inital, almost working cross-compilation setup with Visual Studio and cmake

scripts/build_sdl_linux.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+SDL_SOURCE="$PROJECT_ROOT/external/SDL"
+BUILD_DIR="$PROJECT_ROOT/out/build/_sdl_build/linux"
+PREBUILT_DIR="$PROJECT_ROOT/prebuilt/linux"
+BUILD_TYPE="${1:-Release}"
+
+build_sdl() {
+    local LINK_TYPE="$1"
+    local SHARED="OFF"
+    local STATIC="OFF"
+
+    if [ "$LINK_TYPE" = "dynamic" ]; then SHARED="ON"; else STATIC="ON"; fi
+
+    local OUT_DIR="$PREBUILT_DIR/SDL3-$LINK_TYPE"
+    local BUILD_OUT="$BUILD_DIR/$LINK_TYPE"
+
+    echo ""
+    echo "=== Building SDL3 ($LINK_TYPE) for Linux ==="
+
+    cmake -S "$SDL_SOURCE" -B "$BUILD_OUT" \
+        -G "Ninja" \
+        -DCMAKE_BUILD_TYPE="$BUILD_TYPE" \
+        -DCMAKE_INSTALL_PREFIX="$OUT_DIR" \
+        -DCMAKE_C_COMPILER=gcc-12 \
+        -DCMAKE_CXX_COMPILER=g++-12 \
+        -DSDL_SHARED="$SHARED" \
+        -DSDL_STATIC="$STATIC" \
+        -DSDL_INSTALL=ON \
+        -DSDL_TEST_LIBRARY=OFF \
+        -DSDL_TESTS=OFF
+
+    cmake --build "$BUILD_OUT"
+    cmake --install "$BUILD_OUT"
+
+    echo "=== Done: $OUT_DIR ==="
+}
+
+# Install build dependencies if needed (Debian 12 bookworm)
+echo "Checking build dependencies..."
+sudo apt-get update -qq
+sudo apt-get install -y --no-install-recommends \
+    ninja-build cmake build-essential \
+    gcc-12 g++-12 \
+    libx11-dev libxext-dev libxrandr-dev libxcursor-dev libxi-dev \
+    libwayland-dev libpulse-dev libasound2-dev \
+    libgl1-mesa-dev
+
+build_sdl "dynamic"
+build_sdl "static"

scripts/build_sdl_windows.ps1

@@ -0,0 +1,48 @@
+param(
+    [string]$BuildType = "Release"
+)
+
+$ProjectRoot = Resolve-Path "$PSScriptRoot\.."
+$SdlSource   = "$ProjectRoot\external\SDL"
+$BuildDir    = "$ProjectRoot\out\build\_sdl_build\windows"
+$PrebuiltDir = "$ProjectRoot\prebuilt\windows"
+
+function Build-SDL {
+    param([string]$LinkType)
+
+    $Shared   = if ($LinkType -eq "dynamic") { "ON" } else { "OFF" }
+    $Static   = if ($LinkType -eq "static")  { "ON" } else { "OFF" }
+    $OutDir   = "$PrebuiltDir\SDL3-$LinkType"
+    $BuildOut = "$BuildDir\$LinkType"
+
+    Write-Host "`n=== Building SDL3 ($LinkType) for Windows ===" -ForegroundColor Cyan
+
+    # Wipe any stale build directory to avoid corrupted cache issues
+    if (Test-Path $BuildOut) {
+        Write-Host "Removing stale build directory: $BuildOut" -ForegroundColor Yellow
+        Remove-Item -Recurse -Force $BuildOut
+    }
+
+    cmake -S "$SdlSource" -B "$BuildOut" `
+        -G "Visual Studio 17 2022" `
+        -A x64 `
+        -DCMAKE_INSTALL_PREFIX="$OutDir" `
+        -DSDL_SHARED="$Shared" `
+        -DSDL_STATIC="$Static" `
+        -DSDL_INSTALL=ON `
+        -DSDL_TEST_LIBRARY=OFF `
+        -DSDL_TESTS=OFF
+
+    if ($LASTEXITCODE -ne 0) { Write-Error "CMake configure failed"; exit 1 }
+
+    cmake --build "$BuildOut" --config "$BuildType"
+    if ($LASTEXITCODE -ne 0) { Write-Error "CMake build failed"; exit 1 }
+
+    cmake --install "$BuildOut" --config "$BuildType"
+    if ($LASTEXITCODE -ne 0) { Write-Error "CMake install failed"; exit 1 }
+
+    Write-Host "=== Done: $OutDir ===" -ForegroundColor Green
+}
+
+Build-SDL -LinkType "dynamic"
+Build-SDL -LinkType "static"