* lib/careadlinkat.c (_GL_USE_STDLIB_ALLOC): Define.
(malloc, realloc): Don't #undef; no longer needed.
* lib/malloca.c (_GL_USE_STDLIB_ALLOC, malloc): Likewise.
+ * lib/progreloc.c (_GL_USE_STDLIB_ALLOC, malloc): Likewise.
careadlinkat: rename members to avoid problem
* lib/allocator.h (struct allocator): Rename members from