#!/usr/bin/env bash

set -euo pipefail

# Install cross-compilation toolchains for Go + CGO

# Usage: ./install-cross-compilers.sh

echo "📦 Installing cross-compilation toolchains for Go + CGO..."

# Install all required packages

sudo apt-get update

sudo apt-get install -y \

gcc-x86-64-linux-gnu \

gcc-aarch64-linux-gnu \

gcc-mingw-w64-x86-64 \

musl-tools \

clang \

lld \

xz-utils \

curl

# Create symbolic links for musl compilers

sudo ln -sf /usr/bin/x86_64-linux-gnu-gcc /usr/local/bin/x86_64-linux-musl-gcc

sudo ln -sf /usr/bin/x86_64-linux-gnu-g++ /usr/local/bin/x86_64-linux-musl-g++

sudo ln -sf /usr/bin/aarch64-linux-gnu-gcc /usr/local/bin/aarch64-linux-musl-gcc

sudo ln -sf /usr/bin/aarch64-linux-gnu-g++ /usr/local/bin/aarch64-linux-musl-g++

echo "🍎 Setting up Darwin cross-compilation..."

# Where to install SDK

SDK_DIR="/opt/MacOSX12.3.sdk"

SDK_URL="https://github.com/phracker/MacOSX-SDKs/releases/download/12.3/MacOSX12.3.sdk.tar.xz"

# Download and extract macOS SDK if not already installed

if [ ! -d "$SDK_DIR" ]; then

echo "📦 Downloading macOS SDK..."

# Use -f to fail on HTTP errors, -L to follow redirects

if ! curl -fL "$SDK_URL" -o /tmp/MacOSX12.3.sdk.tar.xz; then

echo "❌ Failed to download macOS SDK from primary URL, trying alternative..."

SDK_URL_ALT="https://github.com/joseluisq/macosx-sdks/releases/download/12.3/MacOSX12.3.sdk.tar.xz"

curl -fL "$SDK_URL_ALT" -o /tmp/MacOSX12.3.sdk.tar.xz

fi

sudo mkdir -p /opt

sudo tar -xf /tmp/MacOSX12.3.sdk.tar.xz -C /opt

rm -f /tmp/MacOSX12.3.sdk.tar.xz

fi

# Create wrapper scripts with proper shebang and linker configuration

sudo tee /usr/local/bin/o64-clang > /dev/null << 'WRAPPER_EOF'

#!/bin/bash

exec clang -target x86_64-apple-darwin --sysroot=/opt/MacOSX12.3.sdk -fuse-ld=lld -Wno-unused-command-line-argument "$@"

WRAPPER_EOF

sudo tee /usr/local/bin/o64-clang++ > /dev/null << 'WRAPPER_EOF'

#!/bin/bash

exec clang++ -target x86_64-apple-darwin --sysroot=/opt/MacOSX12.3.sdk -fuse-ld=lld -Wno-unused-command-line-argument "$@"

WRAPPER_EOF

sudo tee /usr/local/bin/oa64-clang > /dev/null << 'WRAPPER_EOF'

#!/bin/bash

exec clang -target arm64-apple-darwin --sysroot=/opt/MacOSX12.3.sdk -fuse-ld=lld -Wno-unused-command-line-argument "$@"

WRAPPER_EOF

sudo tee /usr/local/bin/oa64-clang++ > /dev/null << 'WRAPPER_EOF'

#!/bin/bash

exec clang++ -target arm64-apple-darwin --sysroot=/opt/MacOSX12.3.sdk -fuse-ld=lld -Wno-unused-command-line-argument "$@"

WRAPPER_EOF

sudo chmod +x /usr/local/bin/o64-clang /usr/local/bin/o64-clang++ \

/usr/local/bin/oa64-clang /usr/local/bin/oa64-clang++

echo "✅ Darwin cross-compilation environment ready!"

echo "✅ Cross-compilation toolchains installed"

echo ""

echo "Available cross-compilers:"

echo " Linux amd64: x86_64-linux-musl-gcc, x86_64-linux-musl-g++"

echo " Linux arm64: aarch64-linux-musl-gcc, aarch64-linux-musl-g++"

echo " Windows amd64: x86_64-w64-mingw32-gcc, x86_64-w64-mingw32-g++"

echo " Windows arm64: aarch64-w64-mingw32-gcc, aarch64-w64-mingw32-g++"

echo " Darwin amd64: o64-clang, o64-clang++"

echo " Darwin arm64: oa64-clang, oa64-clang++"