configure.ac: Clearly mark required and optional libs.

diff --git a/configure.ac b/configure.ac
index 03865ab98d0f52dff7fa4e7b177675464de888e1..65e0b42390bb4745488cc1bf13550f0cc18bf9d1 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -112,7 +112,7 @@ for lib in "glib-2.0 >= 2.28.0" "libsigrok >= 0.2.0" "libsigrokdecode >= 0.2.0";
                        answer="no"
                fi
        fi
-       echo "  - $lib: $answer"
+       echo "  - (REQUIRED) $lib: $answer"
 done
 
 echo