[SCM] GNU Autoconf source repository branch, master, updated. v2.66-17-g70201af

[Eric Blake]

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- Log -----------------------------------------------------------------
commit 70201af851c0640cda80ec1c522e00a23906f9bf
Author: Ralf Wildenhues <address@hidden>
Date:   Tue Jul 20 07:35:01 2010 +0200

    Let autoreconf pass warning flags to new-enough aclocal.
    
    * bin/autoreconf.in ($aclocal_supports_warnings)
    ($automake_supports_warnings): New globals.
    (parse_args): Set and use them.  Be sure to invoke `aclocal
    --help' and `automake --help' just once each.
    * NEWS: Update.
    Prompted by report from Bruno Haible.
    
    Signed-off-by: Ralf Wildenhues <address@hidden>
    Signed-off-by: Eric Blake <address@hidden>

commit f3c508423fb6c5ef8bc45c613b05dedf76a1f24e
Author: Ralf Wildenhues <address@hidden>
Date:   Tue Jul 20 07:58:14 2010 +0200

    Fix parsing of empty variable settings on the command line.
    
    * lib/autoconf/general.m4 (_AC_INIT_PARSE_ARGS): Work around
    expr bug returning 0 instead of the empty string.
    * lib/autotest/general.m4 (AT_INIT): Likewise.
    
    Signed-off-by: Ralf Wildenhues <address@hidden>

commit e4d629f5b5c19b71c3d0cebe284c5343742e41e5
Author: Ralf Wildenhues <address@hidden>
Date:   Tue Jul 20 05:36:38 2010 +0200

    Fix typo in the manual.
    
    * doc/autoconf.texi (AC_ACT_IFELSE vs AC_TRY_ACT): Fix typo.
    
    Signed-off-by: Ralf Wildenhues <address@hidden>

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

Summary of changes:
 ChangeLog               |   18 ++++++++++++++++++
 NEWS                    |    2 ++
 bin/autoreconf.in       |   16 +++++++++++++---
 doc/autoconf.texi       |    2 +-
 lib/autoconf/general.m4 |    5 +++--
 lib/autotest/general.m4 |    4 ++--
 6 files changed, 39 insertions(+), 8 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index a9ee195..1228e9b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,21 @@
+2010-07-20  Ralf Wildenhues  <address@hidden>
+
+       Let autoreconf pass warning flags to new-enough aclocal.
+       * bin/autoreconf.in ($aclocal_supports_warnings)
+       ($automake_supports_warnings): New globals.
+       (parse_args): Set and use them.  Be sure to invoke `aclocal
+       --help' and `automake --help' just once each.
+       * NEWS: Update.
+       Prompted by report from Bruno Haible.
+
+       Fix parsing of empty variable settings on the command line.
+       * lib/autoconf/general.m4 (_AC_INIT_PARSE_ARGS): Work around
+       expr bug returning 0 instead of the empty string.
+       * lib/autotest/general.m4 (AT_INIT): Likewise.
+
+       Fix typo in the manual.
+       * doc/autoconf.texi (AC_ACT_IFELSE vs AC_TRY_ACT): Fix typo.
+
 2010-07-19  Eric Blake  <address@hidden>
 
        Fix up AC_INIT vs. " issues, and document it.
diff --git a/NEWS b/NEWS
index a8683c6..a1ce558 100644
--- a/NEWS
+++ b/NEWS
@@ -20,6 +20,8 @@ GNU Autoconf NEWS - User visible changes.
    in other contexts, e.g., for Automake, and may be subject to
    further restrictions in the future.  Regression introduced in 2.66.
 
