[lldb-dev] [Bug 23221] New: Problem loading plugin via Python API when LLDB is compiled with clang, but the plugin with GCC

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23221

            Bug ID: 23221
           Summary: Problem loading plugin via Python API when LLDB is
                    compiled with clang, but the plugin with GCC
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at cs.uiuc.edu
          Reporter: sivachandra at gmail.com
    Classification: Unclassified

Loading a plugin fails if all of:

1. LLDB is compiled with clang
2. Plugin is compiled with GCC
3. Load the plugin via Python API

This can seen with TestPluginCommands. If we build LLDB with clang and run the
test with:

./dotest.py -C gcc -executable=<path_to_llvm_build>/bin/lldb -t -p
TestPluginCommands

it fails with this error:

python: symbol lookup error:
<path_to_lldb_src>/test/functionalities/plugins/commands/libplugin.so:
undefined symbol: _ZN4lldb10SBDebugger21GetCommandInterpreterEv

If we replace #3 with "plugin load" command, it works. In other words, if we
manually run all the steps in TestPluginCommands, everything works.

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