# 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"