perlPackages.IOTty: Fix build on Darwin

Co-authored-by: Stig <git@stig.io>

pkgs/development/perl-modules/IO-Tty-fix-makefile.patch

@@ -0,0 +1,13 @@
+diff --git a/Makefile.PL b/Makefile.PL
+index eaf47e0..32766d7 100644
+--- a/Makefile.PL
++++ b/Makefile.PL
+@@ -146,7 +146,7 @@ extern "C"
+ /* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+ char $f ();
+-char (*f) ();
++char f;
+ 
+ #ifdef F77_DUMMY_MAIN
+ #  ifdef __cplusplus

pkgs/top-level/perl-packages.nix

@@ -12950,6 +12950,7 @@ with self; {
       url = "mirror://cpan/authors/id/T/TO/TODDR/IO-Tty-1.17.tar.gz";
       hash = "sha256-pfGoMCC8W13WwbVw9Ix1RuCo9/rBCgaHQLA5Ja2eFOg=";
     };
+    patches = [ ../development/perl-modules/IO-Tty-fix-makefile.patch ];
     doCheck = !stdenv.isDarwin;  # openpty fails in the sandbox
     meta = {
       description = "Low-level allocate a pseudo-Tty, import constants";