Public bug reported:
On Ubuntu 14.04.2 (Trusty), the file in libstdc++6-4.8-dbg to auto-load
the pretty printers doesn't resolve the right path to the printers. To
reproduce, on a fresh install:
$ cat test.cpp
#include <vector>
int main() {
std::vector<int> v;
v.push_back(1);
return 0;
}
$ g++ test.cpp -g
$ gdb a.out -ex start
Reading symbols from a.out...done.
Temporary breakpoint 1 at 0x400956: file test.cpp, line 3.
Starting program: /home/emaisin/a.out
Traceback (most recent call last):
File "/usr/lib/debug/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py",
line 63, in <module>
from libstdcxx.v6.printers import register_libstdcxx_printers
ImportError: No module named 'libstdcxx'
Temporary breakpoint 1, main () at test.cpp:3
3 std::vector<int> v;
(gdb)
It seems like the fixup for multiarch actually adds an extra "..":
if not os.path.basename(os.path.dirname(__file__)).startswith('lib'):
backdirs += 1 # multiarch subdir
Removing these two lines almost makes it work:
$ gdb a.out -ex start
Reading symbols from a.out...done.
Temporary breakpoint 1 at 0x400956: file test.cpp, line 3.
Starting program: /home/emaisin/a.out
Traceback (most recent call last):
File "/usr/lib/debug/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py",
line 63, in <module>
from libstdcxx.v6.printers import register_libstdcxx_printers
File
"/usr/lib/x86_64-linux-gnu/../../share/gcc-4.8/python/libstdcxx/v6/printers.py",
line 54
raise ValueError, "Cannot find type %s::%s" % (str(orig), name)
^
SyntaxError: invalid syntax
Temporary breakpoint 1, main () at test.cpp:3
3 std::vector<int> v;
That last problem is tracked in bug #1256419, which is still a pending issue in
Trusty.
** Affects: gcc-4.8 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1446828
Title:
gdb pretty printers do not auto-load on Trusty
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