Travis wants "cpp", not "c++". It just happened to work anyway because the base image includes the same tools.tags/v1.9.90
@@ -9,7 +9,7 @@ env: | |||
matrix: | |||
include: | |||
- language: c++ | |||
- language: cpp | |||
env: | |||
before_install: | |||
- sudo apt-get install -y libgnutls-dev libfltk1.3-dev fluid |