missing_stdlib: secure_getenv() exists since glibc-2.17

meson.build

@@ -598,10 +598,6 @@ endforeach
 
 conf.set10('WANT_LINUX_FS_H', want_linux_fs_h)
 
-foreach ident : ['secure_getenv', '__secure_getenv']
-        conf.set10('HAVE_' + ident.to_upper(), cc.has_function(ident))
-endforeach
-
 foreach ident : [
         ['fchmodat2',         '''#include <stdlib.h>
                                  #include <fcntl.h>'''],      # no known header declares fchmodat2

src/basic/missing_stdlib.h

@@ -1,13 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-#pragma once
-
-#include <stdlib.h>
-
-/* stdlib.h */
-#if !HAVE_SECURE_GETENV
-#  if HAVE___SECURE_GETENV
-#    define secure_getenv __secure_getenv
-#  else
-#    error "neither secure_getenv nor __secure_getenv are available"
-#  endif
-#endif

src/shared/libcrypt-util.c

@@ -24,7 +24,6 @@
 #include "log.h"
 #include "macro.h"
 #include "memory-util.h"
-#include "missing_stdlib.h"
 #include "random-util.h"
 #include "string-util.h"
 #include "strv.h"