Garbage-collect Gnulib sources

Remove Gnulib sources no longer needed or used.
admin/merge-gnulib is typically not smart enough to do that.
* configure.ac: Do not call gl_EEMALLOC, as it is no longer
supplied or needed.
* lib/explicit_bzero.c, lib/malloc/scratch_buffer_dupfree.c:
* lib/xalloc-oversized.h, m4/eealloc.m4, m4/explicit_bzero.m4:
* m4/st_dm_mode.m4, m4/year2038.m4:
Remove.

1 files changed, 0 insertions, 74 deletions

diff --git a/lib/explicit_bzero.c b/lib/explicit_bzero.c
deleted file mode 100644
index 59d9895abfe..00000000000
--- a/lib/explicit_bzero.c
+++ /dev/null
@@ -1,74 +0,0 @@
-/* Erasure of sensitive data, generic implementation.
-   Copyright (C) 2016-2025 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-/* An assembler implementation of explicit_bzero can be created as an
-   assembler alias of an optimized bzero implementation.
-   Architecture-specific implementations also need to define
-   __explicit_bzero_chk.  */
-
-#if !_LIBC
-# include <config.h>
-#endif
-
-/* memset_s need this define */
-#if HAVE_MEMSET_S
-# define __STDC_WANT_LIB_EXT1__ 1
-#endif
-
-#include <string.h>
-
-#if defined _WIN32 && !defined __CYGWIN__
-# define  WIN32_LEAN_AND_MEAN
-# include <windows.h>
-#endif
-
-#if _LIBC
-/* glibc-internal users use __explicit_bzero_chk, and explicit_bzero
-   redirects to that.  */
-# undef explicit_bzero
-#endif
-
-/* Set LEN bytes of S to 0.  The compiler will not delete a call to
-   this function, even if S is dead after the call.  */
-void
-explicit_bzero (void *s, size_t len)
-{
-#if defined _WIN32 && !defined __CYGWIN__
-  (void) SecureZeroMemory (s, len);
-#elif HAVE_EXPLICIT_MEMSET
-  explicit_memset (s, '\0', len);
-#elif HAVE_MEMSET_S
-  (void) memset_s (s, len, '\0', len);
-#elif defined __GNUC__ && !defined __clang__
-  memset (s, '\0', len);
-  /* Compiler barrier.  */
-  asm volatile ("" ::: "memory");
-#elif defined __clang__
-  memset (s, '\0', len);
-  /* Compiler barrier.  */
-  /* With asm ("" ::: "memory") LLVM analyzes uses of 's' and finds that the
-     whole thing is dead and eliminates it.  Use 'g' to work around this
-     problem.  See <https://bugs.llvm.org/show_bug.cgi?id=15495#c11>.  */
-  __asm__ volatile ("" : : "g"(s) : "memory");
-#else
-  /* Invoke memset through a volatile function pointer.  This defeats compiler
-     optimizations.  */
-  void * (* const volatile volatile_memset) (void *, int, size_t) = memset;
-  (void) volatile_memset (s, '\0', len);
-#endif
-}