[SCM] GNU Autoconf source repository branch, master, updated. v2.67-71-gb99695d

[Eric Blake]

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- Log -----------------------------------------------------------------
commit b99695da259535240b5f86ae8f073efd30786869
Author: Bruno Haible <address@hidden>
Date:   Fri Sep 17 09:56:27 2010 -0600

    docs: mark several macros obsolete
    
    * doc/autoconf.texi (Particular Functions): Mark AC_FUNC_ERROR_AT_LINE,
    AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK, AC_FUNC_MKTIME, AC_FUNC_STRTOD
    as obsolete and refer to Gnulib.
    * NEWS: Mention the change.
    
    Signed-off-by: Eric Blake <address@hidden>

commit 12d158217c3f4c235ab5bedd188d3907f925f142
Author: Bruno Haible <address@hidden>
Date:   Fri Sep 17 09:50:34 2010 -0600

    AC_FUNC_STRNLEN: more realistic cross-compilation guess
    
    * lib/autoconf/functions.m4 (AC_FUNC_STRNLEN): Require
    AC_CANONICAL_HOST. When cross-compiling, guess it works everywhere
    except on AIX.
    
    Signed-off-by: Eric Blake <address@hidden>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                 |   13 +++++++++++++
 NEWS                      |    9 +++++++++
 doc/autoconf.texi         |   12 ++++++++++++
 lib/autoconf/functions.m4 |    7 ++++++-
 4 files changed, 40 insertions(+), 1 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 7710302..82185b4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2010-09-17  Bruno Haible  <address@hidden>
+
+       docs: mark several macros obsolete
+       * doc/autoconf.texi (Particular Functions): Mark AC_FUNC_ERROR_AT_LINE,
+       AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK, AC_FUNC_MKTIME, AC_FUNC_STRTOD
+       as obsolete and refer to Gnulib.
+       * NEWS: Mention the change.
+
+       AC_FUNC_STRNLEN: more realistic cross-compilation guess
+       * lib/autoconf/functions.m4 (AC_FUNC_STRNLEN): Require
+       AC_CANONICAL_HOST. When cross-compiling, guess it works everywhere
+       except on AIX.
+
 2010-09-16  Eric Blake  <address@hidden>
 
        m4sh: fix today's AS_BOX regression
diff --git a/NEWS b/NEWS
index f24b94c..65013c7 100644
--- a/NEWS
+++ b/NEWS
@@ -33,6 +33,15 @@ GNU Autoconf NEWS - User visible changes.
 
 ** 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
+
 
 * Major changes in Autoconf 2.67 (2010-07-21) [stable]
   Released by Eric Blake, based on git versions 2.66.*.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 8471525..6424302 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -4905,6 +4905,9 @@ If the @code{error_at_line} function is not found, 
require an
 
 The result of this macro is cached in the @code{ac_cv_lib_error_at_line}
 variable.
+
+The @code{AC_FUNC_ERROR_AT_LINE} macro is obsolescent.  New programs
+should use Gnulib's @code{error} module.  @xref{Gnulib}.
 @end defmac
 
 @defmac AC_FUNC_FNMATCH
@@ -5146,6 +5149,9 @@ If @code{lstat} behaves properly, define
 
 The result of this macro is cached in the
 @code{ac_cv_func_lstat_dereferences_slashed_symlink} variable.
+
+The @code{AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK} macro is obsolescent.
+New programs should use Gnulib's @code{lstat} module.  @xref{Gnulib}.
 @end defmac
 
 @defmac AC_FUNC_MALLOC
@@ -5235,6 +5241,9 @@ Posix standard and should be the inverse of
 
 The result of this macro is cached in the
 @code{ac_cv_func_working_mktime} variable.
+
+The @code{AC_FUNC_MKTIME} macro is obsolescent.  New programs should
+use Gnulib's @code{mktime} module.  @xref{Gnulib}.
 @end defmac
 
 @anchor{AC_FUNC_MMAP}
@@ -5414,6 +5423,9 @@ variable @code{POW_LIB} to the extra library needed.
 
 This macro caches its result in the @code{ac_cv_func_strtod} variable
 and depends upon the result in the @code{ac_cv_func_pow} variable.
+
+The @code{AC_FUNC_STRTOD} macro is obsolescent.  New programs should
+use Gnulib's @code{strtod} module.  @xref{Gnulib}.
 @end defmac
 
 @defmac AC_FUNC_STRTOLD
diff --git a/lib/autoconf/functions.m4 b/lib/autoconf/functions.m4
index 235def3..f03991b 100644
--- a/lib/autoconf/functions.m4
+++ b/lib/autoconf/functions.m4
@@ -1673,6 +1673,7 @@ LIBS="-lintl $LIBS"])])dnl
 AN_FUNCTION([strnlen], [AC_FUNC_STRNLEN])
 AC_DEFUN([AC_FUNC_STRNLEN],
 [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])dnl
+AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
 AC_CACHE_CHECK([for working strnlen], ac_cv_func_strnlen_working,
 [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT], [[
 #define S "foobar"
@@ -1692,7 +1693,11 @@ AC_CACHE_CHECK([for working strnlen], 
ac_cv_func_strnlen_working,
 ]])],
               [ac_cv_func_strnlen_working=yes],
               [ac_cv_func_strnlen_working=no],
-              [ac_cv_func_strnlen_working=no])])
+              [# Guess no on AIX systems, yes otherwise.
+               case "$host_os" in
+                 aix*) ac_cv_func_strnlen_working=no;;
+                 *)    ac_cv_func_strnlen_working=yes;;
+               esac])])
 test $ac_cv_func_strnlen_working = no && AC_LIBOBJ([strnlen])
 ])# AC_FUNC_STRNLEN
 


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