71b7cc4222
* Noteworthy changes in release 2.68 (2010-09-22) [stable]
Released by Eric Blake, based on git versions 2.67.*.
** AC_MSG_ERROR (and AS_ERROR) can once again be followed immediately by
`dnl'. Regression introduced in 2.66.
** AC_INIT again allows URLs with '?' for its BUG-REPORT argument.
Regression introduced in 2.66.
** AC_REPLACE_FUNCS again allows a non-literal argument, such as a shell
variable that expands to a list of functions to check. Regression
introduced in 2.66.
** AT_BANNER() with empty argument will cause visual separation from previous
test category.
** The macros AC_PREPROC_IFELSE, AC_COMPILE_IFELSE, AC_LINK_IFELSE, and
AC_RUN_IFELSE now warn if the first argument failed to use
AC_LANG_SOURCE or AC_LANG_PROGRAM to generate the conftest file
contents. A new macro AC_LANG_DEFINES_PROVIDED exists if you have
a compelling reason why you cannot use AC_LANG_SOURCE but must
avoid the warning.
** The macro m4_define_default is now documented.
** Symlinked config.cache files are supported; configure now tries to
update non-symlinked cache files atomically, so that concurrent configure
runs do not leave behind broken cache files. It is still unspecified
which subset or union of results is cached though.
** Autotest testsuites should not contain long text lines any more, and be
portable even when very many test groups are used.
** AT_CHECK semantics with respect to the Autotest variable $at_status and
shell execution environment of the arguments are documented now.
** AC_FC_LIBRARY_LDFLAGS now tolerates output from newer gfortran.
** Newly obsolete macros
The following macros have been marked obsolete. New programs
should use the corresponding Gnulib modules. Gnulib not only
detects a larger set of portability problems with these functions,
but also provides complete workarounds.
AC_FUNC_ERROR_AT_LINE AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
AC_FUNC_MKTIME AC_FUNC_STRTOD
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