Recent changes to either configure or setup.py seem to
have conspired to prevent the readline module from
building on MacOSX.  I configured and built with

    LDFLAGS='-L/sw/lib' CPPFLAGS='-I/sw/include' ../
configure '--prefix=/Users/skip/local'
    make

The relevant readline bits are in /sw/... but the
module is not built.  The following bits containing
/sw grep out of the generated Makefile:

    INSTALL=        /sw/bin/install -c
    CPPFLAGS=       -I. -I$(srcdir)/Include -I/sw/include
    LDFLAGS=        -L/sw/lib
    CONFIG_ARGS=    '--prefix=/Users/skip/local' 
'CPPFLAGS=-I/sw/include' 'LDFLAGS=-L/sw/lib'

Assigning to Brett since he touched this most recently.

Skip

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More on this...  Sticking a print of lib_dirs just before setup.py
checks for readline shows that /sw/lib is not in that list.

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I have uploaded a patch to add some debugging output.  Can you run 
make and let me know what it outputs (might need to touch a file to 
trigger the need for setup.py to execute)?  I need to know exactly what 
the environment variables are set to when they are parsed and what 
setup.py ends up with for its library and include directories.

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I was able to reproduce the problem of the environment variable 
returning None for a short time (it for some reason stopped doing that 
and started to do what I expected).  While I could, though, I was able to 
get the right values using distutils.sysconfig.get_config_var().

The attached file adds a little bit more debugging output and also 
switches over to using distutils.sysconfig.get_config_var() instead of 
sys.getenv().  Let me know if that fixes the problem.

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That worked...  Thanks... (check it in?)

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Checked in under rev. 1.209 in setup.py .