From aaed7211b2a6e7ebadb878603a0fa18d85d8be59 Mon Sep 17 00:00:00 2001
From: "Dustin C. Hatch" <dustin@hatch.name>
Date: Thu, 12 Dec 2024 18:02:16 -0600
Subject: [PATCH] build: Install QEMU

Although most software can be cross-compiled, there are quite a few edge
cases where executables built for the target system need to be run on
the build host.  Notably, `ldconfig` only considers libraries for the
same machine type as the tool itself, so it's impossible to run it in a
cross-compiled root.  In order to get passed these situations, we can
use QEMU in user mode to emulate the target architecture, allowing ARM
executables to run on AMD64 machines.
---
 lib/tools.sh             | 1 +
 portage/package.use/qemu | 5 +++++
 2 files changed, 6 insertions(+)
 create mode 100644 portage/package.use/qemu

diff --git a/lib/tools.sh b/lib/tools.sh
index 3fe5b5c..77983ca 100755
--- a/lib/tools.sh
+++ b/lib/tools.sh
@@ -5,6 +5,7 @@ sys-apps/shadow
 EOF
 
 xargs -r emerge -vnuUj --rebuilt-binaries=y --color=y <<EOF
+app-emulation/qemu
 sec-policy/selinux-base
 sys-apps/policycoreutils
 sys-apps/kmod
diff --git a/portage/package.use/qemu b/portage/package.use/qemu
new file mode 100644
index 0000000..ab67f81
--- /dev/null
+++ b/portage/package.use/qemu
@@ -0,0 +1,5 @@
+# vim: set ft=gentoo-package-use :
+
+# Dustin C. Hatch <dustin@hatch.name> (11 Dec 2024)
+# Build a minimal QEMU for chrooting into the target environment
+app-emulation/qemu -* QEMU_USER_TARGETS: aarch64 PYTHON_TARGETS: python3_12