src/contrib/asdf/asdf.lisp::
 * Update

 src/general-info/release-20e.txt::
 * Update

 code/float-trap.lisp::
  * In the default case, check FOP to see if it's defined.  This means
    it's a divide exception.

 code/x86-vm.lisp::
  * Also check to see if the offending instruction is a DIV or IDIV,
    which means we got an integer overflow.  Return the appropriate
    values in this case.

Apply the expt transform in more places.  The test script in the
ticket now passes.

The reader conditionals in {{{NOT-MORE-CONTAGIOUS}}} were incorrrectly
handling the case when the second type was a double-float. It was
always returning T in that case, but this is wrong if the first type
is a double-double-float.

This allows logical pathnames (which always have a host to parse
against) and search-lists (which don't have an explicit pathname to
parse against) to be parsed correctly.  See the comment for some
possible issues.

o Change default target to generate pdf file
o Update rerun loop with a better pattern that is less likely to cause
  an infinite loop.

o Change default from ps to pdf output.
o Fix pattern for rerunning latex to prevent infinite loop due to
  extraneous occurrences of "Rerun".  (From Carl.)
o Reorder rules for generating pdf so that we generate the indices and
  such before starting the loop.  Otherwise, we're in an infinite loop
  because the indices haven't been generated.

cmu-user.tex:
o Include ifpdf package

design.tex:
o Include ifpdf package
o Remove the home-grown ifpdf macro.

macros.tex:
o Remove the home-grown ifpdf macro.

introduction.tex:
unicode.tex:
o Use \url instead of \href for URLs.

Change *unidata-path* to be a pathname object instead of a namestring.

cmu-user/Makefile.

  better way.)
o Don't infloop when creating cmu-user.pdf by skipping over the
  version message from rerunfilecheck before checking for Rerun
  messages.

The text is there, but the chapter heading was missing.

describe-external-formats in the documentation.

places.

bootfiles/20d/boot-2012-12-1.lisp::
  Add :alien-callback to *features*

bin/build.sh::
  Change bootstrap directory to 20d.

code/lispinit.lisp::
  * Register :alien-callback feature if enabled.
  * Heap overflow checking depends on gencgc, so register that only if
    both are enabled.

tools/comcom.lisp::
  Compile c-callback only if :alien-callback is a feature.

tools/worldcom.lisp:
  Compile alien-callback onlf if :alien-callback is a feature.

prints.

compiler/ppc/c-callback.lisp::
compiler/sparc/c-callback.lisp::
compiler/x86/c-callback.lisp::
 New file containing the callback code from c-call.lisp.

compiler/ppc/c-call.lisp::
compiler/sparc/c-call.lisp::
compiler/x86/c-call.lisp::
 Removed the callback code.

code/alien-callback.lisp::
 New file containing the alien callback code.

code/alieneval.lisp::
 Removed the alien callback code.

tools/comcom.lisp::
 Compile c-callback.lisp

tools/worldcom.lisp:
 Compile alien-callback.lisp.

code/bit-bash.lisp::
 Add {{{BYTE-BASH-COPY}}} for copying bytes

code/exports.lisp::
 Add {{{BYTE-BASH-COPY}}}

compiler/generic/vm-fndb.lisp::
 Add {{{BYTE-BASH-COPY}}}

compiler/generic/vm-tran.lisp::
 Call {{{BYTE-BASH-COPY}}} in the deftransform for {{{REPLACE}}}.

Check that the start and end indices make sense for the given
strings.  This is important before we start bashing random parts of
the string, potentially overwriting other objects.