The current version of REXX/imc has been compiled and given at least a cursory
check on the following platforms.

 Hardware                  Operating System  Compiler                     Notes
 Intel Pentium             Red Hat Linux 5.1 gcc 2.7.2.3
 Intel Pentium II          Solaris 2.5       gcc 2.8.1, Sun Workshop cc 4.2
 Sun SPARCstation 2        Solaris 2.5.1     gcc 2.8.1, Sun Workshop cc 4.2
 Sun SPARC 10              SunOS 4.1.3       gcc 2.5.8, bundled cc          [2]
 DEC Alpha                 Digital Unix 4.0  gcc 2.7.2.2, DEC cc V5.6-075
 Silicon Graphics Indy     IRIX 6.2          gcc 2.8.1, Ragnarok cc 6.2
 Silicon G Power Challenge IRIX64 6.2        gcc 2.8.1, Ragnarok cc 6.2     [3]
 Silicon Graphics Octane   IRIX64 6.5        gcc 2.8.1, MIPSpro cc 7.2.1    [4]

Third parties have reported successful compilation on the following platforms.

 Hardware                  Operating System  Compiler
 i386 architecture         FreeBSD 2.2.7     gcc

Previous versions of REXX/imc have been compiled on the following
platforms.  It is hoped that they still work, but some twiddling may
be required especially since these are unlikely to be current operating
system versions.

 Hardware                  Operating System                               Notes
 Intel i386                FreeBSD 2.0.5
 IBM RS6000                AIX 3.2                                          [1]
 HP (various numbers)      HP-UX 9.01                                       [1]

Notes:

[1] On these systems, the ability to use separately compiled function
    packages is (currently) lacking.  A math function package written in
    Rexx (supplied) may be used instead of the compiled one.
[2] Using the system cc with optimisation on SunOS 4 seems to exhibit
    a bug in the compiler which makes Rexx crash while interpreting the
    "trace o" instruction (of which there is one in the rexxcps program).
    Either: do not use optimisation flags; or: compile, delete rexx.o
    and recompile with COMPILEFLAG=-O0 (that's capital-oh zero).
[3] Using the system cc with optimisation, a strange bug manifests itself
    in which compound symbols do not work correctly.  Either: change the
    optimisation flags to -O1; or: compile, delete util.o and recompile with
    COMPILEFLAG=-O1.
[4] With gcc 2.8.1 a conflict between a gcc header and a system header
    prevented the math function library from compiling.  This may be a
    misconfiguration.  It was solved by inserting the following lines
    between "#include<math.h>" and "#include<stdlib.h>" in rxmathfn.c:
    #define initstate initstate1
    #define setstate  setstate1
    #define srandom   srandom1

The AIX 3.2 port was by Ignacio Reguero <reguero@sunsoft.cern.ch> (for
gcc) and later modified by Yossie Silverman <yossie@ucsfvm.ucsf.edu>
(for cc).  The Make file entry for HP-UX was supplied by Mark Hessling
<M.Hessling@qut.edu.au>.  The Solaris port was with the help of Pierre Fortin
<pfortin@cisco.com>.  The FreeBSD port was done with the aid of an account
supplied by Scott Mann <smann@TheMall.Net>.