#!/usr/bin/env bash
# Builds libostream_repro.so for armeabi-v7a via the NDK's CMake toolchain
# file - standalone, deliberately outside the Gradle build, same pattern as
# ../trace_agent/build.sh. Output: build/libostream_repro.so, ready to push
# to a device for GuestEngine::LoadSecondaryImage to load (see
# mpcore/src/main/cpp/emu/ostream_repro_test.cpp).
set -euo pipefail
cd "$(dirname "$0")"

NDK="${ANDROID_NDK_HOME:-/home/megboyzz/Android/Sdk/ndk/27.0.12077973}"
TOOLCHAIN="$NDK/build/cmake/android.toolchain.cmake"

if [ ! -f "$TOOLCHAIN" ]; then
    echo "NDK toolchain file not found at $TOOLCHAIN - set ANDROID_NDK_HOME" >&2
    exit 1
fi

# ANDROID_STL=c++_static explicitly - see ostream_repro.cpp's own top
# comment for the full reasoning (tried c++_shared FIRST, actually built
# and inspected both outcomes with llvm-readelf before deciding, not
# guessed): the modern NDK r27 toolchain's libc++ headers extern-template-
# declare basic_stringbuf<char>/basic_ostream<char>/basic_ios<char>/
# basic_ostringstream<char> (their vtables AND ctors/dtors become UNDEFINED
# imports resolved against libc++_shared.so, confirmed via
# `llvm-readelf --dyn-syms` on a real c++_shared build of this exact file),
# which GuestEngine has zero shims for - that combination would make this
# test fail for an uninteresting, unrelated reason (unimplemented vtable
# stub returning 0) instead of actually exercising real, compiled
# std::basic_stringbuf<char>::str()/write() logic. c++_static compiles that
# logic directly into THIS .so's own .text - both a working build AND a
# closer functional match to what libapp.so's own (much older) toolchain
# evidently did for sub_79CD4/sub_27160C (confirmed real, compiled,
# fixed-address code inside libapp.so itself, never external imports -
# see ARM64_TRANSLATION_LAYER.md's 2026-09-16 entries).
cmake -B build -G Ninja \
    -DCMAKE_TOOLCHAIN_FILE="$TOOLCHAIN" \
    -DANDROID_ABI=armeabi-v7a \
    -DANDROID_PLATFORM=android-27 \
    -DANDROID_STL=c++_static \
    -DCMAKE_BUILD_TYPE=Debug \
    .

cmake --build build

echo "Built: $(pwd)/build/libostream_repro.so"