Without this change, numerous tests would fail.
E.g., on a Fedora 16 system, running autoreconf would print this warning:
Use of uninitialized value $ARGV[0] in pattern match (m//) at \
/p/share/autoconf/Autom4te/General.pm line 273.
>From 75a5ef5c889bc7db3d560034338e99b2fc88f846 Mon Sep 17 00:00:00 2001
From: Jim Meyering <[email protected]>
Date: Sun, 15 Jan 2012 17:16:52 +0100
Subject: [PATCH] avoid new warning about undefined $ARGV[0]
* lib/Autom4te/General.pm (getopt): Avoid warning induced by
yesterday's change: $ARGV[0] may not be defined, e.g., when
invoked via autoreconf.
---
ChangeLog | 7 +++++++
lib/Autom4te/General.pm | 2 +-
2 files changed, 8 insertions(+), 1 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index c5ccc04..2ab830e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2012-01-15 Jim Meyering <[email protected]>
+
+ avoid new warning about undefined $ARGV[0]
+ * lib/Autom4te/General.pm (getopt): Avoid warning induced by
+ yesterday's change: $ARGV[0] may not be defined, e.g., when
+ invoked via autoreconf.
+
2011-01-14 Stefano Lattarini <[email protected]>
getopt: fix diagnostic for missing mandatory option argument
diff --git a/lib/Autom4te/General.pm b/lib/Autom4te/General.pm
index 5b48005..2379ce3 100644
--- a/lib/Autom4te/General.pm
+++ b/lib/Autom4te/General.pm
@@ -270,7 +270,7 @@ sub getopt (%)
# FIXME: Lot of code duplication with automake here. It would probably
# be best to generalize our getopt() func and rip it out in a new module
# from which automake can sync.
- if ($ARGV[0] =~ /^-./)
+ if (defined $ARGV[0] && $ARGV[0] =~ /^-./)
{
my %argopts;
for my $k (keys %option)
--
1.7.9.rc1.2.gccfe4
