[lldb-dev] [Bug 16183] New: LLDB finds incorrect python version if python 3 is installed (Arch Linux)

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=16183

            Bug ID: 16183
           Summary: LLDB finds incorrect python version if python 3 is
                    installed (Arch Linux)
           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: daniel.malea at intel.com
    Classification: Unclassified

The LLDB SWIG scripts only support python 2. When trying to run with python 3,
the following error occurs:

File "<string>", line 1
     from distutils.sysconfig import get_python_lib; print
get_python_lib(True, False, "/tmp/llvm/build");

Due to:

  <lldb_dir>/scripts/Python/build-swig-Python.sh
and
  <lldb_dir>/scripts/Python/build-swig-Python-LLDB.sh

scripts using "usr/bin/env python" to locate the right python executable. On
Arch Linux, where python 3 is the default, the correct way to find python is by
doing "/usr/bin/env python2" however "python2" is not installed on Mac OS X...
So to keep things working on multiple platforms,  propagating the LLVM CMake
variable "PYTHON_EXECUTABLE" to the scripts above is the right approach.

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