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Migrate codebase to C++20

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- VCMI can now be compiled in C++20 mode
- Replaced all references to C++17 with C++20
- Boost 1.74 is now set as minimal version (older version might work but
untested)
- Updated documentation to reflect required versions of compilers /
libraries
- Removed excessive fail-fast / continue-on-error from CI
This commit is contained in:
Ivan Savenko
2025-11-02 14:43:12 +02:00
parent c7a1558c81
commit cf378c3672
13 changed files with 48 additions and 45 deletions
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8
docs/developers/Building_Linux.md
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@@ -1,7 +1,7 @@
# Building VCMI for Linux
- Current baseline requirement for building is Ubuntu 20.04
- Supported C++ compilers for UNIX-like systems are GCC 9+ and Clang 13+
- Current baseline requirement for building is Ubuntu 22.04 or later
- Supported C++ compilers for UNIX-like systems are GCC 10+ and Clang 13+
Older distributions and compilers might work, but they aren't tested by Github CI (Actions)
@@ -15,8 +15,8 @@ To compile, the following packages (and their development counterparts) are need
- SDL2 with devel packages: mixer, image, ttf
- minizip or minizip-ng
- zlib and zlib-devel
- Boost C++ libraries v1.48+: program-options, filesystem, system, thread, locale
- Recommended, if you want to build launcher or map editor: Qt 5, widget and network modules
- Boost C++ libraries: program-options, filesystem, system, thread, locale
- Recommended, if you want to build launcher or map editor: Qt (widget and network modules)
- Recommended, FFmpeg libraries, if you want to watch in-game videos: libavformat and libswscale. Their name could be libavformat-devel and libswscale-devel, or ffmpeg-libs-devel or similar names.
- Optional:
- if you want to build scripting modules: LuaJIT

17
docs/developers/Coding_Guidelines.md
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@@ -2,9 +2,22 @@
## C++ Standard
VCMI implementation bases on C++17 standard. Any feature is acceptable as long as it's will pass build on our CI, but there is list below on what is already being used.
VCMI implementation bases on C++20 standard. Any feature is acceptable as long as it's will pass build on our CI. At the time of writing, following compilers are supported, and any C++20 feature available across all these compilers can be used:
Any compiler supporting C++17 should work, but this has not been thoroughly tested. You can find information about extensions and compiler support at <http://en.cppreference.com/w/cpp/compiler_support>
- GCC 10 or newer
- Clang 13 or newer
- Visual Studio 2022 (MSVC 19.44)
- XCode 16.2 (Apple Clang 16.0.0)
You can find information about compiler support at <https://en.cppreference.com/w/cpp/compiler_support/20.html>.
Additionally, features that require macOS 10.15 or newer are not available: <https://developer.apple.com/xcode/cpp/#c++20>
- (C++17) Filesystem library
- (C++17) Elementary string conversions std::to_chars, std::from_chars
- (C++20) Synchronization library (<barrier>, <latch>, <semaphore> and notification functions on std::atomic)
- (C++20) Add max() to latch and barrier
- (C++20) memory_resource
## Style Guidelines