`0'. Test and fix.
Reported by Assar Westerlund.
* Makefile.am (maintainer-check): New target.
* tests/Makefile.am (maintainer-check, maintainer-check-posix)
(maintainer-check-c++, expr): Likewise.
* configure.in (EXPR): Look for it.
* tests/atgeneral.m4 (AT_CHECK): Propagate $2's default value.
* tests/compile.at (Extensions): New test.
* aclang.m4 (_AC_COMPILER_EXEEXT_DEFAULT, _AC_COMPILER_EXEEXT_O):
Distinguish files with or without a dot.
* autoreconf.sh: Likewise.
* autoheader.sh: Ditto.
* autoupdate.sh: Similarly.
* doc/autoconf.texi: Adjust.
* tests/atspecific.m4: Be sure to remove configure.in.
Adjust the test suite to use `configure.ac'.
configure.in maintainer, but discourage its use.
* acspecific.m4 (_AC_CYGWIN, _AC_MINGW32, _AC_EMXOS2): Rename as...
(AC_CYGWIN, AC_MINGW32, AC_EMXOS2): these.
AU defined on top of AC_CANONICAL_HOST and $host_os.
* tests/mktests.sh (update_exclude_list): Add AC_CYGWIN,
AC_MINGW32, and AC_EMXOS2.
* acspecific.m4 (AC_EXEEXT, AC_OBJEXT, _AC_EXEEXT, _AC_OBJEXT):
Move as...
* aclang.m4 (AC_EXEEXT, AC_OBJEXT, _AC_COMPILER_EXEEXT)
(_AC_COMPILER_OBJEXT): these.
(_AC_COMPILER_EXEEXT): Use _AC_LINK_IFELSE.
Don't depend upon $CYGWIN and the like.
(_AC_COMPILER_OBJEXT): Model after _AC_COMPILER_EXEEXT.
Skip more extensions.
Use _AC_COMPILE_IFELSE.
arrays is nondeterministic across AWK implementations.
* tests/tools.at (autoconf: forbidden tokens): Sort the error
message to guarantee its uniqueness.
around ${foo=bar}.
(Assignments): Rewrite as a summary of the previous section.
* acgeneral.m4 (AC_CACHE_SAVE): Be protected against the Solaris'
`${foo='${bar}'}' bug.
* doc/autoconf.texi (Limitations of Usual Tools) <expr>: More
information, thanks to Paul Berrevoets, Paul Eggert and David
Morgan.
* sh.m4 (_AS_EXPR_PREPARE): New.
(AS_DIRNAME): Use it.
From Paul Eggert and Johan Danielsson.
* doc/autoconf.texi (Limitations of Usual Tools) <sed>:
Reorganize. Document this issue.
* autoupdate.sh (dir): Use `,' as separator instead of `/'
* autoreconf.sh: Likewise.
* autoupdate.sh: Ditto.
whether fseeko and ftello are properly declared.
* acfunctions.m4 (AC_FUNC_FSEEKO): New macro, which worries about
fseeko (and presumably ftello). Do not set _XOPEN_SOURCE; that
causes too many problems in practice.
* acfunctions (fteelo, fseeko): Trigger AC_FUNC_FSEEKO.
* doc/autoconf.texi: Adjust.
(Shell Substitutions, Assignments): these.
Move them before `Special Shell Variables'.
(Shell Substitutions): Include information on `$()' from Russ
Allbery.
`acconfig.h', `config.h.top', and `config.h.bot'.
Reported by Aharon Robbins.
* doc/autoconf.texi (Making configure Scripts)
(Automatic Remaking, Defining Symbols, Distributing): Forget about
these files.
(acconfig.h): Reword.
Display the old scheme presenting the dependencies between input
and output files.
(Changed File Names): Clarify.
obsolete options to stderr. Adjust list of options. Correct
processing of options. Process options with values separated by
"=" first, so that abbreviations work. Don't accept "=" with
short options.
* autoheader.sh: Likewise.
* autoreconf.sh: Likewise.
* autoupdate.sh: Likewise.
* ifnames.sh: There is no "--verbose" option.
* doc/autoconf.texi: Option "-A" requires an argument.
(autoreconf Invocation): Document "--install", "--symlink",
"--m4dir" and the options passed to Automake.
