include/c_std/cstdlib (abs(long long)): Define with
	__builtin_llabs when we have long long.
	(abs(long)): Use __builtin_labs.
	(abs(__int128)): Define when we have __int128.
	* testsuite/26_numerics/headers/cstdlib/54686.c: New file.

From-SVN: r192132