+** autoreconf passes warning flags to new enough versions of aclocal.
+
 
 * Major changes in Autoconf 2.66 (2010-07-02) [stable]
   Released by Eric Blake, based on git versions 2.65.*.
diff --git a/bin/autoreconf.in b/bin/autoreconf.in
index 0fc3bb8..e22f7b6 100644
--- a/bin/autoreconf.in
+++ b/bin/autoreconf.in
@@ -122,8 +122,12 @@ my $install = 0;
 my $symlink = 0;
 # Does aclocal support --force?
 my $aclocal_supports_force = 0;
+# Does aclocal support -Wfoo?
+my $aclocal_supports_warnings = 0;
 # Does automake support --force-missing?
 my $automake_supports_force_missing = 0;
+# Does automake support -Wfoo?
+my $automake_supports_warnings = 0;
 
 my @prepend_include;
 my @include;
@@ -182,8 +186,12 @@ sub parse_args ()
        }
     }
 
-  $aclocal_supports_force = `$aclocal --help 2>/dev/null` =~ /--force/;
-  $automake_supports_force_missing = `$automake --help 2>/dev/null` =~ 
/--force-missing/;
+  my $aclocal_help = `$aclocal --help 2>/dev/null`;
+  my $automake_help = `$automake --help 2>/dev/null`;
+  $aclocal_supports_force = $aclocal_help =~ /--force/;
+  $aclocal_supports_warnings = $aclocal_help =~ /--warnings/;
+  $automake_supports_force_missing = $automake_help =~ /--force-missing/;
+  $automake_supports_warnings = $automake_help =~ /--warnings/;
 
   # Dispatch autoreconf's option to the tools.
   # --include;
@@ -242,7 +250,9 @@ sub parse_args ()
       $autoconf   .= $warn;
       $autoheader .= $warn;
       $automake   .= $warn
-       if `$automake --help` =~ /--warnings/;
+       if $automake_supports_warnings;
+      $aclocal    .= $warn
+        if $aclocal_supports_warnings;
     }
 }
 
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 8d0f7d3..cba4b1b 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -23291,7 +23291,7 @@ The @code{LIBOBJDIR} feature is experimental.
 @address@hidden
 Since Autoconf 2.50, internal codes uses @code{AC_PREPROC_IFELSE},
 @code{AC_COMPILE_IFELSE}, @code{AC_LINK_IFELSE}, and
address@hidden on one hand and @code{AC_LANG_SOURCES},
address@hidden on one hand and @code{AC_LANG_SOURCE},
 and @code{AC_LANG_PROGRAM} on the other hand instead of the deprecated
 @code{AC_TRY_CPP}, @code{AC_TRY_COMPILE}, @code{AC_TRY_LINK}, and
 @code{AC_TRY_RUN}.  The motivations where:
diff --git a/lib/autoconf/general.m4 b/lib/autoconf/general.m4
index 477c4ab..bb18845 100644
--- a/lib/autoconf/general.m4
+++ b/lib/autoconf/general.m4
@@ -613,8 +613,9 @@ do
   fi
 
   case $ac_option in
-  *=*) ac_optarg=`expr "X$ac_option" : '[[^=]]*=\(.*\)'` ;;
-  *)   ac_optarg=yes ;;
+  *=?*) ac_optarg=`expr "X$ac_option" : '[[^=]]*=\(.*\)'` ;;
+  *=)   ac_optarg= ;;
+  *)    ac_optarg=yes ;;
   esac
 
   # Accept the important Cygnus configure options, so we can diagnose typos.
diff --git a/lib/autotest/general.m4 b/lib/autotest/general.m4
index 2b46705..e27d601 100644
--- a/lib/autotest/general.m4
+++ b/lib/autotest/general.m4
@@ -474,8 +474,8 @@ do
   fi
 
   case $at_option in
-  *=*) at_optarg=`expr "x$at_option" : 'x[[^=]]*=\(.*\)'` ;;
-  *)   at_optarg= ;;
+  *=?*) at_optarg=`expr "X$at_option" : '[[^=]]*=\(.*\)'` ;;
+  *)    at_optarg= ;;
   esac
 
   # Accept the important Cygnus configure options, so we can diagnose typos.


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