Okay, so I've built all (so far as I can tell) the ports I need using MacPorts, thanks again to the folks on this list. So I cd in OS X Terminal to the gimp-2.6.6-dev (my copy of gimp-2.6.6) folder and run configure.

First it complains I have no TIFF library. Well, I don't use TIFF so I reran with ./configure --without-libtiff

Result:

checking for jpeg_destroy_decompress in -ljpeg... no configure: WARNING: *** XJT plug-in will not be built (JPEG library not found) ***
configure: error:
*** Checks for JPEG library failed. You can build without it by passing *** --without-libjpeg to configure but you won't be able to use JPEGs then.

???? I use JPEG images, so that will never do. So I go nosing around.

echo $PATH per MacPorts gives
/opt/local/bin:/opt/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin

I look at configure, and it's looking for /${exec_prefix}/lib where /${exec_prefix}=NONE.

jpeglib.h (which does define jpeg_destroy_decompress) is in /opt/local/include
while /opt/local/lib contains
libjpeg.a
libjpeg.dylib
libjpeg.la
libjpeg.62.dylib
libjpeg.62.0.0

I tried changing configure such that exec_prefix=/opt/local and re-ran in but got the same error.

Anyone know what's up?

Charles Belov

Date: Tue, 31 Mar 2009 11:09:35 -0400 From: M Gagnon
Subject: Re: [Gimp-developer] OS X GIMP configure can't find JPEG library To: gimp-developer@lists.XCF.Berkeley.EDU

You will very likely need to fiddle with environment variables to help configure find it.
Especially check PKG_CONFIG_PATH

Thanks, that got me a bit further in my investigations.

PKG_CONFIG_PATH was blank. I set it to /opt/local/lib/pkgconfig with the same result. Then I noticed that among the many libraries in that directory, libjpeg.pc and libtiff.pc were not among them, although libpng.pc was.

So I ran Onyx to make sure locate was up to date and interestingly:

$ locate .pc | grep 'png' /opt/local/lib/pkgconfig/cairo-png.pc /opt/local/lib/pkgconfig/libpng.pc
/opt/local/lib/pkgconfig/libpng12.pc /opt/local/var/macports/software/cairo/1.8.6_4+macosx/opt/local/lib/pkgconfig/cairo-png.pc /opt/local/var/macports/software/libpng/1.2.35_0/opt/local/lib/pkgconfig/libpng.pc /opt/local/var/macports/software/libpng/1.2.35_0/opt/local/lib/pkgconfig/libpng12.pc $ locate .pc | grep 'jp'
$ locate .pc | grep 'tiff'
$

Yeah, no .pc files for libjpeg or libtiff.

And its apparently a feature, not a bug--I've seen posts saying that the JPEG folks never creating a .pc file for libjpeg.

So then the question is how do I point configure to one of the following directories for libjpeg?

/opt/local/var/macports/software/jpeg/6b_3/opt/local/lib/ /opt/local/lib/
/Applications/Gimp.app/Contents/Resources/ (this appears to be the resource fork of Gimp.app, which was installed from the .dmg file)

I tried sticking /opt/local/lib on the end of both PATH and PKG_CONFIG_PATH and that didn't help either.

LD_LIBRARY_PATH=/opt/local/bin PATH=/opt/local/bin:/opt/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/opt/local/lib PKG_CONFIG_PATH=/opt/local/lib/pkgconfig:/opt/local/lib

All to no avail. Any further ideas? Charles Belov