vcontainer: add SDK-based standalone tarball

Add vcontainer-tarball.bb recipe that creates a relocatable standalone
distribution of vdkr and vpdmn container tools using Yocto SDK infrastructure.

Features:
- Auto-detects available architectures from built blobs
- Custom SDK installer with vcontainer-specific messages
- nativesdk-qemu-vcontainer.bb: minimal QEMU without OpenGL deps

Recipe changes:
- DELETE vdkr-native_1.0.bb (functionality moved to SDK)
- DELETE vpdmn-native_1.0.bb (functionality moved to SDK)
- ADD vcontainer-tarball.bb (SDK tarball recipe)
- ADD toolchain-shar-extract.sh (SDK installer template)
- ADD nativesdk-qemu-vcontainer.bb (minimal QEMU for SDK)

Usage:
  MACHINE=qemux86-64 bitbake vcontainer-tarball
  ./tmp/deploy/sdk/vcontainer-standalone.sh -d /opt/vcontainer -y
  source /opt/vcontainer/init-env.sh
  vdkr images

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/recipes-devtools/qemu/nativesdk-qemu-vcontainer.bb b/recipes-devtools/qemu/nativesdk-qemu-vcontainer.bb
new file mode 100644
index 00000000..8fc68679
--- /dev/null
+++ b/recipes-devtools/qemu/nativesdk-qemu-vcontainer.bb
@@ -0,0 +1,65 @@
+# SPDX-FileCopyrightText: Copyright (C) 2025 Bruce Ashfield
+#
+# SPDX-License-Identifier: MIT
+#
+# Minimal QEMU variant for vcontainer tools (vdkr/vpdmn)
+#
+# This recipe provides a stripped-down nativesdk QEMU without OpenGL/SDL
+# dependencies, avoiding the mesa -> llvm -> clang build chain.
+#
+# This is separate from the main nativesdk-qemu to avoid affecting other
+# users who may need OpenGL support in their SDK QEMU.
+#
+# VERSION TRACKING: This recipe automatically discovers the QEMU version
+# from oe-core, so no updates are needed when oe-core bumps QEMU.
+
+SUMMARY = "Minimal QEMU for vcontainer tools"
+DESCRIPTION = "QEMU built without OpenGL/virglrenderer for use in vcontainer \
+               standalone tarballs. Avoids pulling in mesa/llvm/clang."
+
+# Dynamically discover QEMU version from oe-core (same pattern as busybox-initrd.bb)
+def get_qemu_pv(d):
+    import os
+    import re
+    corebase = d.getVar('COREBASE')
+    qemu_dir = os.path.join(corebase, 'meta', 'recipes-devtools', 'qemu')
+    if os.path.isdir(qemu_dir):
+        re_bb_name = re.compile(r"^qemu_([0-9.]+)\.bb$")
+        for bb_file in os.listdir(qemu_dir):
+            result = re_bb_name.match(bb_file)
+            if result:
+                return result.group(1)
+    bb.fatal("Cannot find qemu recipe in %s" % qemu_dir)
+
+PV := "${@get_qemu_pv(d)}"
+
+# Point to oe-core qemu files directory for patches and support files
+FILESEXTRAPATHS:prepend := "${COREBASE}/meta/recipes-devtools/qemu/qemu:"
+
+# Use the same base as oe-core qemu
+require recipes-devtools/qemu/qemu.inc
+
+# Pull in the main recipe's dependencies and settings
+DEPENDS += "glib-2.0 zlib pixman"
+DEPENDS:append:libc-musl = " libucontext"
+
+# Inherit nativesdk explicitly (not via BBCLASSEXTEND)
+inherit nativesdk
+
+# Target list for nativesdk (cross-prefix is already set by qemu.inc for class-nativesdk)
+EXTRA_OECONF:append = " --target-list=${@get_qemu_target_list(d)}"
+
+# Minimal PACKAGECONFIG - no opengl, no sdl, no virglrenderer
+# This avoids mesa -> llvm -> clang dependency chain
+# virtfs is needed for volume mounts (-v host:container)
+PACKAGECONFIG = "fdt kvm pie slirp virtfs"
+
+# Only build the QEMU targets we actually need for vcontainer
+# This saves ~150MB compared to building all architectures
+QEMU_TARGETS = "aarch64 x86_64"
+
+# QEMU's configure doesn't support --disable-static, so disable it
+DISABLE_STATIC = ""
+
+# Ensure proper naming
+BPN = "qemu"