Update gdbinit

[jinger7281]

fix wrong path of libstdcxx python script
If the version number of gcc was updated, but this script was not update the variable of %GCC_NAME% which will lead an error of missing libstdcxx module
This update use python script to search the real path of the gcc folder and insert it into the sys.path variable

[lazka]

Sounds good. One thing I noticed is that have multiple dirs left because of python cache files (we should try fix this with the next gcc update).

$ echo /usr/share/gcc*
/usr/share/gcc-11.3.0 /usr/share/gcc-13.2.0 /usr/share/gcc-13.3.0

A hacky workaround is to sort the dirs, which is a good idea anyway since listdir order isn't stable.

What about:

import sys
import glob
python_dirs = sorted(glob.glob("/usr/share/gcc*/python"), reverse=True)
sys.path.insert(0, (python_dirs or [sys.path[0])[0])

[lazka]

Or we add a big warning to the gcc build file that gdb needs to be rebuilt on version changes.

[lazka]

I've created #4748 as an alternative

[jinger7281]

@lazka

Sounds good. One thing I noticed is that have multiple dirs left because of python cache files (we should try fix this with the next gcc update).

$ echo /usr/share/gcc*
/usr/share/gcc-11.3.0 /usr/share/gcc-13.2.0 /usr/share/gcc-13.3.0

A hacky workaround is to sort the dirs, which is a good idea anyway since listdir order isn't stable.

What about:

import sys
import glob
python_dirs = sorted(glob.glob("/usr/share/gcc*/python"), reverse=True)
sys.path.insert(0, (python_dirs or [sys.path[0])[0])

This may be a good idea. Some newbies like me are always confused about the prompt, and don't know how to deal with this, we added this method to provide a way for newbies to easily use it.

> import sys
> import glob
> python_dirs = sorted(glob.glob("/usr/share/gcc*/python"), reverse=True)
> sys.path.insert(0, (python_dirs or sys.path)[0])