[BUG] Compilation failure with Clang on Windows

[MatthieuHernandez]

I get a compiler error when I compile the sources.

• compiler: clang version 18.1.6
• standard library: MSVC version 14.35.32215
• OS: Windows 11 version 23H2

This is the error I get:

PS C:\Programming\Git\cppfront\source> clang++ -v cppfront.cpp -std=c++20 -o cppfront
clang version 18.1.6
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\LLVM\bin
 "C:\\Program Files\\LLVM\\bin\\clang++.exe" -cc1 -triple x86_64-pc-windows-msvc19.35.32217 -emit-obj -mrelax-all -mincremental-linker-compatible -dumpdir cppfront- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name cppfront.cpp -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic "-fdebug-compilation-dir=C:\\Programming\\Git\\cppfront\\source" -v "-fcoverage-compilation-dir=C:\\Programming\\Git\\cppfront\\source" -resource-dir "C:\\Program Files\\LLVM\\lib\\clang\\18" -internal-isystem "C:\\Program Files\\LLVM\\lib\\clang\\18\\include" -internal-isystem "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.35.32215\\include" -internal-isystem "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.35.32215\\atlmfc\\include" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\ucrt" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\shared" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\um" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\winrt" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\cppwinrt" -std=c++20 -fdeprecated-macro -ferror-limit 19 -fmessage-length=280 -fno-use-cxa-atexit -fms-extensions -fms-compatibility -fms-compatibility-version=19.35.32217 -fno-implicit-modules -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -fcolor-diagnostics -faddrsig -o "C:\\Users\\matth\\AppData\\Local\\Temp\\cppfront-eabda8.o" -x c++ cppfront.cpp
clang -cc1 version 18.1.6 based upon LLVM 18.1.6 default target x86_64-pc-windows-msvc
#include "..." search starts here:
#include <...> search starts here:
 C:\Program Files\LLVM\lib\clang\18\include
 C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.35.32215\include
 C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.35.32215\atlmfc\include
 C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\ucrt
 C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\shared
 C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\um
 C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\winrt
 C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\cppwinrt
End of search list.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: "C:\\Program Files\\LLVM\\bin\\clang++.exe" -cc1 -triple x86_64-pc-windows-msvc19.35.32217 -emit-obj -mrelax-all -mincremental-linker-compatible -dumpdir cppfront- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name cppfront.cpp -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -fdebug-compilation-dir=C:\\Programming\\Git\\cppfront\\source -v -fcoverage-compilation-dir=C:\\Programming\\Git\\cppfront\\source -resource-dir "C:\\Program Files\\LLVM\\lib\\clang\\18" -internal-isystem "C:\\Program Files\\LLVM\\lib\\clang\\18\\include" -internal-isystem "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.35.32215\\include" -internal-isystem "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Tools\\MSVC\\14.35.32215\\atlmfc\\include" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\ucrt" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\shared" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\um" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\winrt" -internal-isystem "C:\\Program Files (x86)\\Windows Kits\\10\\Include\\10.0.19041.0\\cppwinrt" -std=c++20 -fdeprecated-macro -ferror-limit 19 -fmessage-length=280 -fno-use-cxa-atexit -fms-extensions -fms-compatibility -fms-compatibility-version=19.35.32217 -fno-implicit-modules -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -fcolor-diagnostics -faddrsig -o C:\\Users\\matth\\AppData\\Local\\Temp\\cppfront-eabda8.o -x c++ cppfront.cpp
1.      reflect.h2:250:140: current parser token ')'
2.      reflect.h2:22:1: parsing namespace 'cpp2'
3.      reflect.h2:24:1: parsing namespace 'cpp2::meta'
4.      reflect.h2:250:78: parsing function body 'cpp2::meta::declaration_base::position'
