Modify python-config.py or replace it with official one to support python3

  ok.that is,and here is my patch.
Tested with autoconf 2.69 and python3.8.


index:gdb/configure.ac
   else

Christian Biesinger <cbiesinger@google.com> 于2020年1月21日周二 上午8:30写道：
>
> On Mon, Jan 20, 2020 at 8:05 AM 傅继晗 <fjhhz1997@gmail.com> wrote:
> >
> > The formal patch only works on OSX.And here is the patch to make the
> > crossbuild available.
>
> configure is a generated file. Please edit configure.ac instead, and
> run autoconf to regenerate configure. Make sure to use autoconf
> version 2.69.
>
> Christian
>
> > diff --git a/gdb/configure-origin b/gdb/configure
> > --- a/gdb/configure-origin
> > +++ b/gdb/configure
> > @@ -9858,21 +9858,21 @@ fi
> > # We have a python program to use, but it may be too old.
> > # Don't flag an error for --with-python=auto (the default).
> > have_python_config=yes
> > - python_includes=`${python_prog} ${srcdir}/python/python-config.py --includes`
> > + python_includes=`${python_prog}-config --includes`
> > if test $? != 0; then
> > have_python_config=failed
> > if test "${with_python}" != auto; then
> > as_fn_error "failure running python-config --includes" "$LINENO" 5
> > fi
> > fi
> > - python_libs=`${python_prog} ${srcdir}/python/python-config.py --ldflags`
> > + python_libs=`${python_prog}-config --ldflags`
> > if test $? != 0; then
> > have_python_config=failed
> > if test "${with_python}" != auto; then
> > as_fn_error "failure running python-config --ldflags" "$LINENO" 5
> > fi
> > fi
> > - python_prefix=`${python_prog} ${srcdir}/python/python-config.py --exec-prefix`
> > + python_prefix=`${python_prog}-config --exec-prefix`
> > if test $? != 0; then
> > have_python_config=failed
> > if test "${with_python}" != auto; then
> >
> >
> > 傅继晗 <fjhhz1997@gmail.com> 于2020年1月20日周一 下午8:02写道：
> > >
> > > By default,gdb is compiled with python2 script support on OSX. However,when compiled with arg "--with-python=/path/to/python3 " to support python3 ,some error occurred that seems python3 is not recognized.
> > > The reason is that the python-config.py is not the same as the official one.BTW,this issue was once referred at 20 Dec 2012 mail :https://sourceware.org/ml/gdb-patches/2012-12/msg00751.html.
> > > Somehow,It is not committed(maybe the maintainer forgot it due to the happy chrismas holiday).
> > > And here is my patch:
> > >
> > > index: b/gdb/python/python-config.py
> > > ===============================
> > > --- a/gdb/python/python-config.py
> > > +++ b/gdb/python/python-config.py
> > > @@ -72,7 +72,7 @@ for opt in opt_flags:
> > >                      libs.insert(0, '-L' + getvar('LIBPL'))
> > >                  elif os.name == 'nt':
> > >                      libs.insert(0, '-L' + sysconfig.PREFIX + '/libs')
> > > -            if getvar('LINKFORSHARED') is not None:
> > > +            if not getvar('PYTHONFRAMEWORK'):
> > >                  libs.extend(getvar('LINKFORSHARED').split())
> > >          print (to_unix_path(' '.join(libs)))