OpenEXR on MacOS X

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Building OpenEXR on MacOS X is just like building it on GNU/Linux.

Follow the instructions in the README file under BUILDLING OPENEXR,

but see below re: shared libraries.

Missing gnu automake tools on  Mac OS X 10.8+

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Later versions of OS X ,10.8+, do not, by default have all the necessary 

tools for building. In particular,  Autoconf and Automake may be missing. 

The following commands will download and install the necessary components:

cd ~/myDevLoc

curl -OL http://ftpmirror.gnu.org/autoconf/autoconf-2.64.tar.gz

tar xzf autoconf-2.64.tar.gz

cd autoconf-2.64

./configure --prefix=~/myDevLoc/autotools-bin

make; make install

cd ~/myDevLoc

curl -OL http://ftpmirror.gnu.org/automake/automake-1.12.tar.gz

tar xzf automake-1.12.tar.gz

cd automake-1.12

./configure --prefix=~/myDevLoc/autotools-bin

make; make install

cd ~/myDevLoc

curl -OL http://ftpmirror.gnu.org/libtool/libtool-2.4.tar.gz

tar xzf libtool-2.4.tar.gz

cd libtool-2.4

./configure --prefix=~/myDevLoc/autotools-bin

make; make install

You may want to export the installation path for your convenience.

Finally, make sure that you have installed the command line tools for XCode.

Universal Builds on Mac OS X

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On OS X 10.4, you can build universal binaries by passing

'--enable-osx-universal-binaries --disable-dependency-tracking' to the

configure script.  The default is *not* to build universal binaries.

Shared libraries

----------------

OpenEXR requires the "flat namespace" option when built as a shared

library.  You may have problems trying to use OpenEXR shared libraries

with applications that expect OS X's two-level namespace.  We have not

tested the shared libs extensively, though they appear to work with

exrdisplay and exrheader, but use them at your own risk.  We will

support two-level namespace shared libs in a future release.