https://github.com/mchehab/zbar/commit/89e7900d85dd54ef351a7ed582aec6a5a5d7fa37
https://bugs.gentoo.org/775656

From 89e7900d85dd54ef351a7ed582aec6a5a5d7fa37 Mon Sep 17 00:00:00 2001
From: Boyuan Yang <byang@debian.org>
Date: Thu, 31 Dec 2020 12:56:26 -0500
Subject: [PATCH] configure.ac: Fix quote issue (autoconf 2.70 compat)

One of the AS_IF() macro was not properly quoted. This commit
fixes that issue.

This patch closes: #132 (fixes this bug report).
---
 configure.ac | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index df0220a8..db4bc902 100644
--- a/configure.ac
+++ b/configure.ac
@@ -656,7 +656,7 @@ AS_IF([test "x$with_qt" != "xno"],
 					    [with_qt="no"])])])
 
 AS_IF([test "x$with_qt" != "xno"],
-   AS_IF([test "x$with_qt5" != "xno"],
+   [AS_IF([test "x$with_qt5" != "xno"],
     [AC_CHECK_PROGS(MOC, [moc-qt5 moc])
      AC_MSG_NOTICE([using moc from $MOC])
      QT_VERSION=`$PKG_CONFIG Qt5Gui --modversion`
@@ -672,7 +672,7 @@ dnl -fPIC has no effect on Windows and breaks windres
      QT_VERSION=`$PKG_CONFIG QtGui --modversion`
      AC_MSG_NOTICE([using Qt version $QT_VERSION])
      qt_pkgconfig_file="zbar-qt.pc"
-     ]))
+     ])])
 
 AM_CONDITIONAL([HAVE_QT], [test "x$with_qt" = "xyes"])