Ports: Add a QEMU port

Ports/qemu/patches/0001-Add-build-system-support-for-SerenityOS.patch

@@ -0,0 +1,40 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Tim Schumacher <timschumi@gmx.de>
+Date: Thu, 5 May 2022 18:49:17 +0200
+Subject: [PATCH] Add build system support for SerenityOS
+
+---
+ configure | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/configure b/configure
+index 7c08c18..3177605 100755
+--- a/configure
++++ b/configure
+@@ -496,6 +496,8 @@ elif check_define __NetBSD__; then
+   targetos=netbsd
+ elif check_define __APPLE__; then
+   targetos=darwin
++elif check_define __serenity__; then
++  targetos=serenity
+ else
+   # This is a fatal error, but don't report it yet, because we
+   # might be going to just print the --help text, or it might
+@@ -509,6 +511,7 @@ mingw32="no"
+ bsd="no"
+ linux="no"
+ solaris="no"
++serenity="no"
+ case $targetos in
+ windows)
+   mingw32="yes"
+@@ -565,6 +568,9 @@ linux)
+   linux="yes"
+   vhost_user=${default_feature:-yes}
+ ;;
++serenity)
++  serenity="yes"
++;;
+ esac
+ 
+ if test ! -z "$cpu" ; then

Ports/qemu/patches/0002-Extend-short-scan-sets-into-the-full-list.patch

@@ -0,0 +1,29 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Tim Schumacher <timschumi@gmx.de>
+Date: Thu, 5 May 2022 18:50:31 +0200
+Subject: [PATCH] Extend short scan sets into the full list
+
+We don't support the (apparently nonstandard) short variant of scan
+sets, so extend them into a full list manually.
+---
+ chardev/char.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/chardev/char.c b/chardev/char.c
+index 0169d8d..03ce487 100644
+--- a/chardev/char.c
++++ b/chardev/char.c
+@@ -382,11 +382,11 @@ QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename,
+     if (strstart(filename, "vc", &p)) {
+         qemu_opt_set(opts, "backend", "vc", &error_abort);
+         if (*p == ':') {
+-            if (sscanf(p+1, "%7[0-9]x%7[0-9]", width, height) == 2) {
++            if (sscanf(p+1, "%7[0123456789]x%7[0123456789]", width, height) == 2) {
+                 /* pixels */
+                 qemu_opt_set(opts, "width", width, &error_abort);
+                 qemu_opt_set(opts, "height", height, &error_abort);
+-            } else if (sscanf(p+1, "%7[0-9]Cx%7[0-9]C", width, height) == 2) {
++            } else if (sscanf(p+1, "%7[0123456789]Cx%7[0123456789]C", width, height) == 2) {
+                 /* chars */
+                 qemu_opt_set(opts, "cols", width, &error_abort);
+                 qemu_opt_set(opts, "rows", height, &error_abort);

Ports/qemu/patches/ReadMe.md

@@ -0,0 +1,14 @@
+# Patches for qemu on SerenityOS
+
+## `0001-Add-build-system-support-for-SerenityOS.patch`
+
+Add build system support for SerenityOS
+
+
+## `0002-Extend-short-scan-sets-into-the-full-list.patch`
+
+Extend short scan sets into the full list
+
+We don't support the (apparently nonstandard) short variant of scan
+sets, so extend them into a full list manually.
+