In order to install FLORIST, you should go through the following
steps.

0. Make sure you have GNAT installed.
   Note that to use Florist, you need to either use a GNAT run time based on
   native threads (see README.TASKING in the GNAT distribution for more details)
   or use the --disable-threads option at configure time below:

1. Configure FLORIST by typing "./configure".
   You probably should capture the output, in case something goes
   wrong and the relevant error message scrolls off your screen,
   e.g.
        ./configure >& configure.log

   If you are using a GNAT run time that is not using native OS threads
   (e.g athread under IRIX o32 or DCE threads under HPUX 11.0), you need
   to specify the --disable-threads option:

        ./configure --disable-threads >& configure.log

   Note that disabling thread support will remove support for the following
   packages that depend on threads:

     - POSIX.Asynchronous_IO
     - POSIX.Condition_Variables
     - POSIX.Message_Queues
     - POSIX.Mutexes
     - POSIX.Process_Primitives
     - POSIX.Process_Signals
     - POSIX.Timers

   The configure script will try to find out information about the system
   you are using.  This includes information about the GNAT version,
   and whether each of the features of the POSIX C-language interfaces
   is supported.  This step generates the files:

   Makefile              Florist make file
   gnatprep.config       directives for gnatprep
   pconfig.h             #includes and #defines needed to use POSIX
   config.h              configuration for c-posix.c

   Note that if "configure" does not work for your system as-is,
   you can tailor it by editing the file "pconfig.h.in".
   Some examples of these can be found in the "configs" subdirectory.

   Along the way, configure will tell you about the various
   features it is checking, and whether it finds
   them.  Don't worry if it fails to find some features.
   That is normal, since no operating system we know has yet
   fully caught up to the POSIX standards.  Assuming the configuration
   process works correctly, the unsupported features will just
   raise POSIX_Error if you try to use them.

   The POSIX.1g (sockets and XTI) interfaces are still very new, and
   not supported widely; the configure stage will attempt to work around
   missing features.  If it fails badly, you can still build the rest of
   Florist.  (One should not be using the POSIX.5c interfaces anyway,
   as explained above.)

   NOTE:  Do not delete the empty file "florist_sources".  The configure
   script checks for this file, to make sure it is in the right source
   directory.

2. Build and compile FLORIST by typing "make".  This will
   *automatically* perform many operations, including the following:

  a. Compile and execute the program "c-posix.c", which
     generates the source code for the Ada package specifications
     Posix, Posix.C, Posix.Limits, and Posix.Options.

  b. Compile several C-language programs "XXX-macros.c".

  c. Use gnatprep to tailor some Ada source files to your system.

  d. Compile the various POSIX Ada package specifications and
     bodies.

3. If this all succeeds, you can now use Florist.