release 0.5.3 (20190121)
  - Fix markup typo in the man page.
  - Abort on line numbering or column numbering overflow. Line
    numbers are limited to values that fit in "unsigned int". Also
    reject input lines longer than 2^32-1 characters. It seems
    reasonable to presume that any input that violates these
    constraints is someone screwing around and not a serious attempt
    to compile or preprocess anything useful. Done in response to
    n2129, but without getting into any of the silliness found there.
  - Recognize __ia64__ for IA64 builds.
  - Recognize __aarch64__ for 64-bit ARM builds, as sent in by
    various people.
  - Recognize __riscv__ and __riscv64__ for risc-v builds.

release 0.5.2 (20160904)
  - Fix typo in -U usage message, noticed by Joerg.
  - Add a -debuglog option to send an execution trace to a file.
    Intended to be used when debugging imake templates and other
    complex input, not for debugging tradcpp itself.

release 0.5.1 (20150612)
  - Fix a stupid regression in 0.5 that causes it to not recognize a
    pile of options.
  - Fix output corruption caused by mishandling which macros are
    currently in use. In particular, "curmacro" is only valid while
    we're parsing a macro name and arguments, and can change once we
    start expanding, so don't use it to clear the in-use flag. This
    problem has been around all along but was only just exposed.
  - Also don't set curmacro to null after calling expand_domacro as
    that can cause us to think a macro name we just read is defined().
    This one was introduced in 0.5.
  - Don't use "remove" as a local variable as gcc 4.1 gets upset
    about it vs. remove(3) in stdio.h.

release 0.5 (20150612)
  - Don't report unclosed comments as "No newline at end of file".
  - Don't rely on <stdbool.h> existing, as (predictably) it doesn't
    work on Solaris.
  - Similarly, don't rely on C11 anonymous unions as the Solaris
    compiler vomits on them.
  - Typo fix in man page from Jason McIntyre; and change "Usage" to
    "usage" in usage for pedantic reasons, from Igor Sobrado.
  - Accept "-" as either input or output file name to mean stdin or
    stdout respectively. Suggested by Jonathan Gray.
  - Fix output spacing behavior to match gcc when newlines appear in or
    while looking for macro arguments. Partly from Joerg Sonnenberger.
  - Implement __FILE__ and __LINE__ macros. Mostly from Joerg Sonnenberger.
  - Implement #line. Partly from Joerg Sonnenberger.
  - Declare usage() with PF(). From wiz.

release 0.4 (20130713)
  - Fix stupid build problem introduced in 0.3.1.
  - Accept and ignore -m32, which imake issues willy-nilly on a bunch
    of platforms. I thought this had already been done, but apparently
    not.
  - Don't use the <err.h> functions. There are still people out there
    using legacy systems missing them.
  - Sort out some more issues pertaining to handling quoted strings.
  - Add some more tests.

release 0.3.1 (20130709)
  - Don't leak memory and assert if a bad command-line option comes
    after a -D or a -include foo.
  - Since imake is a principal application for tradcpp and imake carefully
    hides what it's doing when you run it, when rejecting an invalid option
    be sure to report *what* that option is.

release 0.3 (20130616)
  - Don't eval the control expression of the first #if of a block when
    already in a false block; it might not be valid. Reported by
    Baptiste Daroussin.
  - Don't recognize comments within character constants.
  - Don't recognize macro argument parentheses or commas within strings,
    or within character constants either.

release 0.2 (20130611)
  - auto-recognize more builtin PowerPC and mips macros
  - pass -Wunused (partly from Baptiste Daroussin)
  - allow absolute paths in include files (partly from Baptiste Daroussin)
  - don't use getprogname() in the name of portability
  - add tests arising from December 2010 tech-toolchain thread (one
    from der Mouse, one of mine)
  - clean out usage of sys/cdefs.h macros and don't use the implementation
    namespace
  - make -Wcomment work again
  - fix handling of relative includes
  - provide a man page
  - other minor improvements

release 0.1 (20130610)
  - first release, works with at least some imake templates