These changes break building of Python 3.* in some locales in Gentoo.

running build
running build_ext
Traceback (most recent call last):
  File "./setup.py", line 1812, in <module>
    main()
  File "./setup.py", line 1807, in main
    "Tools/scripts/2to3"]
  File "/var/tmp/portage/dev-lang/python-3.2_pre20100711/work/Python-3.2_pre20100711/Lib/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/var/tmp/portage/dev-lang/python-3.2_pre20100711/work/Python-3.2_pre20100711/Lib/distutils/dist.py", line 946, in run_commands
    self.run_command(cmd)
  File "/var/tmp/portage/dev-lang/python-3.2_pre20100711/work/Python-3.2_pre20100711/Lib/distutils/dist.py", line 965, in run_command
    cmd_obj.run()
  File "/var/tmp/portage/dev-lang/python-3.2_pre20100711/work/Python-3.2_pre20100711/Lib/distutils/command/build.py", line 127, in run
    self.run_command(cmd_name)
  File "/var/tmp/portage/dev-lang/python-3.2_pre20100711/work/Python-3.2_pre20100711/Lib/distutils/cmd.py", line 315, in run_command
    self.distribution.run_command(command)
  File "/var/tmp/portage/dev-lang/python-3.2_pre20100711/work/Python-3.2_pre20100711/Lib/distutils/dist.py", line 965, in run_command
    cmd_obj.run()
  File "/var/tmp/portage/dev-lang/python-3.2_pre20100711/work/Python-3.2_pre20100711/Lib/distutils/command/build_ext.py", line 393, in run
    self.build_extensions()
  File "./setup.py", line 151, in build_extensions
    missing = self.detect_modules()
  File "./setup.py", line 539, in detect_modules
    for ln in fp:
  File "/var/tmp/portage/dev-lang/python-3.2_pre20100711/work/Python-3.2_pre20100711/Lib/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc5 in position 20: ordinal not in range(128)
make: *** [sharedmods] Error 1

In lt_LT.UTF-8 locale, readline_termcap_lib file contains:
	ne dinaminis paleidžiamasis failas

In en_US.UTF-8 locale, this file would contain:
	not a dynamic executable

do_readline is "/usr/lib64/libreadline.so".

/usr/lib64/libreadline.so is a linker script with the following content:
/* GNU ld script
   Since Gentoo has critical dynamic libraries in /lib, and the static versions
   in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
   run into linking problems.  This "fake" dynamic lib is a linker script that
   redirects the linker to the real lib.  And yes, this works in the cross-
   compiling scenario as the sysroot-ed linker will prepend the real path.

   See bug http://bugs.gentoo.org/4411 for more info.
 */
OUTPUT_FORMAT ( elf64-x86-64 )
GROUP ( /lib64/libreadline.so.6 )

I think that using ldd is a wrong idea.