ImNodes example not running

[system64MC]

Hi. I tried the example projects and it looks like I can't run the ImNodes example.

Here is what it says :

Added: /usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc
free(): double free detected in tcache 2
SIGABRT: Abnormal termination.
Abandon (core dumped)

It looks like it happens while calling NodeEditorInitialize().
I'm on POP!_OS 2204 LTS and I use Nim 2.2.0.

Is this normal?
Thanks for your answer!

[dinau]

Thank you for this report.
I can reproduce this problem on my Linux Mint 22.
I will look over this issue.

[dinau]

Updated sources.
First delete old save_load.bytes file and make run.

[system64MC]

Updated sources. First delete old save_load.bytes file and make run.

It works! Thanks!

Is it also possible to make a project without Make (Nim tools only)? I tried to make a baremetal ImGUI test with ImNodes, I have linker errors.

[dinau]

I will add this to README file,

pwd
examples/glfw_opnegl3_imnodes

nim c -d:release -d:strip -d:ImNodesEnable glfw_opengl3_imnodes.nim

[system64MC]

I will add this to README file,

pwd
examples/glfw_opnegl3_imnodes

nim c -d:release -d:strip -d:ImNodesEnable glfw_opengl3_imnodes.nim

That was quite straightforward! Thanks!
However I noticed a problem while trying to cross-compile from Linux to Windows. I have this error :

system64@pop-os:~/programmation/testNimImNodes/glfw_opengl3$ nim compile --os:windows glfw_opengl3.nim 

#### [ gcc ] Compiler ####

Hint: used config file '/home/system64/.choosenim/toolchains/nim-2.2.0/config/nim.cfg' [Conf]
Hint: used config file '/home/system64/.choosenim/toolchains/nim-2.2.0/config/config.nims' [Conf]
Hint: used config file '/home/system64/programmation/testNimImNodes/glfw_opengl3/config.nims' [Conf]
............................................................................................................................
/home/system64/.nimble/pkgs2/imguin-1.91.4.0-d2351593496ca43b2f019cdaba21a66f5b7e0bed/imguin/cimgui.nim(79, 12) Error: cannot find: \home\system64\.nimble\pkgs2\imguin-1.91.4.0-d2351593496ca43b2f019cdaba21a66f5b7e0bed\imguin\private\cimgui\cimgui.cpp

Seems it messes up with the "/".

[dinau]

Hi,
I have not tried to cross compilation for Windows OS on Linux OS.
Would you try this ?
Cross compilation to Windows, linker error (unrecognized option '-z'

https://nim-lang.org/docs/nimc.html#crossminuscompilation-for-windows

I'll try this later.

[system64MC]

Hi, I have not tried to cross compilation for Windows OS on Linux OS. Would you try this ? Cross compilation to Windows, linker error (unrecognized option '-z'

https://nim-lang.org/docs/nimc.html#crossminuscompilation-for-windows

I'll try this later.

It still doesn't work sadly.

[system64MC]

nim compile --os:windows glfw_opengl3.nim

Hi, I have not tried to cross compilation for Windows OS on Linux OS. Would you try this ? Cross compilation to Windows, linker error (unrecognized option '-z'
https://nim-lang.org/docs/nimc.html#crossminuscompilation-for-windows
I'll try this later.

It still doesn't work sadly.

Some progress!
I noticed that if I add ".replace("\", "/")" after each joinPath statement, it solve the errors. A way to solve this might be to create a function that changes the path only if we compile from a Linux to Windows
like joinPath(ImguiRootPath,"backends","imgui_impl_glfw.cpp").replaceIfWeAreOnLinux("\", "/")

However I also have another error : /home/system64/.nimble/pkgs2/imguin-1.91.4.0-d2351593496ca43b2f019cdaba21a66f5b7e0bed/imguin/private/cimgui/imgui/backends/imgui_impl_glfw.cpp:102:10: fatal error: GLFW/glfw3.h
Which means it can't find GLFW/glfw3.h (however everything works fine when I compile from Linux to Linux).

[dinau]

I can successfully generated Windows exe file using your idea and it works well on Windows OS.

it can't find GLFW/glfw3.h (however everything works fine when I compile from Linux to Linux).

This error can be silent by changing cimgui.nim line 56,

from

{.passC:"-I" & joinPath(staticExec("nimble path nimgl").strip,"nimgl","private","glfw","include").}

to

{.passC:"-I" & joinPath(staticExec("nimble path nimgl").strip,"nimgl","private","glfw","include").replace("\\", "/").}

I've executed this command,

nim c -d:release -d:strip -d:mingw --passL:-lstdc++ glfw_opengl3.nim 

[system64MC]

nim c -d:release -d:strip -d:mingw --passL:-lstdc++ glfw_opengl3.nim 

It works! It also works with --os;windows!
I think we have found and solved the issue!

[dinau]

Thank you for your interesting idea.

[system64MC]

Thank you for your interesting idea.

You are welcome! Do you want me to try to do a pull request with the changes I suggested?

[dinau]

I would appreciate your PR.

[system64MC]

I would appreciate your PR.

Alright! I will do this once I'm back home.

I also try to add ImGui-knobs, an addon for Dear ImGui that adds... Knobs.
I achieved to make a C interface, however should I add the Nim procs manually or is there something to do to generate them automatically?

[dinau]

I think you should make for instance cimknobs repository that has imgui-knobs project as submodule.

`-- cimknobs
    |-- cimknobs.h
    |-- examples
    |   `-- main.c
    |   `-- Makefile or CMakeLists.txt
    `-- imgui-knobs
        `__ ...
        `__ ...

I will fetch your cimknobs project to Imguin project same as cimgui/cimplot/... etc.
and I wiil add to cimgui.nim,

  when defined(ImKnobsEnable):
    {.passC:"-I" & CImKnobRootPath.}
    ...snip...

Nim header file of cimknobs will be auto generated by futhark and included incimgui.nim.

Build command may be

pwd 
imguin/examples/imknobs_opengl3
nim c -d:ImKnobsEnable imknobs_opengl3.nim

[system64MC]

I think you should make for instance cimknobs repository that has imgui-knobs project as submodule.

`-- cimknobs
    |-- cimknobs.h
    |-- examples
    |   `-- main.c
    |   `-- Makefile or CMakeLists.txt
    `-- imgui-knobs
        `__ ...
        `__ ...

I will fetch your cimknobs project to Imguin project same as cimgui/cimplot/... etc. and I wiil add to cimgui.nim,

  when defined(ImKnobsEnable):
    {.passC:"-I" & CImKnobRootPath.}
    ...snip...

Nim header file of cimknobs will be auto generated by futhark and included incimgui.nim.

Build command may be

pwd 
imguin/examples/imknobs_opengl3
nim c -d:ImKnobsEnable imknobs_opengl3.nim

I added cimgui knobs into my Imguin fork like what you did for the others ImGUI extensions. Is that OK?
I also sent a pull request.

[dinau]

Thank you PR.
I'll check that and merge within a few days.

[dinau]

Done.

[system64MC]

Done.

Thanks! I will have a look!

Do you also know how I can statically link the glibc / glibc++ or how I can use musl please? I'm concerned about compatibility with older Linux distros.

[dinau]

I'm not familiar with static link on Linux,
but I know it generally is very difficult on Linux :-)

• First
  Whether can this example be compiled or not on Linux with static link,
  cimgui:example_glfw_opengl3
• Second
  If an application uses the nimble libraries, at least the libraires have to be appropriately compiled with static link option on Linux.