CROSS-PLATFORM PITFALLS AND HOW TO AVOID THEM Erika Sweet (she/her) Microsoft C++ TeamWelcome to CppCon 2020! Visit our table at the Expo Hall https://aka.ms/cppcon/expo • Meet the Microsoft C++ (e.g. NuGet) Language specific package managers (e.g. vcpkg, Conan) Our recommendation for C++ cross-platform developmentC++ package managers: Conan, vcpkg Bring down and build libraries from source The solution spaceDebugging: the solution space Cross-platform IDEs, editors, and tools CLion, VS Code, Qt CreatorDebugging: the solution space Cross-platform IDEs, editors, and tools CLion, VS Code

1 (Sort of) 2 3Why FP Determinism is Important?_ CppCon 2024 sixit:: 5 ✅ Same Executable Cross Platform Different Contexts ❌ ❌ 1 (Sort of) 2 3 General Sanity, Testability Distributed when using the identically compiled files and run on systems that adhere to the IEEE standards. Cross platform synchronized network simulations or replays will not possible [sic].” - Most upvoted answer

35-year career in video games and embedded software • Started using C++ in 1995 • First cross-platform project in 1994Cross-Platform Architecture Goals • Take advantage of all platforms • Focus on the compiler

CppCon 2021 CppCon 2021 What’s New In ‘ Visual Studio 64-bit IDE, C++20, WSL2, and More Marian Luparu (he/him) @mluparu Sy Brand (they/them) @TartanLlama C++ Product Team, Microsoft @VisualC https://aka Compiler & Libraries 3. by simplifying acquisition in C++ via vcpkg 4. by improving the Visual Studio IDE 5. by continuing to enhance the C++ experience for Visual Studio Code Our agenda today Visual Agenda 1. Conformance 2. Code Safety 3. Cross-platform development 4. Developer and Team Productivity Visual Studio Agenda 1. Conformance 2. Code Safety 3. Cross-platform development 4. Developer and

. . . . . . . . . . . . . . . . . . . . . . . 77 5 Virtual storage 79 5.1 Hard disk controllers: IDE, SATA (AHCI), SCSI, SAS . . . . . . . . . . . . . . . . 79 5.2 Disk image files (VDI, VMDK, VHD, HDD) 12.2.1 Guest shows IDE/SATA errors for file-based images on slow host file system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203 12.2.2 Responding to guest IDE/SATA flush requests Linux host floppy not found . . . . . . . . . . . . . . . . . . . . . . . . 212 12.7.5 Strange guest IDE error messages when writing to CD/DVD . . . . . . . 212 12.7.6 VBoxSVC IPC issues . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . 74 5 Virtual storage 76 5.1 Hard disk controllers: IDE, SATA (AHCI), SCSI, SAS . . . . . . . . . . . . . . . . 76 5.2 Disk image files (VDI, VMDK, VHD, HDD) 12.2.1 Guest shows IDE/SATA errors for file-based images on slow host file system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182 12.2.2 Responding to guest IDE/SATA flush requests Linux host floppy not found . . . . . . . . . . . . . . . . . . . . . . . . 191 12.6.5 Strange guest IDE error messages when writing to CD/DVD . . . . . . . 191 12.6.6 VBoxSVC IPC issues . . . . . . . .

Compiler & Libraries • by simplifying acquisition in C++ via vcpkg • by improving the Visual Studio IDE • by continuing to enhance the C++ experience for Visual Studio Code Our agenda todayVisual Studio Toolchain 4. Debugging, Cross-Platform & Source Control https://aka.ms/Visual-StudioVisual Studio Agenda 1. Productivity 2. Game Development 3. MSVC Toolchain 4. Debugging, Cross-Platform & Source ControlBuild accept )Visual Studio Agenda 1. Productivity 2. Game Development 3. MSVC Toolchain 4. Debugging, Cross-Platform & Source ControlUnreal Engine IntegrationsDirect Support for Unreal Engine Projects o You

. . . . . . . . . . . . . . . . . . . . . . . 78 5 Virtual storage 80 5.1 Hard disk controllers: IDE, SATA (AHCI), SCSI, SAS . . . . . . . . . . . . . . . . 80 5.2 Disk image files (VDI, VMDK, VHD, HDD) 12.2.1 Guest shows IDE/SATA errors for file-based images on slow host file system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213 12.2.2 Responding to guest IDE/SATA flush requests Linux host floppy not found . . . . . . . . . . . . . . . . . . . . . . . . 223 12.7.5 Strange guest IDE error messages when writing to CD/DVD . . . . . . . 223 12.7.6 VBoxSVC IPC issues . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . 81 5 Virtual storage 83 5.1 Hard disk controllers: IDE, SATA (AHCI), SCSI, SAS, USB MSD, NVMe . . . . . . 83 5.2 Disk image files (VDI, VMDK, VHD, HDD) . 12.2.1 Guest shows IDE/SATA errors for file-based images on slow host file system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263 12.2.2 Responding to guest IDE/SATA flush requests Linux host floppy not found . . . . . . . . . . . . . . . . . . . . . . . . 274 12.8.5 Strange guest IDE error messages when writing to CD/DVD . . . . . . . 274 12.8.6 VBoxSVC IPC issues . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . 81 5 Virtual storage 83 5.1 Hard disk controllers: IDE, SATA (AHCI), SCSI, SAS, USB MSD, NVMe . . . . . . 83 5.2 Disk image files (VDI, VMDK, VHD, HDD) . 12.2.1 Guest shows IDE/SATA errors for file-based images on slow host file system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 12.2.2 Responding to guest IDE/SATA flush requests Linux host floppy not found . . . . . . . . . . . . . . . . . . . . . . . . 273 12.8.5 Strange guest IDE error messages when writing to CD/DVD . . . . . . . 273 12.8.6 VBoxSVC IPC issues . . . . . . . .