version: 8b
source: http://www.ijg.org/

parallel: OK

This is a part of my UnixImageIO framework. A script is available to build the framework from sources.

There are many different implementations now, probably due to the original IJG source being a "reference" and not updated since 1998. It looks like the new 8b version came from jpegclub.org. There is also a version maintained by the GDAL author, which includes compile switches to build a 12bit libjpeg alongside the standard 8bit version, and the UnixImageIO framework build uses this. The instructions below are for the new IJG version.

in the jpeg source:

export MACOSX_DEPLOYMENT_TARGET=10.6
./configure --disable-dependency-tracking --enable-shared --disable-static \
CFLAGS="-Os -arch i386 -arch x86_64"
make
sudo make install

in the jpeg source:

export MACOSX_DEPLOYMENT_TARGET=10.5
./configure --disable-dependency-tracking --enable-shared --disable-static \
CFLAGS="-Os -arch ppc -arch i386 -arch ppc64 -arch x86_64"
make
sudo make install

in the jpeg source:

export MACOSX_DEPLOYMENT_TARGET=10.4
./configure --disable-dependency-tracking --enable-shared --disable-static \
CFLAGS="-Os -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk"
make
sudo make install

Old Panther notes.

Something you can do if you want - a patch for a certain type of malformed jpeg-in-tiff created by old Wang software, pretty obscure. You can skip this if you like. You need the libtiff source for this patch: in the libtiff source /contrib/ojpeg, copy the contents of jdhuff_add.c and paste it at the end of the jpeg source jdhuff.c. There is nothing to configure here, the rest will be taken care of in libtiff.

$ ./configure --enable-shared --enable-static
$ make
$ sudo make install