std: remove meta.globalOption

lib/std/crypto/tlcsprng.zig

@@ -35,7 +35,7 @@ const os_has_fork = switch (builtin.os.tag) {
 };
 const os_has_arc4random = builtin.link_libc and @hasDecl(std.c, "arc4random_buf");
 const want_fork_safety = os_has_fork and !os_has_arc4random and
-    (std.meta.globalOption("crypto_fork_safety", bool) orelse true);
+    std.options.crypto_fork_safety;
 const maybe_have_wipe_on_fork = builtin.os.isAtLeast(.linux, .{
     .major = 4,
     .minor = 14,

lib/std/meta.zig

@@ -1099,13 +1099,6 @@ test "ArgsTuple forwarding" {
     }
 }
 
-/// TODO: https://github.com/ziglang/zig/issues/425
-pub fn globalOption(comptime name: []const u8, comptime T: type) ?T {
-    if (!@hasDecl(root, name))
-        return null;
-    return @as(T, @field(root, name));
-}
-
 /// Returns whether `error_union` contains an error.
 pub fn isError(error_union: anytype) bool {
     return if (error_union) |_| false else |_| true;

lib/std/std.zig

@@ -264,6 +264,11 @@ pub const options = struct {
     else
         false;
 
+    pub const crypto_fork_safety: bool = if (@hasDecl(options_override, "crypto_fork_safety"))
+        options_override.crypto_fork_safety
+    else
+        true;
+
     /// By default Zig disables SIGPIPE by setting a "no-op" handler for it.  Set this option
     /// to `true` to prevent that.
     ///