$Id$

This file tries to help building Wireshark for Mac OS X (Wireshark does
not work on earlier versions of Mac OS).

In order to build Wireshark, you must have X11 and the X11 developer
headers and libraries installed; otherwise, you will not be able to
build or install GTK+, and will only be able to build TShark.  The X11
and X11 SDK that come with Mac OS X releases starting with Panther are
sufficient to build and run Wireshark.

The changes to enable libwiretap and libwireshark being built as shared
libraries have broken shared gtk1 builds on Mac OS X.  The GLib 1.x and
GTK+ 1.x release tarballs were built with an older version of libtool
that didn't support shared libraries on Mac OS X, so you can't build and
install them as shared libraries, but the shared-library build of
Wireshark requires GLib and GTK+, on Mac OS X, to be shared libraries. 
The alternative to build Wireshark as one big statically linked binary
isn't working either (and may never have worked on this OS).

The way out of this situation is to use gtk2 and associated libraries
which is known to work in this constellation:

        GLib 2.4.0
        Pango 1.4.0
        GTK+ 2.4.0
        ATK 1.6.0

and the corresponding dependency, which you can download from the
"dependencies" subdirectory of the GTK+ download directory on the GTK+
FTP site:

	pkg-config

as well as GNU gettext, which isn't included in the directory of
dependencies on the GTK+ FTP site.

GTK+ can also be configured to include code to load various sorts of
images.  To do so, you would also need the following dependencies, also
available from the "dependencies" subdirectory of the GTK+ download
directory:

	jpegsrc
	libpng
	tiff

However, on Tiger and later releases, it appears that the libraries
built and installed by those packages collide with libraries that come
with the OS, so you might have to configure GTK+ not to support loading
those images (Wireshark doesn't use the ability to load JPEG, PNG, or
TIFF images), by using the "--without-libpng", "--without-libjpeg", and
"---without-libtiff" flags when running "configure" in the GTK+ source
directory.

NOTE: you must set the PKG_CONFIG_PATH environment variable to include
"/usr/X11R6/lib/pkgconfig" (unless you've already set it, set it to
"/usr/X11R6/lib/pkgconfig") before running the Pango configuration
script, so that it can be configured to use the version of fontconfig
that comes with Mac OS X's X11. This is also needed for the GTK+
configuration.

NOTE: you must install the pkg-config dependency first; unless it is
installed, you cannot configure GLib or GTK+.  After that, you must
install GNU gettext; only after both of those have been built and
installed will you be able to configure GLib.  After configuring and
installing GLib, configure, build, and install Pango, ATK, jpegsrc,
libpng, tiff, and GTK+, in order.  (The exact order might not be
important, but you must configure, build, and install Pango and ATK
before configuring GTK+ and, if you want GTK+ to be able to use the
capabilities from the other libraries, you must configure, build, and
install them before configuring GTK+.)

You will need to do "make install-lib" for the JPEG library to install
its libraries - "make install" does not suffice.  You will also have to
do "sudo ranlib /usr/local/lib/libjpeg.a" after "make install-lib".

For libpng, use scripts/makefile.darwin, not scripts/makefile.macosx.

Finally run the configure script. By default it will use
the GLib2 and GTK+2 libraries. If you run Wireshark's configure script
with the "--disable-gtk2" argument it'll try to configure with GLib
1.2[.x] and GTK+ 1.2[.x], in which case:

	if they're not installed, the configure script will fail;

	if they are installed, the configure script will configure
	Wireshark to build with them.

If you upgrade the major release of Mac OS X on which you are building
Wireshark, we advise that, before you do any builds after the upgrade,
you do, in the build directory:

    If you are building from a release tarball:
	make distclean

    If you are building from SVN:
	make maintainer-clean
	./autogen.sh

Then re-run the configure script and rebuild from scratch.

On Snow Leopard, if you are building on a machine with a 64-bit
processor (with the exception of the early Intel Core Duo and Intel Core
Solo machines, all Apple machines with Intel processors have 64-bit
processors), the C/C++/Objective-C compiler will build 64-bit by
default.

This means that you will, by default, get a 64-bit version of Wireshark.

One consequence of this is that, if you built and installed any required
or optional libraries for Wireshark on an earlier release of Mac OS X,
those are probably 32-bit versions of the libraries, and you will need
to un-install them and rebuild them on Snow Leopard, to get 64-bit
versions.

Some required and optional libraries require special attention if you
install them by building from source code on Snow Leopard:

GLib - the GLib configuration script determines whether the system's
libiconv is GNU iconv or not by checking whether it has libiconv_open(),
and the compile will fail if that test doesn't correctly indicate
whether libiconv is GNU iconv.  In Mac OS X, libiconv is GNU iconv, but
the 64-bit version doesn't have libiconv_open(); a workaround for this
is to replace all occurrences of "libiconv_open" with "iconv_open" in
the configure script before running the script.

libgcrypt - the libgcrypt configuration script attempts to determine
which flavor of assembler-language routines to use based on the platform
type determined by standard autoconf code.  That code uses uname to
determine the processor type; however, in Mac OS X, uname always reports
"i386" as the processor type on Intel machines, even Intel machines with
64-bit processors, so it will attempt to assemble the 32-bit x86
assembler-language routines, which will fail.  The workaround for this
is to run the configure script with the --disable-asm argument, so that
the assembler-language routines are not used.

PortAudio - when compiling on Darwin (e.g., on Mac OS X), the configure
script for the pa_stable_v19_20071207 version of PortAudio will cause
certain platform-dependent build environment #defines to be set in the
Makefile rules, and to cause a universal build to be done; those
#defines will be incorrect for all but one of the architectures for
which the build is being done, and that will cause a compile-time error
on Snow Leopard.  The current snapshot version of PortAudio still
defines those values in the Makefile, but it appears to use them in ways
that don't cause build problems; its configure script also has a
"--disable-mac-universal" flag that can cause the build not to be done
universal.