Ports: Add libmad

Ports/libmad/package.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env -S bash ../.port_include.sh
+port=libmad
+version=0.15.1b
+useconfigure=true
+use_fresh_config_sub=true
+configopts=("--disable-static")
+files="https://downloads.sourceforge.net/mad/libmad-${version}.tar.gz libmad-${version}.tar.gz bbfac3ed6bfbc2823d3775ebb931087371e142bb0e9bb1bee51a76a6e0078690"
+auth_type=sha256

Ports/libmad/patches/0001-Remove-fforce-mem-GCC-argument.patch

@@ -0,0 +1,26 @@
+From dda7e4b915bfa0d1e93e021c2c9ee050e4390b6e Mon Sep 17 00:00:00 2001
+From: Jelle Raaijmakers <jelle@gmta.nl>
+Date: Mon, 17 Jan 2022 17:23:17 +0100
+Subject: [PATCH] Remove `-fforce-mem` GCC argument
+
+This is no longer supported by GCC.
+---
+ configure | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure b/configure
+index ee421cc..ccb5928 100755
+--- a/configure
++++ b/configure
+@@ -19099,7 +19099,7 @@ then
+     case "$optimize" in
+ 	-O|"-O "*)
+ 	    optimize="-O"
+-	    optimize="$optimize -fforce-mem"
++	    #optimize="$optimize -fforce-mem"
+ 	    optimize="$optimize -fforce-addr"
+ 	    : #x optimize="$optimize -finline-functions"
+ 	    : #- optimize="$optimize -fstrength-reduce"
+-- 
+2.32.0
+

Ports/libmad/patches/ReadMe.md

@@ -0,0 +1,8 @@
+# Patches for libmad on SerenityOS
+
+## `0001-Remove-fforce-mem-GCC-argument.patch`
+
+Remove `-fforce-mem` GCC argument
+
+This is no longer supported by GCC.
+