The Roslyn 1.3.2 and 2.10.0 configurations were excluded from the
compiler matrix on non-Windows platforms because Microsoft.Net.Compilers
only ships .NET Framework executables. Both can be enabled:
- Roslyn 2.10.0 has a dotnet-hosted sibling package,
Microsoft.NETCore.Compilers, whose tools/bincore/csc.dll runs on the
installed runtime with --roll-forward LatestMajor (its runtimeconfig
pins the out-of-support .NET Core 2.0). Fetched on non-Windows into
the version's tools/bincore directory; GetCSharpCompiler probes for a
direct csc.dll next to the installed path in addition to the
bincore/ subfolder layout of the newer toolset packages.
- Roslyn 1.3.2 has no .NET build; when a mono executable is found on
the PATH, it is kept in the matrix and WrapCompiler hosts the .exe
compilers through mono. Because the native DiaSymReader needed for
Windows PDBs is unavailable there, GeneratePdb requests portable
PDBs on non-Windows (Roslyn 2.x+ falls back on its own, 1.x needs
the explicit -debug:portable).
The mcs configurations stay excluded: the bundled mcs 2.6.4 needs the
Reflection.Emit COMPILER_ACCESS mode that current Mono runtimes no
longer implement. Old-compiler configurations also stay excluded from
correctness-style fixtures: their output targets .NET Framework or
.NET Core 2.2, which the runners cannot execute here.
Microsoft.NETCore.Compilers-2.10.0.nupkg should be added to
ILSpy-tests/nuget to keep the fetch offline-capable.
Assisted-by: Claude:claude-fable-5:Claude Code
Compilation uses the .NET builds of the Roslyn toolsets (tasks/netcore*,
bincore csc.dll/vbc.dll launched through the dotnet host). ilasm/ildasm
options use the '-' prefix, which all platforms accept. The dotnet-hosted
compilers have no implicit references or SDK path: net40 compiles pass
mscorlib explicitly, and vbc gets -sdkpath, _MYTYPE=Empty and
-vbruntime:Microsoft.VisualBasic.Core.dll (the facade in the ref packs is
not followed for runtime helpers). The TestRunner gets a self-contained
build for the host platform.
Configurations depending on Windows-only tools or runtimes (legacy
csc/vbc, Roslyn 1.x/2.x, mcs, Force32Bit, executing net40 binaries) are
filtered from the matrix off-Windows via Tester.SupportedOnCurrentPlatform
or gated with [Platform("Win")]. PdbGen comparisons normalize document
name separators, and Correctness/Async uses Console.IsInputRedirected
instead of the Windows-only Console.CapsLock.
Assisted-by: Claude:claude-fable-5:Claude Code
* .NET 11 RC2 minimal changes
* Heuristic for transport feed Roslyn selection
* Microsoft.CodeAnalysis.NetAnalyzers from main NuGet feed
* Use the VS2026 image
* Switch all test projects to net11
* Extract constants
* Include vsix with plain nuget.config files
- Use custom test runner for correctness tests.
- Use .NET 6.0 framework for all Roslyn compiler tests.
- Disabled tests involving new string interpolation patterns.
Siegfried Pammer
Christoph Wille
Peter Crabtree