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ci: flashmini pipeline, linux support - #2
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October 3, 2026 11:59
MSVC's STL provides size_t, std::invoke, std::forward, std::memcpy, ... transitively; libstdc++ and libc++ do not. Also qualify std::nullptr_t, the global nullptr_t is a GCC extension that Clang rejects.
std::format(fmt, __VA_ARGS__) left a trailing comma when no arguments were passed. Use __VA_OPT__, which requires /Zc:preprocessor on MSVC.
The condition was evaluated in the if-initializer and again as the if condition, so side effects (e.g. timerfd_settime, SetEvent) ran twice.
A name used in a class must keep its meaning in the completed class ([basic.scope.class]); gcc diagnoses this as an error (-Wchanges-meaning).
enable_testing() ran after the subprojects were added, so ctest only saw integration_tests. The targets already enable buildcache through cth_target_enable_build_cache(OPTIONAL); the global launcher made it mandatory.
Build & Test runs one pipeline per compiler: linux (gcc, clang) inside a CachyOS container built and cached in GHCR, windows (msvc, clang) on the hosted runner. vcpkg binaries are cached in GitHub Packages (NuGet), BuildCache objects in the actions cache with a GHCR fallback from master. CI presets live in ci/CMakeUserPresets.json. Linux builds cth_tests and cth_os_tests only until cth_coro (asio), cth_net (libhv) and cth_win/integration_tests are ported.
Superseded by cth::io::file::chop. Nothing included read.inl, and its wchar_t path relied on std::codecvt_utf8, which C++26 removes.
asio's posix descriptors need a wait type (eventfd/timerfd signal by becoming readable), windows object handles take none. async_wait_signaled dispatches on what the handle type supports instead of the platform.
Adds cth_target_alias_any.
vcpkg's libhv exports hv for shared and hv_static for static builds; the alias links whichever exists, so cth_net builds with both linkages.
cth_win wraps the Windows API. integration_tests linked cth::win without using it, it only needs cth::cth.
The runner ships LLVM 20, which rejects the constrained lambda template parameters in cth::alg::assign (fixed in clang 22).
CI runners overshot the previous 1ms bound by ~0.1ms. 3ms still catches falling back to the ~15.6ms default timer resolution on windows.
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Replaces the never-passing CI with the flashmini pipeline and makes cth build on Linux (GCC + Clang/libstdc++).
CI
Build & Testruns one pipeline per compiler: Linux (gcc, clang) in a CachyOS container built fromci/docker/linux/Dockerfileand cached in GHCR, Windows (msvc, clang) on the hosted runner.ci/CMakeUserPresets.json(configure, build and test preset per job).test.yml/release.ymland their actions (they referenced presets and targets that no longer exist).Linux / GCC / Clang
std::nullptr_t__VA_OPT__for calls without format arguments (/Zc:preprocessoron MSVC, as an interface option ofcth::cth)co::scheduler(gcc-Wchanges-meaning), pass the wait type for posix descriptors in asio'sasync_waitstdc++expforstd::stacktracewith libstdc++cth_target_alias_any(hv/hv_staticdepending on linkage)cth_winis only added on Windows;integration_testsno longer linkscth::win(it never used it)gcc_releasepreset, clang preset C compiler fixedFixes for all platforms
enable_testing()ran after the subprojects were added, so ctest only registeredintegration_tests(10 of ~290 tests)cth_target_enable_build_cache(OPTIONAL))loadTxt(cth::io::file::chopcovers it)Verified locally in the CI container: GCC 16.2 and Clang 23.1 build everything with 0 warnings, 263/263 tests pass. Windows is verified by this PR's CI.