Bug 23206 – ImportC: __declspec(noreturn) does not compile

This happens when trying to compile errno.c in druntime: https://github.com/dlang/druntime/pull/3856 --- D:/a/1/dmd/generated/windows/release/64/dmd -c -of=errno_c_64.obj -m64 -conf= -O -release -preview=dip1000 -preview=fieldwise -preview=dtorfields -inline -w -Isrc -Iimport -v -P=-I. src\core\stdc\errno.c predefs DigitalMars LittleEndian D_Version2 all D_SIMD Windows Win64 CRuntime_Microsoft CppRuntime_Microsoft D_InlineAsm_X86_64 X86_64 D_LP64 D_ModuleInfo D_Exceptions D_TypeInfo D_HardFloat binary D:/a/1/dmd/generated/windows/release/64/dmd.exe version v2.100.0 config DFLAGS (none) include src\importc.h C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64\cl.exe /P /Zc:preprocessor /PD /nologo src\core\stdc\errno.c /FIsrc\importc.h /Fierrno.i -I. parse errno C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\include\vadefs.h(61): Error: missing comma or semicolon after declaration of `__anonymous`, found `uintptr_t` instead C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\include\vcruntime.h(96): Error: no type-specifier for parameter C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\include\vcruntime.h(96): Error: found `8` when expecting `,` C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\include\vcruntime.h(193): Error: `=`, `;` or `,` expected to end declaration instead of `typedef` C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\include\vcruntime.h(352): Error: no type for declarator before `__declspec` C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\ucrt\corecrt.h(125): Error: missing comma or semicolon after declaration of `__anonymous`, found `__pragma` instead C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\ucrt\corecrt.h(372): Error: no type for declarator before `__declspec` C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\ucrt\corecrt.h(374): Error: no type for declarator before `__declspec` C:\Program Files (x86)\Windows Kits\10\include\10.0.22000.0\ucrt\errno.h(18): Error: missing comma or semicolon after declaration of `__anonymous`, found `__pragma` instead src\core\stdc\errno.c(15): Error: `=`, `;` or `,` expected to end declaration instead of `int` src\core\stdc\errno.c(18): Error: no type for declarator before `}` --- errorlevel 1 ---

The first problem is: __pragma(pack(push, 8))

That was addressed by 22724. What's left is: __declspec(noreturn) void foo(void);

@WalterBright created dlang/dmd pull request #14252 "fix Issue 23206 - ImportC: __declspec(noreturn) does not compile" fixing this issue: - fix Issue 23206 - ImportC: __declspec(noreturn) does not compile https://github.com/dlang/dmd/pull/14252

dlang/dmd pull request #14252 "fix Issue 23206 - ImportC: __declspec(noreturn) does not compile" was merged into master: - 9df64451e42743b92cc46cf99b0742eed3382125 by Walter Bright: fix Issue 23206 - ImportC: __declspec(noreturn) does not compile https://github.com/dlang/dmd/pull/14252