fatal error: too many errors emitted, stopping now

[jensen82]

I'm trying to generate a class diagram of my project and got the error in the caption. This is the uml-file

diagrams: class_diagram: type: class title: Basic class diagram example include: paths: ['lib/systemlink/include'] comment_parser: clang plantuml: after: - '{% set e=element("A") %} note left of {{ e.alias }} : {{ trim(e.comment.brief.0) }}' - '{% set e=element("clanguml::t00002::B") %} note top of {{ e.alias }} : {{ trim(e.comment.brief.0) }}' - | note right of {{ alias("D") }} {{ comment("D").text }} end note mermaid: after: - '{% set e=element("A") %} note for {{ e.alias }} "{{ trim(e.comment.brief.0) }}"' - '{% set e=element("clanguml::t00002::B") %} note for {{ e.alias }} "{{ trim(e.comment.brief.0) }}"' - 'note for {{ alias("D") }} "{{ comment("D").text }}"'

My compilation database looks like this:

{ "directory": "C:/dev/projects/myclientLib/myclientLib/source/build/lib/systemlink", "command": "C:\\msys64\\ucrt64\\bin\\g++.exe -DFILELOG -DLOG_ENABLED -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\myclientLiblib\\myclientLib.modules.3rdparty.plog\\1.1.10.69\\build\\native\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\myclientLiblib\\myclientLib.modules.3rdparty.boost.headers\\1.85.0.124\\build\\native\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\myclientLiblib\\modules.cpp.myclientLib.TransportLayer.Client.debug-windows-10-x86_64-gnu.13\\1.3.0\\build\\native\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\myclientLiblib\\modules.cpp.googletest.debug-windows-10-x86_64-gnu.13\\1.14.0\\build\\native\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\systemlink\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\build\\lib\\systemlink -Wall -Wno-unused-parameter -pedantic --std=c++11 -fPIC -frtti -g3 -O0 -DDEBUG -std=c++11 -o CMakeFiles\\myclientLibstatic.dir\\src\\ApsThreatAlertData.cpp.obj -c C:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\systemlink\\src\\ApsThreatAlertData.cpp", "file": "C:/dev/projects/myclientLib/myclientLib/source/lib/systemlink/src/ApsThreatAlertData.cpp", "output": "lib/systemlink/CMakeFiles/myclientLibstatic.dir/src/ApsThreatAlertData.cpp.obj" }, { "directory": "C:/dev/projects/myclientLib/myclientLib/source/build/lib/systemlink", "command": "C:\\msys64\\ucrt64\\bin\\g++.exe -DFILELOG -DLOG_ENABLED -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\myclientLiblib\\myclientLib.modules.3rdparty.plog\\1.1.10.69\\build\\native\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\myclientLiblib\\myclientLib.modules.3rdparty.boost.headers\\1.85.0.124\\build\\native\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\myclientLiblib\\modules.cpp.myclientLib.TransportLayer.Client.debug-windows-10-x86_64-gnu.13\\1.3.0\\build\\native\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\myclientLiblib\\modules.cpp.googletest.debug-windows-10-x86_64-gnu.13\\1.14.0\\build\\native\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\systemlink\\include -IC:\\dev\\projects\\myclientLib\\myclientLib\\source\\build\\lib\\systemlink -Wall -Wno-unused-parameter -pedantic --std=c++11 -fPIC -frtti -g3 -O0 -DDEBUG -std=c++11 -o CMakeFiles\\myclientLibstatic.dir\\src\\IDataManagementFeature.cpp.obj -c C:\\dev\\projects\\myclientLib\\myclientLib\\source\\lib\\systemlink\\src\\IDataManagementFeature.cpp", "file": "C:/dev/projects/myclientLib/myclientLib/source/lib/systemlink/src/IDataManagementFeature.cpp", "output": "lib/systemlink/CMakeFiles/myclientLibstatic.dir/src/IDataManagementFeature.cpp.obj" },

What could be the problem? Is the compilation database malformed?

[bkryza]

@jensen82 Can you see any specific errors reported by Clang in the log?
The error fatal error: too many errors emitted, stopping now is usually emitted by Clang when parsing the sources, for instance when it cannot find certain include files or your project uses features of C++ higher than version specified in the compilation database.

In general these errors can be resolved by adjusting the compilation database, which can be done through the clang-uml configuration file, for instance:

add_compile_flags:
  - -I/opt/my_toolchain/include
remove_compile_flags:
  - -I/usr/include
  - r: "-m.*"

Also see here

[jensen82]

Hi,

i'm sorry. Did not work.

