Remove Gnulib explicit_bzero module

It’s no longer needed, as it is now merely a thin layer around
C23-style memset_explicit and we might as well just call the
C23 standard function; that’s more forward-looking.
* admin/merge-gnulib (GNULIB_MODULES):
Remove explicit_bzero, and add memset_explicit.
* lib/explicit_bzero.c, m4/explicit_bzero.m4:
Remove these files, which were copied from Gnulib.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
* src/gnutls.c (gnutls_symmetric_aead):
Use memset_explicit instead of explicit_bzero.

2 files changed, 0 insertions, 23 deletions

diff --git a/m4/explicit_bzero.m4 b/m4/explicit_bzero.m4
deleted file mode 100644
index 6c0d4c23368..00000000000
--- a/m4/explicit_bzero.m4
+++ /dev/null
@@ -1,17 +0,0 @@
-dnl Copyright 2017-2022 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_FUNC_EXPLICIT_BZERO],
-[
-  AC_REQUIRE([gl_STRING_H_DEFAULTS])
-
-  dnl Persuade glibc <string.h> to declare explicit_bzero.
-  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-
-  AC_CHECK_FUNCS_ONCE([explicit_bzero])
-  if test $ac_cv_func_explicit_bzero = no; then
-    HAVE_EXPLICIT_BZERO=0
-  fi
-])
diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
index 97d0a7d21f8..9ba977711fa 100644
--- a/m4/gnulib-comp.m4
+++ b/m4/gnulib-comp.m4
@@ -82,7 +82,6 @@ AC_DEFUN([gl_EARLY],
   # Code from module errno:
   # Code from module euidaccess:
   # Code from module execinfo:
-  # Code from module explicit_bzero:
   # Code from module extensions:
   # Code from module extern-inline:
   # Code from module faccessat:
@@ -286,9 +285,6 @@ AC_DEFUN([gl_INIT],
   gl_CONDITIONAL_HEADER([execinfo.h])
   AC_PROG_MKDIR_P
   gl_CONDITIONAL([GL_COND_OBJ_EXECINFO], [$GL_GENERATE_EXECINFO_H])
-  gl_FUNC_EXPLICIT_BZERO
-  gl_CONDITIONAL([GL_COND_OBJ_EXPLICIT_BZERO], [test $HAVE_EXPLICIT_BZERO = 0])
-  gl_STRING_MODULE_INDICATOR([explicit_bzero])
   AC_REQUIRE([gl_EXTERN_INLINE])
   gl_FUNC_FACCESSAT
   gl_CONDITIONAL([GL_COND_OBJ_FACCESSAT],
@@ -1252,7 +1248,6 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/euidaccess.c
   lib/execinfo.c
   lib/execinfo.in.h
-  lib/explicit_bzero.c
   lib/faccessat.c
   lib/fchmodat.c
   lib/fcntl.c
@@ -1437,7 +1432,6 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/errno_h.m4
   m4/euidaccess.m4
   m4/execinfo.m4
-  m4/explicit_bzero.m4
   m4/extensions.m4
   m4/extern-inline.m4
   m4/faccessat.m4