[Image-SIG] error: conflicting types for ‘ImagingJpegDecode’ while installing PIL on Mac OS

[Steve Strassmann]

Hi, I'm trying to install Imaging 1.1.7 on Mac OS 10.6.8 with python 2.6.
I've already installed jpeg-6b, which seems to be ok ('make check' seems to run without errors).

I have tried both 'python setup.py install' and 
pip install http://effbot.org/downloads/Imaging-1.1.7.tar.gz
and I get the same error (snip 1 below) either way. Does anyone know how I can get past this?

When I run ./BUILDME (see snip 2 below), setup seems to claim that "JPEG support available"
but selftest seems to claim "JPEG support not installed". That seems odd to me.

thanks, 
Steve

--- snip 1 ---
gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -pipe -arch x86_64 -DHAVE_LIBJPEG -DHAVE_LIBZ -I/System/Library/Frameworks/Tcl.framework/Headers -I/System/Library/Frameworks/Tk.framework/Headers -IlibImaging -I/System/Library/Frameworks/Python.framework/Versions/2.6/include -I/usr/local/include -I/usr/include -I/System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6 -c libImaging/JpegDecode.c -o build/temp.macosx-10.6-universal-2.6/libImaging/JpegDecode.o

libImaging/JpegDecode.c:119: error: conflicting types for ‘ImagingJpegDecode’
libImaging/Imaging.h:416: error: previous declaration of ‘ImagingJpegDecode’ was here
libImaging/JpegDecode.c: In function ‘ImagingJpegDecode’:
libImaging/JpegDecode.c:145: warning: assignment from incompatible pointer type
libImaging/JpegDecode.c:151: error: invalid operands to binary - (have ‘const JOCTET *’ and ‘UINT8 *’)
libImaging/JpegDecode.c:237: warning: passing argument 1 of ‘state->shuffle’ from incompatible pointer type
libImaging/JpegDecode.c:262: error: invalid operands to binary - (have ‘const JOCTET *’ and ‘UINT8 *’)
error: command 'gcc-4.2' failed with exit status 1

--- snip 2 ---

--------------------------------------------------------------------
PIL 1.1.7 SETUP SUMMARY
--------------------------------------------------------------------
version       1.1.7
platform      darwin 2.6.1 (r261:67515, Jun 24 2010, 21:47:49)
              [GCC 4.2.1 (Apple Inc. build 5646)]
--------------------------------------------------------------------
--- TKINTER support available
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
*** FREETYPE2 support not available
*** LITTLECMS support not available
--------------------------------------------------------------------
To add a missing option, make sure you have the required
library, and set the corresponding ROOT variable in the
setup.py script.

To check the build, run the selftest.py script.
--------------------------------------------------------------------
PIL 1.1.7 TEST SUMMARY
--------------------------------------------------------------------
Python modules loaded from ./PIL
Binary modules loaded from ./PIL
--------------------------------------------------------------------
--- PIL CORE support ok
--- TKINTER support ok
*** JPEG support not installed
--- ZLIB (PNG/ZIP) support ok
*** FREETYPE2 support not installed
*** LITTLECMS support not installed
--------------------------------------------------------------------