Here are some details:

[info] [tid 10504] [C:\dev\projects\clang-uml-tmp\clang-uml\src\common\generators\generators.h:367] Generating diagram t00002_class In file included from C:\dev\playground\cpp-cast\main.cpp:1: In file included from C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.40.33807\include\iostream:8: C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.40.33807\include\yvals_core.h:898:1: error: static assertion failed: error STL1000: Unexpected compiler version, expected Clang 17.0.0 or newer. _EMIT_STL_ERROR(STL1000, "Unexpected compiler version, expected Clang 17.0.0 or newer."); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.40.33807\include\yvals_core.h:519:44: note: expanded from macro '_EMIT_STL_ERROR' #define _EMIT_STL_ERROR(NUMBER, MESSAGE) static_assert(false, "error " #NUMBER ": " MESSAGE) ^ ~~~~~ 1 error generated. Error while processing C:\dev\playground\cpp-cast\main.cpp. [error] [tid 10504] [C:\dev\projects\clang-uml-tmp\clang-uml\src\common\generators\generators.cc:289] ERROR: Failed to generate diagram t00002_class: Diagram t00002_class generation failed

[bkryza]

@jensen82 Ok, can you also paste the output of

clang-uml.exe --version

?

[jensen82]

Of course...

This is clang:
clang version 17.0.3
Target: i686-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\Llvm\bin

This is clang-uml:
clang-uml 0.5.4-2-g43482c9
Copyright (C) 2021-2024 Bartek Kryza [email protected]
Windows, 32-bit
Built against LLVM/Clang libraries version: 15.0.6
Using LLVM/Clang libraries version: clang version 15.0.6 (https://github.com/llvm/llvm-project.git 088f33605d8a61ff519c580a71b1dd57d16a03f8)

The requirement is fulfilled....

[bkryza]

@jensen82 Ok, now I see that you've built clang-uml on Windows from source, and linked it against LLVM 15.

Your errors:

error STL1000: Unexpected compiler version, expected Clang 17.0.0 or newer. _EMIT_STL_ERROR(STL1000, "Unexpected compiler version, expected Clang 17.0.0 or newer.");

state that you need to link clang-uml with at least version 17 to be able to use with headers in VC Tools.

Or you can try the clang-uml installer for version 0.5.4 which is linked with LLVM 18...

[jensen82]

@jensen82 Ok, now I see that you've built clang-uml on Windows from source, and linked it against LLVM 15.

Your errors:

error STL1000: Unexpected compiler version, expected Clang 17.0.0 or newer. _EMIT_STL_ERROR(STL1000, "Unexpected compiler version, expected Clang 17.0.0 or newer.");

state that you need to link clang-uml with at least version 17 to be able to use with headers in VC Tools.

Or you can try the clang-uml installer for version 0.5.4 which is linked with LLVM 18...

Sorry, i should have seen it. I thought clang 17 is used for runtime...

Thank you

[jensen82]

Just for info. I followed your tutorial to build it. Did you ever try it with MinGw on Windows?

[bkryza]

@jensen82 I haven't although I definitely would like to check whether it's possible to use it.

Can you describe a little more your setup? What do you use to compile (MSVC or mingw) for each of the following:

• your project from which you want to generate diagrams
• LLVM
• clang-uml

?

I don't think it's possible to mix so either all three have to be built using mingw or all using MSVC, but I might be wrong...

Also, in the end did get it to work or are you still getting some errors?

[jensen82]

Hi,

i tried the installer, still a problem. i attached the console output
errors.txt

[jensen82]

Seems like -fPIC is not supported

[jensen82]

Maybe you need more infos, is there an opportunity to log to a file?

[bkryza]

The problem is that Clang fails on the MSVC sources, in particular:

C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.41.34120\include\ratio

for instance an error like:

C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.41.34120\include\ratio:57:5: error: statement not allowed in constexpr function
   57 |     while (_Bx != 0) {
      |     ^

means that Clang version to which clang-uml is linked cannot parse this code? Could be that your compile_commands.json for instance does not have proper C++ flags (especially missing C++ version flag)...

Could you describe your setup in more detail so that I can try to reproduce it?

• Is your project based in MSVC or Mingw?
• How do you generate your compile_commands.json
• How do you invoke clang-uml?
• The contents of your .clang-uml config file

[bkryza]

@jensen82 You can also adjust the compilation database within the .clang-uml config file, by adding and removing specific flags:

remove_compile_flags:
  - '-Wall'
  - '-pedantic'
  - '--std=c++11'
  - '-std=c++11'
add_compile_flags:
  -  '-std=c++20'

You can try different C++ versions, but AFAIK c++11 does not allow loops in constexpr functions, so that's probably why the ratio header file is rejected by Clang, assuming you have c++11 in your compile_commands.json or no version flag...