careadlinkat: stop exporting careadlinkatcwd

Only Emacs used it directly, and Emacs no longer needs it.
* NEWS: Document this simplification.
* lib/areadlink.c (careadlinkatcwd): Move here from careadlinkat.c,
and make it static.  Include <stdlib.h>, for abort, and unistd.h,
for readlink.
* lib/careadlinkat.c (careadlinkatcwd): Move to areadlink.c.
Don't include stdlib.h; no longer needed.
* lib/careadlinkat.h (careadlinkatcwd): Remove decl.
* lib/relocwrapper.c: Adjust comment to match new dependencies.
* modules/areadlink (Depends-on): Add readlink.
(Maintainer): Add self.
* modules/careadlinkat (Depends-on): Remove readlink.

1 files changed, 2 insertions, 7 deletions

diff --git a/lib/careadlinkat.h b/lib/careadlinkat.h
index 5cdb813fed..46f88ae288 100644
--- a/lib/careadlinkat.h
+++ b/lib/careadlinkat.h
@@ -52,21 +52,16 @@ char *careadlinkat (int fd, char const *filename,
                     ssize_t (*preadlinkat) (int, char const *,
                                             char *, size_t));
 
-/* Suitable values for careadlinkat's FD and PREADLINKAT arguments,
-   when doing a plain readlink:
-   Pass FD = AT_FDCWD and PREADLINKAT = careadlinkatcwd.  */
+/* Suitable value for careadlinkat's FD argument.  */
 #if HAVE_READLINKAT
 /* AT_FDCWD is declared in <fcntl.h>.  */
 #else
 /* Define AT_FDCWD independently, so that the careadlinkat module does
-   not depend on the fcntl-h module.  The value does not matter, since
-   careadlinkatcwd ignores it, but we might as well use the same value
+   not depend on the fcntl-h module.  We might as well use the same value
    as fcntl-h.  */
 # ifndef AT_FDCWD
 #  define AT_FDCWD (-3041965)
 # endif
 #endif
-ssize_t careadlinkatcwd (int fd, char const *filename,
-                         char *buffer, size_t buffer_size);
 
 #endif /* _GL_CAREADLINKAT_H */