GDB: ImportError: No module named libstdcxx.v6.printers

Question

I have MSYS2 and MinGW64 installed under Windows 7.

gdb reports "ImportError: No module named libstdcxx.v6.printers":

$ gdb  
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Traceback (most recent call last):  
  File "<string>", line 3, in <module>  
ImportError: No module named libstdcxx.v6.printers  
/etc/gdbinit:6: Error in sourced command file:  
Error while executing Python code.  
(gdb) quit

I have found several links:

Import Error: No module name libstdcxx

ImportError: No module named 'libstdcxx' while debuging project with ncurses

How to enable gdb pretty printing for C++ STL objects in Eclipse CDT?

https://askubuntu.com/questions/345873/gdb-crashes-with-importerror-no-module-named-libstdcxx-v6-printers

https://github.com/Alexpux/MINGW-packages/issues/383

but none of them helps.

Update:

There are 2 gdbinit.

C:\Appl\msys64\etc\gdbinit:

python
import sys
sys.path.insert(0, sys.path[0] + '/../../gcc-6.3.0/python')
from libstdcxx.v6.printers import register_libstdcxx_printers
register_libstdcxx_printers (None)
end

C:\Appl\msys64\mingw64\etc\gdbinit:

python
import sys
sys.path.insert(0, sys.path[0] + 'C:/Appl/msys64/mingw64/share/gcc-7.1.0/python')
from libstdcxx.v6.printers import register_libstdcxx_printers
end

@MarkPlotnick, I have found 2 of them. See the post updated. — KonstantinL, Aug 16 '17 at 08:18
Do you have a `libstdcxx` directory anywhere under your `C:/Appl/msys64` directory? It ought to be in `/gcc-/python/libstdcxx`. — Mark Plotnick, Aug 16 '17 at 15:22
@MarkPlotnick, found: C:\Appl\msys64\mingw64\share\gcc-7.1.0\python\libstdcxx; v6 subdir present and containing printers.py — KonstantinL, Aug 16 '17 at 15:24
Should I write something like `sys.path = 'C:/Appl/msys64/mingw64/share/gcc-7.1.0/python'`? — KonstantinL, Aug 16 '17 at 15:31
Try `sys.path.insert(0, 'C:/Appl/msys64/mingw64/share/gcc-7.1.0/python')` — Mark Plotnick, Aug 16 '17 at 16:19
@MarkPlotnick, it helped when I replaced the string in C:\Appl\msys64\etc\gdbinit. Thank you! — KonstantinL, Aug 17 '17 at 09:14
Out of curiosity, I'd like to see what `sys.path[0]` is, because both gdbinit files seem to think it should be some sort of MSYS base directory. Could you show the output of `gdb -nx -batch -ex "python import sys; print(sys.path[0])"` — Mark Plotnick, Aug 17 '17 at 19:57
OK. Then `C:\Appl\msys64\etc\gdbinit` probably has the correct contents, except for the GCC version number. If an update changes either that file or the installed version of GCC, you now know how to fix it. — Mark Plotnick, Aug 18 '17 at 11:59

score 1 · Answer 1 · answered Aug 19 '22 at 14:48

Thanks for KonstantinL's answer I also encountered this problem and solved it

my gcc version is 11.1 ，There is only one gdbinit at etc/gdbinit

And I found the libstdcxx library at /usr/share/gcc-11.3.0/python

Refer to KonstantinL's answer

Modify the gdbinit as “sys.path.insert(0, '/usr/share/gcc-11.3.0/python')”

GDB can run normally

Thanks for KonstantinL's answer

GDB: ImportError: No module named libstdcxx.v6.printers

1 Answers1