Ports: Add a QEMU port

Ports/qemu/package.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env -S bash ../.port_include.sh
+port='qemu'
+version='7.0.0'
+useconfigure='true'
+configopts=(
+    "--target-list=aarch64-softmmu,i386-softmmu,x86_64-softmmu"
+    "--cross-prefix=${SERENITY_ARCH}-pc-serenity-"
+    "--extra-ldflags=-lm"
+    "--without-default-features"
+    "--disable-strip"
+    "--enable-pie"
+    "--enable-sdl"
+    "--enable-tcg"
+    "--enable-tools"
+)
+depends=("glib" "pixman" "SDL2")
+files="https://download.qemu.org/qemu-${version}.tar.xz qemu-${version}.tar.xz f6b375c7951f728402798b0baabb2d86478ca53d44cedbefabbe1c46bf46f839"
+auth_type='sha256'
+
+pre_patch() {
+    # Disable tests (those need way more stuff than QEMU itself) by clearing the respective meson file.
+    echo '' > "${workdir}/tests/meson.build"
+}
+
+post_install() {
+    # Add a drop-in fstab entry to make sure that we can use anonymous executable memory and bypass W^X
+    mkdir -p "${SERENITY_INSTALL_ROOT}/etc/fstab.d"
+    rm -rf "${SERENITY_INSTALL_ROOT}/etc/fstab.d/qemu"
+    for i in /usr/local/bin/qemu-system-{aarch64,i386,x86_64}; do
+        echo "${i}	${i}	bind	bind,wxallowed,axallowed" >> "${SERENITY_INSTALL_ROOT}/etc/fstab.d/qemu"
+    done
+}
+
+# We don't have '<arch>-pc-serenity-pkg-config', so just use the "normal" one.
+export PKG_CONFIG="pkg-config"