274 prerelease

Hi all,

Commit a634be3b976d91cf18ac130a0fb145e6176a1e53 is available for testing, with a view toward releasing 274.

Draft release notes:

 
  Features

  - Configure/Build:
    - 'make clean-c" now cleans the C object files without removing .tlo files.
      - complementary to "make clean-tlo".
    - experimental, not tested support for configuring 64 bit time_t on
      32 bit Glibc.
    - CPPFLAGS (C preprocessor flags) variable noticed and used now.

  - FFI:
    - new feature: enumed bitfield type combination now works.

  - Doc:
    - numerous documentation fixes.

  - Lib:
    - cptr-int: allow full unsigned range, so pointers can be specified
      as unsigned integers, or using negative signed values also.
    - New copy-cptr function; copy copies cptr objects.
    - New nandf and norf functions.
    - New function random-sample for one-pass reservoir sampling of a sequence.

  - Getopts:
    - various improvements.
    - opt-help function/method split up into several.

  - Macros:
    - New etypecase macro.
    - New nand and nor macros and functions.

  - Compiler:
    - new optimizations.

  - TXR Pattern Language:
    - new function match-fboundp for testing whether a symbol has a binding
      as a pattern function.

  - Expander:
    - new @,expr hack: quasiquote generates (sys:var ...) or (sys:expr ...)
      based on type of substituted value.

  - Listener:
    - Hack: Ctrl-V Ctrl-J now inserts CR (i.e. new line in multiline mode) rather than a LF.
      - Good for people used to inserting line breaks in GNU Readline.

  Bugs

  - TXR Pattern Language:
    - bug fixed in @(freeform)
    - involves bugfix in lazy-str-get-trailing-list function.
    - filtering now throws when there is an invalid filter,
      due to a fix in the filter-string-tree function.

  - Parser:
    - bug: carriage returns in JSON not tolerated.

  - Configure/Build
    - fixed broken file offset bits detection, resulting in no large
      file support on 32 bit Glibc platforms (regression since 244).
    - fixed broken syntax in unwind.h causing build to break if
      CONFIG_DEBUG_SUPORT disabled.

  - Macros:
    - sum-each, mul-each: handle no vars case.
    - typecase: return nil from formless clauses.
    - fix broken :key parameters.

  - Lib:
    - carray: allow t and floating 0 in sub and replace.
    - carray-replace: two overrun bugs.

  - Listener:
    - bug handling comments in plain mode.
    - issue handling Ctrl-C in plain mode.

  - Structural Pattern Matching:
    - bug: quasiliteral match wrongly allowing loose prefix matching.

  - Command Line:
    - -Dvar now binds var to empty string rather than t.
      - this t was some thing inadvertently introduced in 2014.

  - Vim Syntax Files:
    - improvement in handling multi-line string literals.