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Re: AC_FUNC_STRTOD


From: Bruno Haible
Subject: Re: AC_FUNC_STRTOD
Date: Sat, 28 Aug 2010 11:56:37 +0200
User-agent: KMail/1.9.9

Hi,

Regarding the deprecation of AC_FUNC_* macros that are better provided by
gnulib:

Paolo Bonzini wrote in 
<http://lists.gnu.org/archive/html/bug-autoconf/2010-06/msg00041.html>:
> > The affected macros are:
> >    - AC_FUNC_ERROR_AT_LINE
> 
> If you're interested in this, you're likely using gnulib anyway nowadays.
> 
>  >    - AC_FUNC_STRTOD
>  >    - AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
>  >    - AC_FUNC_MKTIME
>  >    - AC_FUNC_STAT, AC_FUNC_LSTAT
>  >    - AC_FUNC_GETLOADAVG
>  >    - AC_REPLACE_FNMATCH
> 
> I don't think anyone knows even how to use these, i.e. where to get the 
> replacement (I think it was meant to be taken from libit...).  At this 
> point using gnulib is better.
> 
>  >    - AC_FUNC_MEMCMP
> 
> This one should have been made obsolescent already, shouldn't it? 
> (Given the gnulib module is).
> 
>  >    - AC_FUNC_STRNLEN
> 
> This maybe falls in the same group as AC_FUNC_MALLOC/AC_FUNC_REALLOC.
> 
> >    - AC_FUNC_OBSTACK
> 
> This one I would leave in too, obstacks are pretty self contained and I 
> think it is the most likely used in the wild.

OK, so the list of macros that should be marked obsolete is:

  - AC_FUNC_ERROR_AT_LINE
  - AC_FUNC_GETLOADAVG                       (already marked obsolescent)
  - AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
  - AC_FUNC_MEMCMP                           (already marked obsolescent)
  - AC_FUNC_MKTIME
  - AC_FUNC_STAT, AC_FUNC_LSTAT              (already marked obsolescent)
  - AC_FUNC_STRTOD
  - AC_REPLACE_FNMATCH                       (already marked obsolescent)

Removing those that are already marked obsolescent, the following remain:

  - AC_FUNC_ERROR_AT_LINE
  - AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
  - AC_FUNC_MKTIME
  - AC_FUNC_STRTOD

Here is a proposed patch.


2010-08-28  Bruno Haible  <address@hidden>

        * 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.

--- NEWS.orig   Sat Aug 28 11:46:36 2010
+++ NEWS        Sat Aug 28 11:42:54 2010
@@ -25,6 +25,14 @@
 ** Autotest testsuites should not contain long text lines any more, and be
    portable even when very many test groups are used.
 
+** Newly obsolete macros
+   The following macros have been marked obsolete.  New programs should use
+   the corresponding Gnulib modules.  Gnulib not only detects the particular
+   portability problems 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.*.
--- doc/autoconf.texi.orig      Sat Aug 28 11:46:36 2010
+++ doc/autoconf.texi   Sat Aug 28 11:34:51 2010
@@ -4876,6 +4876,9 @@
 
 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
@@ -5117,6 +5120,9 @@
 
 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
@@ -5206,6 +5212,9 @@
 
 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}
@@ -5385,6 +5394,9 @@
 
 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



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