* Major changes in Autoconf 2.67 (2010-07-21) [stable]
Released by Eric Blake, based on git versions 2.66.*.
** AC_CONFIG_SUBDIRS with more than one subdirectory at a time works again.
Regression introduced in 2.66.
** AC_CHECK_SIZEOF of a pointer type works again. Regression introduced in
2.66.
** New macro AC_FC_LINE_LENGTH to accept long Fortran source code lines.
** AC_PREPROC_IFELSE now keeps the preprocessed output in the conftest.i
file for inspection by the commands in the ACTION-IF-TRUE argument.
** AC_INIT again allows parentheses and other characters that are literal
in single- or double-quoted strings, and in quoted and unquoted
here-documents, for its PACKAGE and VERSION arguments. Regression
introduced in 2.66.
** autoreconf passes warning flags to new enough versions of aclocal.
** Running an Autotest testsuite in parallel mode no longer triggers a
race condition that could cause the testsuite run to end early,
fixing a sporadic failure in autoconf's own testsuite. Bug present
since introduction of parallel tests in 2.63b.
* Major changes in Autoconf 2.66 (2010-07-02) [stable]
Released by Eric Blake, based on git versions 2.65.*.
** AC_FUNC_MMAP works in C++ mode again. Regression introduced in 2.65.
** Use of m4_divert without a named diversion now issues a syntax warning,
since it is seldom right to change diversions behind autoconf's back.
** The macros AC_TYPE_INT8_T, AC_TYPE_INT16_T, AC_TYPE_INT32_T, and
AC_TYPE_INT64_T work again. Regression introduced in 2.65.
** AC_PROG_INSTALL correctly uses `shtool' again. Regression introduced
in 2.64.
** Autoconf should work on EBCDIC hosts.
** AC_CHECK_DECL and AC_CHECK_DECLS accept optional function argument types
for overloaded C++ functions.
** AS_SET_CATFILE accepts nonliterals in its variable name argument now.
** Autotest testsuites accept an option --recheck to rerun tests that
failed or passed unexpectedly during the last non-debug testsuite run.
** AC_ARG_ENABLE and AC_ARG_WITH now also accept `+' signs in `--enable-*'
and `--with-*' arguments, converting them to underscores for the variable
names.
** In configure scripts, loading CONFIG_SITE no longer searches PATH,
and problems in loading the configuration site files are diagnosed.
** Autotest testsuites may optionally provide colored test results.
** The previously undocumented Autotest macros AT_ARG_OPTION and
AT_ARG_OPTION_ARG have seen bug fixes and are documented now.
AT_ARG_OPTION has been changed in that the negative of a long option
--OPTION is now --no-OPTION rather than --noOPTION.
** The macro AS_LITERAL_IF is slightly more conservative; text
containing shell quotes are no longer treated as literals.
Furthermore, a new macro, AS_LITERAL_WORD_IF, adds an additional
level of checking that no whitespace occurs in literals.
** The macros AS_TR_SH and AS_TR_CPP no longer expand their results.
** The following macros are now documented:
AS_BOX
** New macro AC_FC_FIXEDFORM to accept fixed-form Fortran.
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