From: Paul Eggert <eggert@cs.ucla.edu>
Date: Wed, 31 Oct 2001 20:07:48 +0000 (+0000)
Subject: (_AS_LINENO_WORKS): Do not surround body with {}, as that triggers a
X-Git-Tag: AUTOCONF-2.52f~12
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0dfeb49d8eafbc26c07f369b6de5400f5293bc56;p=thirdparty%2Fautoconf.git

(_AS_LINENO_WORKS): Do not surround body with {}, as that triggers a
bug in Bash 2.05.
---

diff --git a/lib/m4sugar/m4sh.m4 b/lib/m4sugar/m4sh.m4
index e18bf5b57..f7764073e 100644
--- a/lib/m4sugar/m4sh.m4
+++ b/lib/m4sugar/m4sh.m4
@@ -462,14 +462,18 @@ fi
 # _AS_LINENO_WORKS
 # ---------------
 # Succeed if the currently executing shell supports LINENO.
+# This macro does not expand to a single shell command, so be careful
+# when using it.  Surrounding the body of this macro with {} would
+# cause "bash -c '_ASLINENO_WORKS'" to fail (with Bash 2.05, anyway),
+# but that bug is irrelevant to our use of LINENO.
 m4_define([_AS_LINENO_WORKS],
-[{
+[
   as_lineno_1=$LINENO
   as_lineno_2=$LINENO
   as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
   test "x$as_lineno_1" != "x$as_lineno_2" &&
-  test "x$as_lineno_3"  = "x$as_lineno_2"
-}])
+  test "x$as_lineno_3"  = "x$as_lineno_2" dnl
+])
 
 # _AS_LINENO_PREPARE
 # ------------------