--- qsampler/trunk/configure.ac	2010/05/17 08:36:20	2092
+++ qsampler/trunk/configure.ac	2010/08/23 13:08:28	2116
@@ -1,5 +1,5 @@
 # Process this file with autoconf to produce a configure script.
-AC_INIT(Qsampler, 0.2.2.22, rncbc@rncbc.org, qsampler)
+AC_INIT(Qsampler, 0.2.2.27, rncbc@rncbc.org, qsampler)
 
 AC_CONFIG_SRCDIR(src/qsampler.cpp)
 AC_CONFIG_HEADERS(src/config.h)
@@ -111,14 +111,14 @@
 done
 
 # Check for proper Qt version.
-AC_CACHE_CHECK([for Qt library version >= 4.1],
+AC_CACHE_CHECK([for Qt library version >= 4.2],
   ac_cv_qtversion, [
   AC_TRY_LINK([#include "Qt/qglobal.h"], [
-#if QT_VERSION < 0x040100
-#error Qt library 4.1 or greater required.
+#if QT_VERSION < 0x040200
+#error Qt library 4.2 or greater required.
 #endif
     ], ac_cv_qtversion="yes", [
-      echo "no; Qt 4.1 or greater is required"
+      echo "no; Qt 4.2 or greater is required"
       exit
     ])
 ])
@@ -334,6 +334,9 @@
    AC_DEFINE(CONFIG_STACKTRACE, 1, [Define if debugger stack-trace is enabled.])
 fi
 
+# Some recent distros (eg. fedora, debian) require this.
+ac_libs="$ac_libs -lX11"
+
 AC_SUBST(ac_libs)
 AC_SUBST(ac_incpath)