-1. Qt/Mac Free Edition, version 4. This library is GPL-licensed
-and can be downloaded from
-<http://www.trolltech.com/download/qt/mac.html>. You will need to
-compile it yourself (as described below).
-
-2. automake, version 1.5 or higher (check with automake --version).
-Probably the easiest way to get this is to use DarwinPorts (from
-http://darwinports.opendarwin.org/getdp/) and install automake
-using
- sudo port install automake
-
-3. gettext version >= 0.12 (check with gettext --version)
-If the installed version is insufficient the
-easiest way to obtain a later version is to get DarwinPorts
-(from http://darwinports.opendarwin.org/getdp/) and install gettext
-using
+Note: Only Qt/Mac is needed for building official LyX releases, and
+so steps 2 and 3 can be skipped in these cases. Those wanting to
+build developmental versions must have automake and gettext as
+well.
+
+1. Qt/Mac Opensource Edition, version 4.
+
+This library is GPL-licensed and can be downloaded from
+<http://trolltech.com/developer/downloads/qt/mac/>.
+An alternative location is <ftp://ftp.qt.nokia.com/qt/source>.
+To compile it, create a directory where you want to install Qt4.
+In the following, the full path to this directory is called /path/to/Qt4
+Decompress Qt/Mac in a convenient directory, cd to the top of the
+Qt source hierarcy, and enter:
+
+ ./configure -opensource -silent -shared -release -universal -fast \
+ -no-exceptions -no-webkit -no-qt3support -no-javascript-jit -no-dbus \
+ -nomake examples -nomake demos -nomake docs \
+ -nomake tools -no-framework \
+ -prefix /path/to/Qt4
+ make
+ make install
+
+This will result in an Qt library set for i386 and ppc applications.
+
+To build Qt with Tiger support run configure with:
+
+ CC=gcc-4.0 OBJC=gcc-4.0 CXX=g++-4.0 \
+ ./configure -opensource -silent -shared -release -universal -fast \
+ -sdk /Developer/SDKs/MacOSX10.4u.sdk \
+ -no-exceptions -no-webkit -no-qt3support -no-javascript-jit -no-dbus \
+ -nomake examples -nomake demos -nomake docs \
+ -nomake tools -no-framework \
+ -prefix /path/to/Qt4
+
+To build the libraries with 64bit architecture you have to replace the
+"-universal" option with "-arch x86_64". Note: you cannot build Qt with
+32bit and 64bit mixed architecture mode. (At least not with Qt4.6)
+And the build with 64bit has known problems - so it's not recommended.
+
+Furthermore Apples developer documentation states:
+"Although 64-bit executables make it easier for you to manage large
+data sets ..., the use of 64-bit executables may raise other issues.
+Therefore you should transition your software to a 64-bit executable
+format only when the 64-bit environment offers a compelling advantage
+for your specific purposes."
+
+
+2. [Needed only for developmental builds:] automake, version 1.10.1
+or higher (check with automake --version). Probably the easiest
+way to get this is to use MacPorts (from http://www.macports.org/)
+and install automake using
+
+ sudo port install automake
+
+
+3. [Needed only for developmental builds:] gettext version >= 0.18
+(check with gettext --version). If the installed version is
+insufficient the easiest way to obtain a later version is to use
+MacPorts (from http://www.macports.org/) and install gettext
+using:
+