travis: fix issue with Travis and libtool

diff --git a/tests/ci/install.sh b/tests/ci/install.sh
index 0b4063ce88ed9fecbbe18cee3c38553e668edc39..070ef5f0c5b479ef043f3045e39b40d1ba07f0b3 100755 (executable)
--- a/tests/ci/install.sh
+++ b/tests/ci/install.sh
@@ -5,7 +5,10 @@ set -e
 case "$(uname -s)" in
     Darwin)
         brew update
-        brew install libevent jansson libxml2 check net-snmp
+        # Workaround a bug in Travis:
+        # https://github.com/Homebrew/legacy-homebrew/issues/43874
+        brew uninstall libtool
+        brew install libtool libevent jansson libxml2 check net-snmp
         ;;
     Linux)
         # We prefer gcc-5