The file tet3.8A-src.tar.Z contains patch A for TETware 3.8.
The patch contains updated source files with the following change:

    * The tet_putenv() internal C library function now uses
      putenv() or setenv() if they are available in preference to
      modifying environ directly.  By default if the code is
      compiled with _XOPEN_SOURCE defined or if <unistd.h> defines
      _XOPEN_VERSION then putenv() will be used; if compiled with
      _POSIX_C_SOURCE >= 200112 or if <unistd.h> defines
      _POSIX_VERSION with a value >= 200112 then setenv() will be
      used; otherwise a compiler error will be produced asking
      for an explicit selection to be made.  This can be done by
      defining TET_USE_PUTENV, TET_USE_SETENV or TET_USE_ENVIRON
      using a -D compiler flag in the DTET_CDEFS variable in the
      src/defines.mk file.  Only if TET_USE_ENVIRON is defined will
      direct modification of environ be used.  (Also the direct
      modification method used is now "safer" than before.)

Note that patches are cumulative.  If you intend to install a later
patch, you do not need this one as well.

The file tet3.8A-src.tar.Z contains updated versions of the following
files:

    src/tet3/dtet2lib/putenv.c
    src/tet3/dtet2lib/shared.mk

To apply the patch, unpack tet3.8A-src.tar.Z in your $TET_ROOT directory.

If you wish to save the original versions of these files before applying
the patch, one way to do this is:

    zcat tet3.8A-src.tar | pax | pax -w > pre_patchA.tar

End of README