don't error but warn for osx_deployment_target value on osx

diff --git a/configure.ac b/configure.ac
index 9ecd965ac04dce500eb5b571f5f1764d96f07d41..5935a21330a33afd28f3dadad0b87f4a70dedd20 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -306,7 +306,7 @@ AC_CHECK_UNUSED_ATTRIBUTE
 # check OSX deployment target which is needed
 if echo $build_os | grep darwin > /dev/null; then
        if test x$MACOSX_DEPLOYMENT_TARGET != x10.4; then
-               AC_MSG_ERROR([Please export MACOSX_DEPLOYMENT_TARGET=10.4 in your environment to compile on Mac OS/X])
+               AC_MSG_WARN([Please export MACOSX_DEPLOYMENT_TARGET=10.4 in your environment to compile on Mac OS/X])
        fi
 fi