[SCM] GNU Autoconf source repository annotated tag, v2.68, created. v2.68

[Eric Blake]

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http://git.sv.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=aff44cbae33543ae78bb6246e7840dd9efef4f5c

The annotated tag, v2.68 has been created
        at  aff44cbae33543ae78bb6246e7840dd9efef4f5c (tag)
   tagging  92c45ea024f91358747f6001b5f89e2014ce5567 (commit)
  replaces  v2.67
 tagged by  Eric Blake
        on  Wed Sep 22 16:34:49 2010 -0600

- Log -----------------------------------------------------------------
2.68
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Bruno Haible (3):
      AC_FUNC_ALLOCA: modernize
      AC_FUNC_STRNLEN: more realistic cross-compilation guess
      docs: mark several macros obsolete

Eric Blake (48):
      post-release administrivia
      docs: mention cd limitation
      docs: mention ksh file descriptor limitation
      docs: track recent copyright assignment
      docs: mention ksh bug with function syntax
      docs: mention bash bug with word splitting
      AC_INIT: allow bugreport to contain '?'
      doc: improve AS_VAR_IF details
      AC_HEADER_STDBOOL: avoid spurious clang failure
      AC_FUNC_GETLOADAVG: don't define SVR4 on cygwin
      m4sh: fix some namespace safety issues
      docs: mention cost of globbing during variable expansion
      tests: improve some shell assumption testing
      m4sh: reduce size of AS_VAR_TEST_SET
      m4sh: revert regression in AS_TMPDIR
      m4sh: revert incorrect mix of "${a='b'}"
      docs: mention another issue with variable expansion
      autoconf: fix regression in AC_FUNC_SELECT_ARGTYPES
      autoconf: warn if AC_*_IFELSE lacks complete program
      docs: document m4_define_default
      m4sh: assume ${a:-b} support
      m4sh: protect LINENO against stray macro
      docs: avoid use of $tmp outside of config.status use
      config.status: minimize use of $tmp
      fortran: always avoid AC_LANG_CONFTEST warning
      docs: mention Solaris here-docs vs. ${a-"b c"}
      tests: avoid trashing /
      docs: enhance recommendations on test usage
      docs: mention bash vs. POSIXLY_CORRECT
      docs: mention traditional awk limitation
      docs: link to GNU Coding Standards in intro
      docs: update alloca recommendations
      m4sh: preserve set -vx over re-exec
      tests: skip broken automake wrapper on MirBSD
      docs: mention gnulib portability docs
      autotest: work around zsh bug
      m4sugar: fix regression in AC_MSG_ERROR expansion
      fortran: avoid misparsed FCLIBS from Fortran compiler
      m4sh: fix today's AS_BOX regression
      config.status: avoid corrupting $ac_t
      build: support autobuild
      autom4te: don't filter out portions of location traces
      tests: XFAIL in the face of a MacOS X bug
      maint: resync upstream files
      AC_REPLACE_FUNCS: restore shell loop for non-literal
      AC_LIBOBJ: optimize internal use
      AC_REPLACE_FUNCS: allow split lines again
      Release Version 2.68.

Fernando Carrijo (1):
      docs: fix minor typo and 'See See foo' instances

Paul Eggert (2):
      AC_HEADER_STDBOOL: avoid spurious failure with modern xlc
      AC_PROG_YACC: fix comment re what "yacc" stands for

Peter Rosin (1):
      autotest: keep testsuite files on unexpected pass

Ralf Wildenhues (24):
      Add missing index entries to manual.
      Fix typos in perlpod docs.
      Ensure unnamed test group categories are separated from previous.
      Add testsuite exposure for last-minute fix in 2.67.
      Fix typo in Autotest color test, for dash testsuite failure.
      Fix AC_LANG_SOURCE and AC_LANG_PROGRAM tests.
      Fix testsuite failure due to bugs in third-party aclocal macros.
      Fix description of AC_CONFIG_TESTDIR to not mention atconfig.in.
      Fix testsuite failures with typical m4-x.y.z program suffix.
      Skip AC_FC_SRCEXT([f90]) tests with a Fortran 77 compiler in $FC.
      Fix Autotest --errexit to exit after XPASSing tests.
      doc: AIX sed dislikes indented comments.
      tests: fix AC_CACHE_CHECK to skip with bad shells.
      Try to update config.cache atomically; respect symlinks.
      Avoid long lines in testsuite script.
      doc: minor indexing update.
      doc: index entries for non-environment, non-output variables.
      autotest: document and test at_status semantics.
      Document and test AT_CHECK args shell execution environment.
      doc: minor updates.
      docs: document zsh special array $options.
      docs: document zsh specialty with empty here-documents.
      Add autom4te trace for AM_PROG_AR.
      autom4te: add traces for likely future Automake macros

Stefano Lattarini (2):
      autoreconf: mention the AUTOM4TE environment variable
      tests: simplify grepping of 'automake --version'.

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