setserial: undrop, adopt and fix build

pkgs/by-name/se/setserial/gcc-fixes.patch

@@ -0,0 +1,31 @@
+diff --git a/setserial.c b/setserial.c
+index fef6532768..b7cde26ac2 100644
+--- a/setserial.c
++++ b/setserial.c
+@@ -10,11 +10,14 @@
+  * Last modified: [tytso:19940520.0036EDT]
+  */
+ 
++#include <errno.h>
++#include <fcntl.h>
+ #include <stdio.h>
+-#include <fcntl.h>
++#include <stdlib.h>
++#include <string.h>
+ #include <termios.h>
+-#include <string.h>
+-#include <errno.h>
++#include <unistd.h>
++#include <sys/ioctl.h>
+ 
+ #ifdef HAVE_ASM_IOCTLS_H
+ #include <asm/ioctls.h>
+@@ -714,7 +717,7 @@
+ 	exit(1);
+ }
+ 
+-main(int argc, char **argv)
++int main(int argc, char **argv)
+ {
+ 	int	get_flag = 0, wild_intr_flag = 0;
+ 	int	c;

pkgs/by-name/se/setserial/package.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  stdenv,
+  fetchurl,
+  groff,
+  autoreconfHook,
+}:
+
+stdenv.mkDerivation rec {
+  pname = "setserial";
+  version = "2.17";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/setserial/${pname}-${version}.tar.gz";
+    sha256 = "0jkrnn3i8gbsl48k3civjmvxyv9rbm1qjha2cf2macdc439qfi3y";
+  };
+
+  patches = [ ./gcc-fixes.patch ];
+
+  nativeBuildInputs = [
+    autoreconfHook
+    groff
+  ];
+
+  postConfigure = ''
+    substituteInPlace Makefile \
+      --replace-fail /usr/man/ /share/man/ \
+      --replace-fail DESTDIR out
+  '';
+
+  preInstall = ''
+    mkdir -p "$out/bin" "$out/share/man/man8"
+  '';
+
+  meta = {
+    description = "Serial port configuration utility";
+    homepage = "https://setserial.sourceforge.net";
+    platforms = lib.platforms.linux;
+    license = lib.licenses.gpl2Only;
+    maintainers = [ lib.maintainers.mmlb ];
+  };
+}

pkgs/top-level/aliases.nix

@@ -1439,7 +1439,6 @@ mapAliases {
   sequoia = throw "'sequoia' has been renamed to/replaced by 'sequoia-sq'"; # Converted to throw 2025-10-27
   serverless = throw "'serverless' has been removed because version 3.x is unmaintained upstream and vulnerable, and version 4.x lacks a suitable binary or source download."; # Added 2025-11-22
   session-desktop-appimage = throw "'session-desktop-appimage' has been renamed to/replaced by 'session-desktop'"; # Converted to throw 2025-10-27
-  setserial = throw "'setserial' has been removed as it had been abandoned upstream"; # Added 2025-05-18
   sexp = throw "'sexp' has been renamed to/replaced by 'sexpp'"; # Converted to throw 2025-10-27
   shadered = throw "shadered has been removed because it has been marked as broken since at least November 2024."; # Added 2025-10-01
   shared_desktop_ontologies = throw "'shared_desktop_ontologies' has been removed as it had been abandoned upstream"; # Added 2025-11-09