5.      reflect.h2:250:78: in compound statement ('{}')
Exception Code: 0xC0000005
 #0 0x00007ff676efbc28 (C:\Program Files\LLVM\bin\clang++.exe+0x1c7bc28)
 #1 0x00007ff676efbbe3 (C:\Program Files\LLVM\bin\clang++.exe+0x1c7bbe3)
 #2 0x00007ff676efb011 (C:\Program Files\LLVM\bin\clang++.exe+0x1c7b011)
 #3 0x00007ff676d552b8 (C:\Program Files\LLVM\bin\clang++.exe+0x1ad52b8)
 #4 0x00007ff676d541d7 (C:\Program Files\LLVM\bin\clang++.exe+0x1ad41d7)
 #5 0x00007ff676d6fe6a (C:\Program Files\LLVM\bin\clang++.exe+0x1aefe6a)
 #6 0x00007ff676d5420e (C:\Program Files\LLVM\bin\clang++.exe+0x1ad420e)
 #7 0x00007ff676d531d1 (C:\Program Files\LLVM\bin\clang++.exe+0x1ad31d1)
 #8 0x00007ff676d5417c (C:\Program Files\LLVM\bin\clang++.exe+0x1ad417c)
 #9 0x00007ff6786d65c9 (C:\Program Files\LLVM\bin\clang++.exe+0x34565c9)
#10 0x00007ff6786cfb2e (C:\Program Files\LLVM\bin\clang++.exe+0x344fb2e)
#11 0x00007ff676d54b84 (C:\Program Files\LLVM\bin\clang++.exe+0x1ad4b84)
#12 0x00007ff676d568af (C:\Program Files\LLVM\bin\clang++.exe+0x1ad68af)
#13 0x00007ff676d5419d (C:\Program Files\LLVM\bin\clang++.exe+0x1ad419d)
#14 0x00007ff676dc3129 (C:\Program Files\LLVM\bin\clang++.exe+0x1b43129)
#15 0x00007ff67734f3dd (C:\Program Files\LLVM\bin\clang++.exe+0x20cf3dd)
#16 0x00007ff67734b45a (C:\Program Files\LLVM\bin\clang++.exe+0x20cb45a)
#17 0x00007ff67734aedc (C:\Program Files\LLVM\bin\clang++.exe+0x20caedc)
#18 0x00007ff6770a3e0d (C:\Program Files\LLVM\bin\clang++.exe+0x1e23e0d)
#19 0x00007ff676f49853 (C:\Program Files\LLVM\bin\clang++.exe+0x1cc9853)
#20 0x00007ff676f7d543 (C:\Program Files\LLVM\bin\clang++.exe+0x1cfd543)
#21 0x00007ff675903936 (C:\Program Files\LLVM\bin\clang++.exe+0x683936)
#22 0x00007ff676ecfc56 (C:\Program Files\LLVM\bin\clang++.exe+0x1c4fc56)
#23 0x00007ff676ec91a9 (C:\Program Files\LLVM\bin\clang++.exe+0x1c491a9)
#24 0x00007ff676ec4bad (C:\Program Files\LLVM\bin\clang++.exe+0x1c44bad)
#25 0x00007ff676ec2181 (C:\Program Files\LLVM\bin\clang++.exe+0x1c42181)
#26 0x00007ff676ebf2eb (C:\Program Files\LLVM\bin\clang++.exe+0x1c3f2eb)
#27 0x00007ff676eb46c5 (C:\Program Files\LLVM\bin\clang++.exe+0x1c346c5)
#28 0x00007ff676d1b949 (C:\Program Files\LLVM\bin\clang++.exe+0x1a9b949)
#29 0x00007ff676d0fed4 (C:\Program Files\LLVM\bin\clang++.exe+0x1a8fed4)
#30 0x00007ff676d0ecd7 (C:\Program Files\LLVM\bin\clang++.exe+0x1a8ecd7)
#31 0x00007ff676d0c975 (C:\Program Files\LLVM\bin\clang++.exe+0x1a8c975)
#32 0x00007ff676d0c5cc (C:\Program Files\LLVM\bin\clang++.exe+0x1a8c5cc)
#33 0x00007ff67536d43e (C:\Program Files\LLVM\bin\clang++.exe+0xed43e)
#34 0x00007ff676d0dd47 (C:\Program Files\LLVM\bin\clang++.exe+0x1a8dd47)
#35 0x00007ff676d0c820 (C:\Program Files\LLVM\bin\clang++.exe+0x1a8c820)
#36 0x00007ff676d0c5cc (C:\Program Files\LLVM\bin\clang++.exe+0x1a8c5cc)
#37 0x00007ff67536d43e (C:\Program Files\LLVM\bin\clang++.exe+0xed43e)
#38 0x00007ff676d0dd47 (C:\Program Files\LLVM\bin\clang++.exe+0x1a8dd47)
#39 0x00007ff676d0c820 (C:\Program Files\LLVM\bin\clang++.exe+0x1a8c820)
#40 0x00007ff6776ff53f (C:\Program Files\LLVM\bin\clang++.exe+0x247f53f)
#41 0x00007ff6776ff1d1 (C:\Program Files\LLVM\bin\clang++.exe+0x247f1d1)
#42 0x00007ff67582dd31 (C:\Program Files\LLVM\bin\clang++.exe+0x5add31)
#43 0x00007ff67582d7d2 (C:\Program Files\LLVM\bin\clang++.exe+0x5ad7d2)
#44 0x00007ff67582a504 (C:\Program Files\LLVM\bin\clang++.exe+0x5aa504)
#45 0x00007ff675828080 (C:\Program Files\LLVM\bin\clang++.exe+0x5a8080)
#46 0x00007ff675826a4e (C:\Program Files\LLVM\bin\clang++.exe+0x5a6a4e)
#47 0x00007ff675666f7c (C:\Program Files\LLVM\bin\clang++.exe+0x3e6f7c)
#48 0x00007ff675662bc3 (C:\Program Files\LLVM\bin\clang++.exe+0x3e2bc3)
#49 0x00007ff677784bb0 (C:\Program Files\LLVM\bin\clang++.exe+0x2504bb0)
#50 0x00007ffdc945257d (C:\WINDOWS\System32\KERNEL32.DLL+0x1257d)
#51 0x00007ffdcb12af28 (C:\WINDOWS\SYSTEM32\ntdll.dll+0x5af28)
clang++: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 18.1.6
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\LLVM\bin
clang++: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++: note: diagnostic msg: C:\Users\matth\AppData\Local\Temp\cppfront-6291c4.cpp
clang++: note: diagnostic msg: C:\Users\matth\AppData\Local\Temp\cppfront-6291c4.sh
clang++: note: diagnostic msg:

********************

[MatthieuHernandez]

I also get a error when trying to compile with MSVC.

PS C:\Programming\Git\cppfront\source> cl cppfront.cpp -std:c++20 -EHsc
Microsoft (R) C/C++ Optimizing Compiler Version 14.00.50727.762 for x64
Copyright (C) Microsoft Corporation. All rights reserved.

cppfront.cpp
C:\Programming\Git\cppfront\source\../include/cpp2util.h(51): fatal error C1034: version: no include path set

[vanceism7]

Interesting, I was seeing a similar error to your clang++ compilation when invoking cl - mentioned here: #1293

Its weird that your cl is having a hard time seeing the includes though. I thought it would pick those up automatically. Are you running cl from the Developer Powershell for VS 2022 shell?

[MatthieuHernandez]

I was running the command from Powershell but using Developer Command Prompt it works with cl. It seems that the error was on my side, sorry 😅
I guess I'm missing some paths in my environment variables, even though I do have the path to MSVC includes.
However, this doesn't solve my problem with the Clang compiler.

[vanceism7]

Yea, so I just tested this with a fresh install of MingW and also Clang the same as you; nothing is compiling for me on any of them either.

On clang, I'm getting exactly the same errors you're getting. Using MingW g++, I'm getting the issue mentioned in the guide

Note: On Windows (including MinGW), if you get a "too many sections" message, specify the switch /bigobj (MSVC) or /Wa,-mbig-obj (GCC).

But using the /Wa,-mbig-obj isn't fixing it. When I ran g++ inside of a linux vm, it compiled perfectly in just a couple of seconds - so it seems like building in windows is just problematic at the moment

[vanceism7]

Hey so I'm not sure why clang isn't compiling properly, but your msvc version looks old. I was running into this same issue with cl version 14, update it to 19 and it should start working for msvc compiler

[MatthieuHernandez]

For now, I'm compiling completely with MSVC and it's working properly, I haven't retried compiling with Clang.