NAME

       xc - portable IRAF compile/link utility

SYNOPSIS

       xc [flags] files...

DESCRIPTION

       XC is a machine independent utility for compiling and linking IRAF tasks or files.  The XC
       utility may also be used to compile and/or link non-IRAF files and tasks. It can  be  used
       to generate fortran from xpp or ratfor code, to compile any number of files, and then link
       them if desired.  XC accepts and maps IRAF virtual filenames, but since it is a standalone
       bootstrap utility the environment is not passed, hence logical directories cannot be used.

       It is suggested that everyone stick with the iraf virtual file name extensions.  These are
       : .x, .r, .f, .c, .s, .o, .a, .e. The meaning of these is:

            .x   SPP code
            .r   Ratfor code
            .f   Fortran code
            .c   C code
            .s   Macro assembler code
            .o   Object module
            .a   Library file
            .e   Executable Image

       XC is available both in the CL and as a standalone task.  Usage is  equivalent  in  either
       case.

FLAGS

       -c     Tells xc not to link, i.e., not to create an executable.

       -d     Causes debug messages to be printed during execution.

       -F, -f Do not delete the Fortran translation of an SPP source file.

       -h     Causes  the  executable to be linked as a host program, i.e., without the IRAF main
              and without searching the IRAF  libraries,  unless  explicitly  referenced  on  the
              command  line.  Used to compile and link host (e.g., Fortran) programs which may or
              may not reference the IRAF libraries.

       -H     Link a host program as with "-h", but include the VOS libraries.

       -A     Force architecture specific include files.

       -C     Link a host program which has a C main.  We may need to tweak the command line as a
              special case here since we normally assume Fortran sources.

       -/flag, -//foo
              Pass flag to host compiler without further interpretation. "-/flag" becomes "-foo",
              "-//foo" becomes "foo".

       -Ddefine
              Pass a -Ddefine flag on to the host compiler.

       -Idir  Pass a -Idir flag on to the host compiler.  A  special  case  is  "-Inolibc"  which
              disables automatic inclusion of the IRAF LIBC includes (hlib$libc).

       -llib, -Ldir
              This  tells  the  linker  which  library  files  or library directories besides the
              standard ones to include.  These must be either on the current directory, or in  an
              IRAF system library (lib$ or hlib$).  The library specification must be immediately
              after the option as in "-lxtools".  No other option may follow the  'l'  option  in
              the same argument as in -lxtoolsO.

       -N     Generates the output temp file in /tmp during the link, then moves it to the output
              directory in one operation when done.  For cases such as linking in an  NFS-mounted
              directory, where all the NFS i/o may slow the link down excessively.

       -Nh [filename]
              This tells xpp that the foreign definitions in the file specified should be used in
              preference to standard include files.

       -o     This flag redirects the output of the compile if used in conjunction with -c option
              or  specifies  where  the  executable  or object is to be placed.  If not given the
              first file name is used to obtain the name for the executable or object.

       -O     Optimize object code produced; this is now the default, but this  switch  is  still
              provided for backwards compatibility.

       -p pkgname
              Load  the  package environment for the named external package, e.g., "xc -c -p noao
              file.x".  If the same package is  always  specified  the  environment  variable  or
              logical  name PKGENV may be defined at the host level to accomplish the same thing.
              The package name must be specified when doing software development in  an  external
              or layered package.

       -q     Disable optimization.  Opposite of -O.  Object code will be optimized by default.

       -w     Suppress warnings. Forwarded to the compiler and linker.

       -x     Compile and link for debugging.

       -z, -e, -t, -T, -s
              Ignored. Provided for backward compatibility.

       -V     Print XC version identification.

SEE ALSO

       mkpkg(1), generic(1).

AUTHOR

       This manual page was taken from the xc.hlp file in the IRAF sources.