-# Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
-check_func nanosleep || { check_func nanosleep -lrt && add_extralibs -lrt; }
+check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
+check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
+check_builtin MemoryBarrier windows.h "MemoryBarrier()"
+check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
+
+check_func_headers malloc.h _aligned_malloc && enable aligned_malloc
+check_func ${malloc_prefix}memalign && enable memalign
+check_func ${malloc_prefix}posix_memalign && enable posix_memalign