[SCM] GNU Autoconf source repository branch, master, updated. v2.63-197-g291d709

[Ralf Wildenhues]

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- Log -----------------------------------------------------------------
commit 291d709efde90f2a548233dc2d64296bc158f43d
Author: Ralf Wildenhues <address@hidden>
Date:   Sun Nov 16 22:18:07 2008 +0100

    Fix exit status of expr version of as_func_arith.
    
    * lib/m4sugar/m4sh.m4 (_AS_VAR_ARITH_PREPARE): Count an exit
    status of 1 of expr also as success, to avoid failure if the
    computation result is zero.  Fixes test failures with IRIX sh,
    where the expr variant of as_func_arith is used.
    
    Signed-off-by: Ralf Wildenhues <address@hidden>

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

Summary of changes:
 ChangeLog           |    6 ++++++
 lib/m4sugar/m4sh.m4 |    1 +
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index ec89991..7a8502d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2008-11-16  Ralf Wildenhues  <address@hidden>
 
+       Fix exit status of expr version of as_func_arith.
+       * lib/m4sugar/m4sh.m4 (_AS_VAR_ARITH_PREPARE): Count an exit
+       status of 1 of expr also as success, to avoid failure if the
+       computation result is zero.  Fixes test failures with IRIX sh,
+       where the expr variant of as_func_arith is used.
+
        Do not use read-only variable $status.
        * tests/compile.at (AC_RUN_IFELSE): Use $estatus instead of
        $status, for zsh.
diff --git a/lib/m4sugar/m4sh.m4 b/lib/m4sugar/m4sh.m4
index f106e2d..56697ad 100644
--- a/lib/m4sugar/m4sh.m4
+++ b/lib/m4sugar/m4sh.m4
@@ -1743,6 +1743,7 @@ 
AS_IF([_AS_RUN(["AS_ESCAPE(m4_quote(_AS_VAR_ARITH_WORKS))"])],
 [as_func_arith ()
   {
     as_val=`expr "$[]@"`
+    case $? in 0|1) :;; *) false;; esac
   }]) # as_func_arith
 ])
 


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