added debug info

.travis.yml

@@ -5,13 +5,6 @@ python:
 # command to install dependencies
 sudo: enabled
 dist: trusty
-addons:
-  apt:
-    packages:
-      - libblas-dev
-      - liblapack-dev
-      - gcc
-      - gfortran
 install:
   # We do this conditionally because it saves us some downloading if the
   # version is the same.
@@ -20,6 +13,9 @@ install:
   - sudo apt-get -qq install g++-5
   - sudo apt-get -qq install gcc-5
   - sudo apt-get -qq install gfortran-5
+  - gcc -v | echo
+  - g++ -v | echo
+  - gfortran -v | echo
   # - export CXX="g++-6" CC="gcc-6"
   - sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 60 --slave /usr/bin/g++ g++ /usr/bin/g++-5 --slave /usr/bin/gfortran gfortran /usr/bin/gfortran-5
   - wget https://repo.continuum.io/miniconda/Miniconda3-4.3.21-Linux-x86_64.sh -O miniconda.sh