On linux-g++-32 with command line `./configure --enable-ipv6 --with-
suffix=3`, python is compiled okay but the build scripts fail as 
follows:-

running build_scripts
copying and adjusting /tmp/Python-3.0/Tools/scripts/idle -> build/
scripts-3.0
Traceback (most recent call last):
  File "./setup.py", line 1533, in <module>
    main()
  File "./setup.py", line 1528, in main
    'Lib/smtpd.py']
  File "/tmp/Python-3.0/Lib/distutils/core.py", line 149, in setup
    dist.run_commands()
  File "/tmp/Python-3.0/Lib/distutils/dist.py", line 942, in 
run_commands
    self.run_command(cmd)
  File "/tmp/Python-3.0/Lib/distutils/dist.py", line 962, in run_command
    cmd_obj.run()
  File "/tmp/Python-3.0/Lib/distutils/command/build.py", line 128, in 
run
    self.run_command(cmd_name)
  File "/tmp/Python-3.0/Lib/distutils/cmd.py", line 317, in run_command
    self.distribution.run_command(command)
  File "/tmp/Python-3.0/Lib/distutils/dist.py", line 962, in run_command
    cmd_obj.run()
  File "/tmp/Python-3.0/Lib/distutils/command/build_scripts.py", line 
51, in run
    self.copy_scripts()
  File "/tmp/Python-3.0/Lib/distutils/command/build_scripts.py", line 
108, in copy_scripts
    + sysconfig.get_config_var("EXE")),
TypeError: Can't convert 'int' object to str implicitly
make: *** [sharedmods] Error 1

The cause is that distutils.sysconfig.parse_makefile() tries to convert
each value to an int, and does succeed on "--with-suffix=3".

The attached patch uses %s formatting to build the program name, this
will accept int values.
All versions are affected.

In hindsight I did not need to use --with-suffix as I assumed the 
interpreter would be installed as "python" by default, but it is not. 
The patch however does fix the reported problem for me.

I will write an isolated test in distutils to reproduce this issue,

fixed in r69598. Thanks for the patch Amaury.